Hindawi Parkinson’s Disease Volume 2021, Article ID 8871549, 16 pages https://doi.org/10.1155/2021/8871549 Research Article Staging Parkinson’s Disease Combining Motor and Nonmotor Symptoms Correlates with Disability and Quality of Life D. Santos Garcı́a ,1 T. De Deus Fonticoba,2 J. M. Paz González,1 C. Cores Bartolomé,1 L. Valdés Aymerich,1 J. G. Muñoz Enrı́quez,1 E. Suárez,2 S. Jesús,3,4 M. Aguilar,5 P. Pastor,5 L. L. Planellas,6 M. Cosgaya,6 J. Garcı́a Caldentey,7 N. Caballol,8 I. Legarda,9 J. Hernández Vara,10 I. Cabo,11 L. López Manzanares,12 I. González Aramburu,4,13 M. A. Ávila Rivera,14 M. J. Catalán,15 V. Nogueira,16 V. Puente,17 J. M. Garcı́a Moreno,18 C. Borrué,19 B. Solano Vila,20 M. Álvarez Sauco,21 L. Vela,22 S. Escalante,23 E. Cubo,24 F. Carrillo Padilla,25 J. C. Martı́nez Castrillo,26 P. Sánchez Alonso,27 M. G. Alonso Losada,28 N. López Ariztegui ,29 I. Gastón,30 J. Kulisevsky,4,31 M. Blázquez Estrada,32 M. Seijo,11 J. Rúiz Martı́nez,33 C. Valero,34 M. Kurtis,35 O. de Fábregues,10 J. González Ardura,36 C. Ordás,37 L. López Dı́az,38 P. Mir,4,3 P. Martinez-Martin ,4 and COPPADIS Study Group39 1 CHUAC, Complejo Hospitalario Universitario de A Coruña, A Coruña, Spain 2 CHUF, Complejo Hospitalario Universitario de Ferrol, A Coruña, Spain 3 Unidad de Trastornos del Movimiento, Servicio de Neurologı́a y Neurofisiologı́a Clı́nica, Instituto de Biomedicina de Sevilla, Hospital Universitario Virgen del Rocı́o/CSIC/Universidad de Sevilla, Seville, Spain 4 CIBERNED (Centro de Investigación Biomédica en Red Enfermedades Neurodegenerativas), Madrid, Spain 5 Hospital Universitari Mutua de Terrassa, Terrassa, Spain 6 Hospital Clı́nic de Barcelona, Barcelona, Spain 7 Centro Neurológico Oms 42, Palma de Mallorca, Spain 8 Consorci Sanitari Integral, Hospital Moisés Broggi, Sant Joan Despı́, Barcelona, Spain 9 Hospital Universitario Son Espases, Palma de Mallorca, Spain 10 Hospital Universitario Vall d´Hebron, Barcelona, Spain 11 Complejo Hospitalario Universitario de Pontevedra (CHOP), Pontevedra, Spain 12 Hospital Universitario La Princesa, Madrid, Spain 13 Hospital Universitario Marqués de Valdecilla, Santander, Spain 14 Consorci Sanitari Integral, Hospital General de L´Hospitalet, L´Hospitalet de Llobregat, Barcelona, Spain 15 Hospital Universitario Clı́nico San Carlos, Madrid, Spain 16 Hospital Da Costa, Burela, Lugo, Spain 17 Hospital del Mar, Barcelona, Spain 18 Hospital Universitario Virgen Macarena, Sevilla, Spain 19 Hospital Infanta Sofı́a, Madrid, Spain 20 Institut d’Assistència Sanitària (IAS) - Institut Català de la Salut, Girona, Spain 21 Hospital General Universitario de Elche, Elche, Spain 22 Fundación Hospital de Alcorcón, Madrid, Spain 23 Hospital de Tortosa Verge de la Cinta (HTVC), Tortosa, Tarragona, Spain 24 Complejo Asistencial Universitario de Burgos, Burgos, Spain 25 Hospital Universitario de Canarias, San Cristóbal de la Laguna, Santa Cruz de Tenerife, Spain 26 Hospital Universitario Ramón y Cajal, Madrid, Spain 27 Hospital Universitario Puerta de Hierro, Madrid, Spain 28 Hospital Álvaro Cunqueiro, Complejo Hospitalario Universitario de Vigo (CHUVI), Vigo, Spain 29 Complejo Hospitalario de Toledo, Toledo, Spain 30 Complejo Hospitalario de Navarra, Pamplona, Spain 31 Hospital de Sant Pau, Barcelona, Spain 2 Parkinson’s Disease 32 Hospital Universitario Central de Asturias, Oviedo, Spain 33 Hospital Universitario Donostia, San Sebastián, Spain 34 Hospital Arnau de Vilanova, Valencia, Spain 35 Hospital Ruber Internacional, Madrid, Spain 36 Hospital Universitario Lucus Augusti (HULA), Lugo, Spain 37 Hospital Rey Juan Carlos, Madrid, Spain 38 Complejo Hospitalario Universitario de Orense (CHUO), Orense, Spain 39 Fundación Curemos el Parkinson, C/Juana de Vega 23 2°, A Coruña 15004, Spain Correspondence should be addressed to D. Santos Garcı́a; diegosangar@yahoo.es Received 13 September 2020; Revised 4 November 2020; Accepted 21 February 2021; Published 15 May 2021 Academic Editor: Graziella Madeo Copyright © 2021 D. Santos Garcı́a et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Introduction. In a degenerative disorder such as Parkinson’s disease (PD), it is important to establish clinical stages that allow to know the course of the disease. Our aim was to analyze whether a scale combining Hoehn and Yahr’s motor stage (H&Y) and the nonmotor symptoms burden (NMSB) (assessed by the nonmotor symptoms scale (NMSS)) provides information about the disability and the patient’s quality of life (QoL) with regard to a defined clinical stage. Materials and Methods. Cross-sectional study in which 603 PD patients from the COPPADIS cohort were classified according to H&Y (1, stage I; 2, stage II; 3, stage III; 4, stage IV/V) and NMSB (A: NMSS � 0–20; B: NMSS � 21–40; C: NMSS � 41–70; D: NMSS ≥ 71) in 16 stages (HY.NMSB, from 1A to 4D). QoL was assessed with the PDQ-39SI, PQ-10, and EUROHIS-QOL8 and disability with the Schwab&England ADL (Activities of Daily Living) scale. Results. A worse QoL and greater disability were observed at a higher stage of H&Y and NMSB (p < 0.0001). Combining both (HY.NMSB), patients in stages 1C and 1D and 2C and 2D had significantly worse QoL and/or less autonomy for ADL than those in stages 2A and 2B and 3A and 3B, respectively (p < 0.005; e.g., PDQ-39SI in 1D [n � 15] vs 2A [n � 101]: 28.6 ± 17.1 vs 7.9 ± 5.8; p < 0.0001). Conclusion. The HY.NMSB scale is simple and reflects the degree of patient in- volvement more accurately than the H&Y. Patients with a lower H&Y stage may be more affected if they have a greater NMS burden. 1. Introduction tools for assessing NMS such as the NMSQuest [6] and the nonmotor symptoms scale (NMSS) [7] are used both in Parkinson’s disease (PD) is a progressive neurodegenera- trials and in clinical practice. Furthermore, it has been tive disorder causing motor and nonmotor symptoms demonstrated that NMS are an important determinant and (NMS) that result in disability, loss of patient autonomy, deteriorating factor of the quality of life (QoL) of PD and caregiver burden [1]. In a degenerative disease, it is patients [8, 9]. Not only motor symptoms but also NMS important to establish clinical stages that allow the de- increase in their severity and burden over time, increasing termination of disease progression for a patient based on patients’ disability, with additional worsening of their QoL, different specific symptoms. Ideally, this clinical gradua- as well as caregivers’ burden and consequential con- tion should be simple to carry out so that it can be used sumption of social resources by increasing societal costs. universally in clinical practice. In the case of PD, and based That is why for staging PD it would be necessary to combine on the classic motor symptoms of the disease, the Hoehn a motor with a nonmotor scale, which would allow the and Yahr (H&Y) scale is used to describe the progression of patient to be classified into stages considering both the PD [2]. The scale was originally described in 1967 and degree of motor and nonmotor involvement. included stages 1 through 5. It has since been modified with Recently, it has been suggested that gradation of PD the addition of stages 1.5 and 2.5 to help describe the according to the motor impairment and burden of NMS is intermediate course of the disease [3]. This rating system an unmet need for an appropriate management of patients has been largely supplemented by, firstly, the Unified [10]. Ray Chaudhuri et al. proposed a PD classification by Parkinson’s Disease Rating Scale (UPDRS) [4], and more H&Y staging and NMS burden level and demonstrated a recently, the MDS-Unified Parkinson’s Disease Rating correlation of both H&Y staging and NMS burden to dis- Scale (MDS-UPDRS) [5], which assess limitation of Ac- ability and QoL [11]. However, QoL and autonomy for ADL tivities of Daily Living (ADL) and NMS. However, eval- regarding the stage considering both together, motor and uating the patient using the UPDRS and/or MDS-UPDRS nonmotor stages, were not analyzed. The H&Y scale pro- takes time; specialization is required and, importantly, do vides quick information about the patient’s condition, but not allow the patient to be classified into a clearly differ- since it does not include NMS, it is not very sensitive to entiated stage, and several NMS are not included. Validated reflect the real impact of that condition. Our hypothesis is Parkinson’s Disease 3 that a patient with a lower H&Y stage but a greater NMS 26; score, 0 to 24); (9) miscellaneous (items 27, 28, 29, and burden may present a worse QoL and greater disability than 30; score, 0 to 48). another patient with a more advanced H&Y stage but a lower Three different instruments were used to assess QoL: (1) NMS burden, so it would be beneficial to combine both the PDQ-39 [14]; (2) a rating of global perceived QoL (PQ- aspects on a scale. The aim of this study was to classify PD 10) on a scale from 0 (worst) to 10 (best) [8, 15]; and (3) the patients from the COPPADIS cohort [12, 13], regarding EUROHIS-QOL8 [16]. The PDQ-39 is a PD-specific ques- H&Y and NMS burden combined in a specific scale tionnaire that assesses the patients’ health-related QoL. (HY.NMSB), and to compare QoL and autonomy for ADL There are 39 items grouped into 8 domains: (1) mobility between patients in a different HY.NMSB stages. (items 1 to 10); (2) Activities of Daily Living (items 11 to 16); (3) emotional well-being (items 17 to 22); (4) stigma (items 2. Materials and Methods 23 to 26); (5) social support (items 27 to 29); (6) cognition (items 30 to 33); (7) communication (items 34 to 36); and (8) PD patients recruited from 35 centers of Spain from the pain and discomfort (items 37 to 39). For each item, the COPPADIS cohort [13] from January 2016 to November 2017 score may range from 0 (never) to 4 (always). The symptoms were included in the study. Methodology about COPPADIS- refer to the 4 weeks prior to assessment. Domain total scores 2015 study can be consulted in https://bmcneurol. are expressed as a percentage of the corresponding maxi- biomedcentral.com/articles/10.1186/s12883-016-0548-9. mum possible score, and a Summary Index is obtained as This is a multicenter, observational, longitudinal-pro- average of the domain scores. The EUROHIS-QOL8 is an 8- spective, 5-year follow-up study designed to analyze disease item global QoL questionnaire (quality of life, health status, progression in a Spanish population of PD patients. The data energy, autonomy for Activities of Daily Living, self-esteem, for the present study (cross-sectional study) were obtained social relationships, economic capacity, and habitat) derived from the baseline evaluation. All patients included were from the WHOQOL-BREF. For each item, the score ranges diagnosed according to UK PD Brain Bank criteria. Ex- from 0 (not at all) to 5 (completely). The total score is clusion criteria were as follows: non-PD parkinsonism, expressed as the mean of the individual scores. A higher dementia (Mini Mental State Examination (MMSE) < 26), score indicates a better QoL. The Schwab and England age <18 or >75 years, inability to read or understand the Activities of Daily Living Scale (ADLS) was used for questionnaires, to be receiving any advanced therapy assessing disability [17]. Functional dependency was defined (continuous infusion of levodopa or apomorphine and/or as an ADLS score less than 80% (80% � completely inde- with deep brain stimulation), and the presence of comor- pendent; 70% � not completely independent) [18]. bidity, sequelae, or any disorder that could interfere with the assessment. 2.1. Data analysis. Data were processed using SPSS 20.0 for Information on sociodemographic aspects, factors re- Windows. NMS burden was defined as follows: mild (NMSS lated to PD, comorbidity, and treatment was collected. 1-20); moderate (NMSS 21-40); severe (NMSS 41-70); and Motor and NMS were evaluated using different validated very severe (NMSS > 70) [10]. Each domain of the NMSS was scales [12]. In patients with motor fluctuations, the motor expressed as a percentage: (score/total score) × 100. The assessment (H&Y and UPDRS) was conducted during the patients were classified according to H&Y-OFF (1, stage I; 2, OFF state (without medication in the last 12 hours; H&Y- stage II; 3, stage III; 4, stage IV /V) and NMS burden (A: 0- OFF and UPDRS-III-OFF) and during the ON state (H&Y- 20; B: 21-40; C: 41-70; D: ≥ 71) in 16 stages (HY.NMSB): 1A, ON and UPDRS-III-ON). However, in patients without 1B, 1C, 1D, 2A, 2B, 2C, 2D, 3A, 3B, 3C, 3D, 4A, 4B, 4C, and motor fluctuations, it was only performed without medi- 4D. PDQ-39 was expressed as a Summary Index (PDQ- cation (first thing in the morning without taking medication 39SI): (score/156) × 100. For comparisons between patients in the previous 12 hours). Moreover, in PD patients with with a different H&Y stage, NMS burden stage, and/or motor fluctuations, the nonmotor assessment was con- HY.NMSB stage, chi-squared, ANOVA, and/or Man- ducted during the ON state [12]. The NMSS [7] was used for n–Whitney–Wilcoxon test were applied. With the aim of assessing NMS. This includes 30 items, each with a different determining if the HY.NMSB contributes to the patient’s nonmotor symptom. The symptoms refer to the 4 weeks QoL independently of other factors, a multiple regression prior to assessment. The total score for each item is the result analysis was conducted (PDQ-39SI as dependent variable). of multiplying the frequency (0, never; 1, rarely; 2, often; 3, A p value < 0.05 was considered significant. frequent; 4, very often) x severity (1, mild; 2, moderate; 3, severe) and will vary from 0 to 12 points. The scale score ranges from 0 to 360 points. The items are grouped into 9 2.2. Standard Protocol Approvals, Registrations, and Patient different domains: (1) cardiovascular (items 1 and 2; score, 0 Consent. For this study, we received approval from the to 24); (2) sleep/fatigue (items 3, 4, 5, and 6; score, 0 to 48); Comité de Ética de la Investigación Clı́nica de Galicia from (3) depression/apathy (items 7, 8, 9, 10, 11, and 12; score, 0 to Spain (2014/534; 02/DEC/2014). Written informed consents 72); (4) perceptual problems/hallucinations (items 13, 14, from all participants in this study were obtained before the and 15; score, 0 to 36); (5) attention/memory (items 16, 17, start of the study. COPPADIS-2015 was classified by the and 18; score, 0 to 36); (6) gastrointestinal tract (items 19, 20, AEMPS (Agencia Española del Medicamento y Productos and 21; score, 0 to 36); (7) urinary symptoms (items 22, 23, Sanitarios) as a postauthorization prospective follow-up and 24; score, 0 to 36); (8) sexual dysfunction (items 25 and study with the code COH-PAK-2014-01. 4 Parkinson’s Disease 3. Results were compared with those ones with a stage III, a worse QoL was observed in patients with stage II and very severe NMS A total of 603 PD patients (62.7 ± 8.9 years old; 59.5% males) burden (HY.NMSB 2D; n � 91) than those in patients with a from the COPPADIS cohort were included in the analysis. stage III of H&Y but mild NMS burden (HY.NMSB 3A; The mean disease duration was 5.7 ± 4.5 years. One-hundred n � 6) or moderate NMS burden � (HY.NMSB 3B; n � 9): and twenty-eight (22.9%) patients were in stage I of H&Y, PDQ-39SI 31.8 ± 3.8 vs 14.2 ± 10.9 p � 0.003; 31.8 ±13.8 vs. 407 (67.5%) in stage II of H&Y, 49 (8.1%) in stage III of 21.5 ± 7.9 (p � 0.029): PQ-10, 6.2 ± 1.6 vs 8.5 ± 1.5 H&Y, and only 9 (1.5%) in stage IV/V of H&Y. The mean (p � 0.003); EUROHIS-QOL8, 3.8 ± 0.6 vs 3.6 ± 0.4 NMSS total score was 46.7 ± 38.2, presenting 162 (26.9%) (p � 0.048) (Table 4 and Figure 2). patients with mild NMS burden, 174 (28.8%) with moderate In a simple linear regression model, the HY.NMSB scale NMS burden, 140 (23.2%) with severe NMS burden, and 127 predicted the PDQ-39SI: β � 0.480; CI 95%, 1.981 – 2.661; (21.1%) with very severe NMS burden. No patient presented p < 0.0001. After adjustment to other covariates (age, gen- absence of nonmotor symptoms (NMSS � 0). Data about der, disease duration, levodopa equivalent daily dose, PD-related variables are shown in Table SM 1. When H&Y UPDRS-IV, FOGQ, and BDI-II), the HY.NMSB stage and NMS burden were combined (HY.NMSB), a higher contributed significantly to the patient’s QoL (PDQ-39SI as percentage of patients with severe or very severe NMS dependent variable) as well: adjusted R-squared 0.591; β � burden in advanced H&Y stages (III and/or IV/V) 0.089; CI 95%, 0.098 – 0.770; p � 0.011 (Table 2. SM). As (p < 0.0001) was observed (Figure 1). compared to the classical H&Y stage alone (not significant in A worse QoL and a greater disability were associated the model), the HY.NMS was multiplied by 12.7 the size with a higher H&Y stage. Specifically, the PDQ-39SI and the effect over the PDQ-39SI (β standardized coefficient of 0.007 EUROHIS-QOL8 total score were significantly lower and for the H&Y in a model with age, gender, disease duration, higher, respectively, in patients with a lower H&Y (Table 1 levodopa equivalent daily dose, UPDRS-IV, FOGQ, BDI-II, and Figure 2(a)). The ADLS score was higher (indicative of and NMSS (p � 0.823) vs 0.089 for the HY.NMS in the lower disability) in patients with a lower H&Y (Table 1). model with the same covariates included except the NMSS When patients with a consecutive stage of H&Y were (p � 0.011)). compared, the most significant differences were observed between patients with a stage II of H&Y and those ones with 4. Discussion stage III, but no differences were observed between patients with a stage III of H&Y and those ones with stage IV (only 9 The present study observed that the use in PD patients of a patients in this last subgroup) (Table 1). QoL and disability scale that combines the H&Y stage with the NMSS were related to NMS burden as well, so the higher the NMS (HY.NMSB) could be useful since it would not only inform burden stage, the worse the QoL, and the greater the dis- about motor and nonmotor aspects but would also serve to ability (Table 2 and Figure 2(b)). After classifying partici- know how is the patient’s QoL and autonomy for ADL. This pants by combining both scales, H&Y and NMSS (NMSB), is relevant because many PD patients can be in stages I to III QoL and disability were related to the HY.NMSB stage of H&Y for many years and stratification regarding NMS (Figure 2(c)): PDQ-39SI, from 6.7 ± 4.9 (HY.NMSB 1A) to burden providing useful information not only for diagnosis 42.9 ± 11.9 (HY.NMSB 4D) (p < 0.0001); EUROHIS-QOL8 but also for monitoring the outcome and ideally the response total score, from 4.1 ± 0.5 (HY.NMSB 1A) to 3.1 ± 0.6 to a medication. (HY.NMSB 3D) (p < 0.0001; only 1 patient in the stage 4B Ray Chaudhuri et al. [11] proposed a new strategy for but with a score of 4.5); and ADLS score, from 94.9 ± 5.7 clinical classification of PD patients using the NMSS in 5 (HY.NMSB 1A) to 55 ± 19.1 (HY.NMSB 4D) (p < 0.0001). stratified levels of burden (0 � no NMS; 1 � NMSS, 1-20; With regard to our hypothesis, it was observed that patients 2 � NMSS, 21-40; 3 � NMSS, 41-70; 4 � NMSS > 70) and with a lower stage of H&Y could have a worse QoL and/or a suggested that this simple assessment could be added to greater disability if they had a greater NMS burden (Tables 3 existing motor-based staging (i.e., H & Y) to complement and 4). For example, patients with stage I of H&Y and very PD assessment and avoid overlooking the weight of the severe NMS burden (HY.NMSB 1D; n � 15) compared to NMS. In 951 PD patients, these authors observed a signif- patients with stage II of H&Y but mild NMS burden icant influence of NMS burden on disability and QoL, (HY.NMSB 2A; n � 101) had a higher PDQ-39SI (28.6 ± 17.1 highlighting the need to include an NMS evaluation for a vs 7.9 ± 5.8; p < 0.0001) and a lower PQ-10 (6.4 ± 1.5 vs complete assessment of PD patients. We observed the same 7.9 ± 1.2; p < 0.0001), EUROHIS-QOL8 (3.5 ± 0.4 vs in 603 PD patients from the COPPADIS cohort. However, 4.1 ± 0.4p < 0.0001), and ADLS score (88 ± 6.8 vs 91.8 ± 5.9; here, we define specifically a scale (HY.NMSB) combining p � 0.025) (Table 3 and Figure 2). Even PDQ-39SI the H&Y stage with the NMS burden: firstly, a number for (198 ± 11.9 vs 13.8 ± 9.8; p � 0.003) and EUROHIS-QOL8 the H&Y from 1 (stage I) to 4 (stage IV/V); secondly, a letter score (3.6 ± 0.5 vs 3.9 ± 0.5; p � 0.030), we are significantly for the NMS burden from A (non NMS or mild NMS higher and lower, respectively, in those patients with stage I burden; NMSS 0-20) to D (very severe burden; NMSS > 70). of H&Y and severe NMS burden HY.NMSB 1C; n � 27) than Combining the number with the letter, a total of 16 stages are those in ones with stage < II of H&Y and moderate NMS defined, from HY.NMSB 1A (H&Y I and non-NMS/mild burden (HY.NMS burden 2B; n � 125) (Table 3 NMS burden) to 4D (H&Y IV/V and very severe NMS and Figure 2). When patients with a stage II of H&Y burden). PD patients without NMS (i.e., NMSS total Parkinson’s Disease 5 HY.NMSB 1A - 1D HY.NMSB 2A - 2D HY.NMSB 3A - 3D HY.NMSB 4A - 4D 140 120 100 80 60 40 20 0 A C B D (a) 10.9% 13% 11.2% 22.2% 24.6% 19.6% 39.8 37% 19.6% 44.4% 22.7% 44.4% 30.5% 29.7% 30.4% (b) Figure 1: Total number (a) and percentage (b) of PD patients presenting with different stages of the HY.NMSB scale (from 1A to 4D) (n � 603). Table 1: Quality of life (PDQ-39SI and EUROHIS-QOL8) and disability (ADLS score) in PD patients with regard to Hoehn and Yahr stage (s � 603). H&Y 1, N � 138 H&Y 2, N � 407 H&Y 3, N � 49 H&Y 4, N � 9 pa pb pc pd PDQ-39SI 13.3 ± 12.1 17.1 ± 12.9 30.9 ± 15.3 30.3 ± 15.3 <0.0001 0.037 <0.0001 0.908 Mobility 10.9 ± 14.2 16.1 ± 18 41.6 ± 23.8 37.2 ± 24.3 <0.0001 0.036 <0.0001 0.613 Activities of Daily Living 13.4 ± 14.3 18.3 ± 18.1 33.6 ± 24 29.1 ± 19.1 <0.0001 0.023 <0.0001 0.604 Emotional well-being 18.9 ± 16.9 21.6 ± 20.7 34.3 ± 21.9 32.8 ± 13.2 <0.0001 0.372 <0.0001 0.846 Stigma 12.3 ± 17 13.2 ± 19.7 16.1 ± 22.1 22.9 ± 32.7 0.316 0.839 0.341 0.432 Social support 6.8 ± 14.3 8.6 ± 16.9 9.7 ± 19.7 12.9 ± 22.1 0.497 0.492 0.686 0.656 Cognition 14.9 ± 16.4 20.1 ± 18.1 27.2 ± 18.9 31.2 ± 17.9 <0.0001 0.015 0.011 0.553 Communication 8.8 ± 13.8 9.5 ± 14.2 17.3 ± 19.7 19.4 ± 17.6 0.001 0.522 0.001 0.766 Pain and discomfort 21.1 ± 19.9 26.9 ± 22.9 42.5 ± 22.5 40.7 ± 28.9 <0.0001 0.065 <0.0001 0.835 PQ-10 7.5 ± 1.5 7.2 ± 6.2 6.2 ± 2.1 6.9 ± 1.4 <0.0001 0.234 <0.0001 0.375 EUROHIS-QOL8 3.9 ± 0.5 3.8 ± 0.5 3.3 ± 0.6 3.7 ± 0.5 <0.0001 0.117 <0.0001 0.135 Quality of life 3.9 ± 0.7 3.8 ± 0.7 3.2 ± 0.8 3.8 ± 0.4 <0.0001 0.207 <0.0001 0.063 Health status 3.4 ± 0.8 3.1 ± 0.9 2.5 ± 0.9 2.9 ± 0.8 <0.0001 0.012 <0.0001 0.296 Energy 3.9 ± 0.8 3.7 ± 0.8 3.2 ± 0.8 3.7 ± 1.1 <0.0001 0.195 <0.0001 0.156 Autonomy for ADL 3.8 ± 0.7 3.6 ± 0.8 2.8 ± 0.8 3.1 ± 0.8 <0.0001 0.023 <0.0001 0.289 Self-esteem 3.9 ± 0.7 3.8 ± 0.8 3.4 ± 0.9 3.4 ± 0.7 0.001 0.437 0.001 0.863 Social relationships 4 ± 0.7 4.1 ± 0.7 3.7 ± 0.8 4 ± 0.9 0.021 0.890 0.004 0.388 Economic capacity 3.9 ± 0.7 3.7 ± 0.8 3.7 ± 1 3.9 ± 0.7 0.414 0.819 0.160 0.546 Habitat 4.3 ± 0.7 4.2 ± 0.7 4.1 ± 0.8 4.4 ± 0.5 0.287 0.832 0.112 0.161 ADLS score 93.5 ± 6.9 87.8 ± 9.4 77.1 ± 13.1 72.5 ± 23.8 <0.0001 <0.0001 <0.0001 0.416 Functional dependency (%) 0.7 8.8 42.9 37.5 <0.0001 <0.0001 <0.0001 0.546 Chi-squared, Mann–Whitney–Wilcoxon, and ANOVA test were applied. The results represent percentages or mean±SD; pa, all groups; pb, H&Y 2 vs H&Y 1; pc, H&Y 3 vs H&Y 2; pd, H&Y 4 vs H&Y 3. ADL, Activities of Daily Living; ADLS, Schwab and England Activities of Daily Living Scale; EUROHIS-QOL8, EUROHIS-QOL 8-item index; H&Y, Hoehn and Yahr; PDQ-39SI, 39-item Parkinson’s Disease Quality of Life Questionnaire Summary Index. score � 0) are rare (none in this cohort), but in any case, they and another one with NMSS total score � 1 or 3. So, “A” is are included as “A” because there is really no difference defined as a patient without NMS or mild NMS burden. On between, for example, a patient with NMSS total score � 0 the other hand and with the idea of simplifying the scale, 6 Parkinson’s Disease Hoehn and Yahr (HY) NMSB HY.NMSB 60,00 60,00 60,00 PDQ-39SI PDQ-39SI PDQ-39SI 40,00 40,00 40,00 20,00 20,00 20,00 0,00 0,00 0,00 1,00 2,00 3,00 4,00 A B C D 1A1B 1C1D2A2B 2C2D3A3B 3C3D4B 4C4D 13.3 17.1 30.9 30.3 ± 12.1 ± 12.9 ± 15.3 ± 15.3 5,00 5,00 5,00 4,50 4,50 4,50 EUROHIS-QOL8 EUROHIS-QOL8 EUROHIS-QOL8 4,00 4,00 4,00 3,50 3,50 3,50 3,00 3,00 3,00 2,50 2,50 2,50 2,00 2,00 2,00 1,00 2,00 3,00 4,00 A B C D 1A1B 1C1D2A2B 2C2D3A3B 3C3D4B 4C4D 3.9 3.8 3.3 3.7 ± 0.5 ± 0.5 ± 0.6 ± 0.5 (a) (b) (c) Figure 2: PDQ-39SI and EUROHIS-QOL8 scores in patients with regard to the H&Y (a), the nonmotor symptoms burden (NMSB) (b), and both (HY.NMSB) (c) (n � 603). Table 2: Quality of life (PDQ-39SI and EUROHIS-QOL8) and disability (ADLS score) in PD patients with regard to nonmotor symptoms burden: mild (NMS 1-20); moderate (NMS total score 21-40); severe (NMS total score 41-70); very severe (NMS total score > 70). Mild, Moderate, Severe, Very severe, pa pb pc pd N � 162 N � 174 N � 140 N � 127 PDQ-39SI 7.7 ± 5.7 13.8 ± 9.7 19.9 ± 10.7 32.9 ± 14.4 <0.0001 <0.0001 <0.0001 <0.0001 Mobility 6.2 ± 11.5 12.7 ± 15.6 19.7 ± 15.9 35.3 ± 22.9 <0.0001 <0.0001 0.029 <0.0001 Activities of Daily Living 9.5 ± 11.1 15.8 ± 15.4 19.8 ± 16.7 32.4 ± 23.3 <0.0001 <0.0001 <0.0001 <0.0001 Emotional well-being 9.9 ± 10.8 15.6 ± 13.9 26.6 ± 18.7 41.6 ± 22.6 <0.0001 0.001 0.149 <0.0001 Stigma 7.6 ± 14.1 13.7 ± 18.9 10.8 ±16.2 22.9 ± 25.5 <0.0001 0.025 0.001 <0.0001 Social support 2.2 ± 8.9 4.9 ± 12.8 10.6 ± 17.5 18.6 ± 21.9 <0.0001 <0.0001 <0.0001 0.001 Cognition 7.2 ± 9.6 16.2 ± 13.9 24.6 ± 16.2 34.9 ± 20.1 <0.0001 <0.0001 0.036 <0.0001 Communication 3.5 ± 7.3 8.3 ± 12.4 11.6 ± 14.7 19.3 ± 19.7 <0.0001 <0.0001 <0.0001 <0.0001 Pain and discomfort 14.7 ± 15.6 20.7 ± 18.9 30.7 ± 19.6 47.4 ± 24.8 <0.0001 0.002 <0.0001 <0.0001 PQ-10 7.9 ± 1.2 7.5 ± 1.4 6.9 ± 1.4 6.1 ± 1.7 <0.0001 <0.0001 0.003 <0.0001 EUROHIS-QOL8 4.1 ± 0.5 3.9 ± 0.4 3.6 ± 0.5 3.3 ± 0.6 <0.0001 <0.0001 <0.0001 <0.0001 Quality of life 4.1 ± 0.5 3.9 ± 0.6 3.7 ± 0.7 3.3 ± 0.8 <0.0001 0.005 0.001 <0.0001 Health status 3.5 ± 0.8 3.3 ± 0.8 3 ± 0.8 2.6 ± 0.9 <0.0001 0.001 0.006 <0.0001 Energy 4.2 ± 0.7 3.8 ± 0.7 3.6 ± 0.8 3.2 ± 0.9 <0.0001 <0.0001 0.004 <0.0001 Autonomy for ADL 4 ± 0.7 3.8 ± 0.8 3.4 ± 0.8 3 ± 0.9 <0.0001 0.001 <0.0001 <0.0001 Self-esteem 4.2 ± 0.6 3.9 ± 0.7 3.6 ± 0.7 3.3 ± 0.9 <0.0001 0.010 <0.0001 0.001 Social relationships 4.4 ± 0.6 4.1 ± 0.6 3.9 ± 0.7 3.6 ± 0.8 <0.0001 <0.0001 0.059 <0.0001 Economic capacity 4.1 ± 0.8 3.9 ± 0.7 3.8 ± 0.7 3.5 ± 0.9 <0.0001 0.079 0.180 0.001 Habitat 4.4 ± 0.7 4.3 ± 0.6 4.2 ± 0.7 3.9 ± 0.7 <0.0001 0.105 0.123 0.011 ADLS score 92.9 ± 6.1 90.2 ± 8.3 86.5 ± 10.4 80.5 ± 12.9 <0.0001 0.001 <0.0001 <0.0001 Functional 0.6 4.6 11.5 28.3 <0.0001 0.024 0.019 <0.0001 dependency (%) very advanced PD patients with regard to motor stage (H&Y burden as well, so patients with a lower H&Y but a greater IV and V) are considered together as number 4. After ap- NMS burden can perceive a worse QoL and greater disability plying this scale (HY.NMSB) for the first time, we observed than patients with a higher H&Y stage but lower NMS that QoL and disability were related to H&Y but NMS burden. Conventionally, H&Y stages I and II represent mild Parkinson’s Disease 7 Table 3: Quality of life (PDQ-39SI and EUROHIS-QOL8) and disability (ADLS score) in patients with stages 1C, 1D, 2A, or 2B of the HY-NMSB scale. 1C, N � 27 1D, N � 15 2A, N � 101 2B, N � 125 pa pb pc pd PDQ-39SI 19.8 ± 11.9 28.6 ± 17.1 7.9 ± 5.8 13.8 ± 9.8 <0.0001 <0.0001 <0.0001 0.003 Mobility 18.1 ± 14.9 27.8 ± 17.7 6.1 ± 10.5 13 ± 16.2 <0.0001 0.001 <0.0001 0.035 Activities of Daily Living 16.5 ± 15.2 28.3 ± 18.3 10.9 ± 12.4 15.9 ± 16.1 <0.0001 0.007 0.056 0.710 Emotional well-being 28.7 ± 16.4 35.5 ± 21.3 8.9 ± 9.4 14.9 ± 13.7 <0.0001 <0.0001 <0.0001 <0.0001 Stigma 16.4 ± 20.4 23.8 ± 23.9 8.4 ± 15.7 13.9 ± 19.9 0.013 0.140 0.030 0.448 Social support 13.6 ± 17.8 19.4 ± 22.6 2.4 ± 9.9 5.3 ± 13.8 <0.0001 0.003 <0.0001 0.005 Cognition 21.9 ± 17.4 32.5 ± 18.8 8.3 ± 9.6 15.9 ± 13.7 <0.0001 0.001 <0.0001 0.099 Communication 14.2 ± 15.9 20.6 ± 19.6 4.1 ± 8.4 7.9 ± 12.1 <0.0001 0.007 <0.0001 0.026 Pain and discomfort 27.8 ± 20.1 38.3 ± 27.4 13.5 ± 13.5 21.2 ± 20.3 <0.0001 0.010 <0.0001 0.053 PQ-10 6.9 ± 1.6 6.4 ± 1.5 7.9 ± 1.2 7.5 ± 1.5 <0.0001 0.008 0.008 0.201 EUROHIS-QOL8 3.6 ± 0.5 3.5 ± 0.4 4.1 ± 0.4 3.9 ± 0.5 <0.0001 0.004 <0.0001 0.030 Quality of life 3.6 ± 0.6 3.2 ± 0.6 4.1 ± 0.6 3.9 ± 0.6 <0.0001 <0.0001 0.001 0.048 Health status 3.2 ± 0.9 3.2 ± 0.6 3.6 ± 0.7 3.3 ± 0.8 0.014 0.726 0.051 0.888 Energy 3.4 ± 0.7 3.4 ± 0.6 4.1 ± 0.6 3.8 ± 0.7 <0.0001 0.025 <0.0001 0.009 Autonomy for ADL 3.5 ± 0.7 3.5 ± 0.5 4.1 ± 0.6 3.7 ± 0.7 <0.0001 0.065 <0.0001 0.089 Self-esteem 3.6 ± 0.8 3.5 ± 0.6 4.2 ± 0.6 3.9 ± 0.7 <0.0001 0.015 <0.0001 0.016 Social relationships 3.9 ± 0.6 3.8 ± 0.6 4.4 ± 0.6 4.2 ± 0.6 0.001 0.023 <0.0001 0.022 Economic capacity 3.7 ± 0.7 3.4 ± 0.7 3.9 ± 0.8 3.9 ± 0.6 0.010 0.025 0.014 0.054 Habitat 3.9 ± 0.8 3.9 ± 0.7 4.4 ± 0.6 4.3 ± 0.6 0.005 0.001 0.160 0.114 ADLS score 92.6 ± 7.1 88 ± 6.8 91.8 ± 5.9 89.5 ± 8 0.025 0.246 0.461 0.061 FD (%) 0 0 1 4 0.871 0.562 0.789 0.371 Chi-squared and Mann–Whitney–Wilcoxon test were applied. The results represent percentages or mean ± SD; pa, 1D vs 2A; pb, 1D vs 2B; pc, 1C vs 2A; pd, 1C vs 2B. ADLS, Schwab and England Activities of Daily Living Scale; EUROHIS-QOL8, EUROHIS-QOL 8-item index; PDQ-39SI, 39-item Parkinson’s Disease Quality of Life Questionnaire Summary Index. Table 4: Quality of life (PDQ-39SI and EUROHIS-QOL8) and disability (ADLS score) in patients with stages 2C, 2D, 3A, or 3B of the HY- NMSB scale. 2C, N � 93 2D, N � 91 3A, N � 6 3B, N � 9 pa pb pc pd PDQ-39SI 18.5 ± 10.2 31.8 ± 13.8 14.2 ± 10.9 21.5 ± 7.9 0.003 0.029 0.173 0.238 Mobility 17.2 ± 14.9 32 ± 2.1 27.1 ± 31.2 27.5 ± 16.3 0.372 0.722 0.713 0.048 Activities of Daily Living 18.4 ± 16.4 31.1 ± 23.3 6.9 ± 7.7 25.9 ± 11.7 0.005 0.722 0.081 0.084 Emotional well-being 25.6 ± 20.1 41.7 ± 23.1 15.9 ± 20.8 24.5 ± 19.5 0.014 0.036 0.203 0.953 Stigma 9.3 ± 15.1 22.4 ± 24.4 7.3 ± 15 6.9 ± 14.1 0.109 0.073 0.636 0.749 Social support 9.9 ± 16.7 19.1 ± 21.9 0±0 2.8 ± 4.2 0.015 0.048 0.081 0.526 Cognition 24.4 ± 15.9 35.7 ± 21.2 1 ± 2.6 24.3 ± 13.4 <0.0001 0.109 <0.0001 0.948 Communication 9.5 ± 13.6 18.4 ± 18.7 2.8 ± 6.8 13.9 ± 13.8 0.025 0.633 0.183 0.226 Pain and discomfort 30.9 ± 19.6 46.1 ± 24.6 34.7 ± 22.6 28.7 ± 19.6 0.209 0.031 0.830 0.673 PQ-10 7 ± 1.4 6.2 ± 1.6 8.5 ± 1.5 7.2 ± 1.3 0.003 0.069 0.025 0.620 EUROHIS-QOL8 3.7 ± 0.4 3.3 ± 0.6 3.8 ± 0.6 3.6 ± 0.4 0.048 0.169 0.590 0.377 Quality of life 3.7 ± 0.7 3.4 ± 0.7 4 ± 0.9 3.6 ± 0.5 0.108 0.563 0.462 0.328 Health status 3 ± 0.7 2.6 ± 0.9 3.2 ± 0.7 2.7 ± 0.5 0.134 0.774 0.598 0.139 Energy 3.7 ± 0.7 3.2 ± 0.9 3.8 ± 0.4 3.6 ± 0.5 0.078 0.293 0.553 0.544 Autonomy for ADL 3.4 ± 0.7 3 ± 0.9 3 ± 0.6 3.2 ± 0.7 0.819 0.625 0.124 0.340 Self-esteem 3.6 ± 0.7 3.2 ± 0.9 4 ± 0.9 3.8 ± 0.7 0.083 0.112 0.335 0.696 Social relationships 4 ± 0.7 3.6 ± 0.8 4 ± 0.7 3.9 ± 0.6 0.115 0.322 0.649 0.520 Economic capacity 3.9 ± 0.7 3.5 ± 0.9 4.2 ± 0.7 3.8 ± 1.1 0.064 0.231 0.311 0.855 Habitat 4.3 ± 0.6 3.9 ± 0.7 4.2 ± 0.7 4.1 ± 0.9 0.369 0.255 0.713 0.751 ADLS score 86.5 ± 9.3 81.8 ± 11.5 90 ± 8.9 83.3 ± 10 0.091 0.769 0.421 0.278 FD (%) 9.7 25.3 0 22.2 0.187 0.601 0.556 0.250 Chi-squared and Mann–Whitney–Wilcoxon test were applied. The results represent percentages or mean ± SD; pa, 2D vs 3A; pb, 2D vs 3B; pc, 2C vs 3A; pd, 2C vs 3B. ADLS, Schwab and England Activities of Daily Living Scale; EUROHIS-QOL8, EUROHIS-QOL 8-item index; PDQ-39SI, 39-item Parkinson’s Disease Quality of Life Questionnaire Summary Index. PD, but this qualification cannot be supported attending the patients with mild NMS burden (A; 39.8%) were the most load of NMS and any domain/s they belong. The NMS frequent in the group with a stage I of H&Y and patients with present in PD may be very variable in number and type, and very severe NMS burden (D; 44.4%) in the group with H&Y they maintain only a moderate association with the motor IV/V; more than 30% of the patients in stage I of H&Y had disturbances [10, 11, 19, 20]. In fact, although as expected, severe or very severe NMS burden. Clinical and 8 Parkinson’s Disease Table 5: COPPADIS study group. Name (last name, first Location Role Contribution name) Astrid Adarmes, Hospital Universitario Virgen del Rocı́o, Sevilla, Evaluation of participants and/ Site investigator Daniela Spain or data management Hospital Universitari Mutua de Terrassa, Terrassa, Neuropsychologist; evaluation Almeria, Marta Site investigator Barcelona, Spain of participants Hospital Álvaro Cunqueiro, Complejo Coordination at the center Alonso Losada, Maria Hospitalario Universitario de Vigo (CHUVI), Site investigator /PI Evaluation of participants and/ Gema Vigo, Spain or data management Alonso Cánovas, Hospital Universitario Ramón y Cajal, Madrid, Evaluation of participants and/ Site investigator Araceli Spain or data management Alonso Frech, Hospital Universitario Clı́nico San Carlos, Evaluation of participants and/ Site investigator Fernando Madrid, Spain or data management Coordination at the center Complejo Hospitalario Universitario de Ferrol Aneiros Dı́az, Ángel Site investigator /PI Evaluation of participants and/ (CHUF), Ferrol, A Coruña, Spain or data management Hospital Universitari Mutua de Terrassa, Terrassa, Evaluation of participants and/ Álvarez, Ignacio Site investigator Barcelona, Spain or data management Coordination at the center Hospital General Universitario de Elche, Elche, Álvarez Sauco, Marı́a Site investigator /PI Evaluation of participants and/ Spain or data management Complejo Asistencial Universitario de Burgos, Evaluation of participants and/ Arnáiz, Sandra Site investigator Burgos, Spain or data management Hospital Universitari Mutua de Terrassa, Terrassa, Neuropsychologist; evaluation Arribas, Sonia Site investigator Barcelona, Spain of participants Ascunce Vidondo, Complejo Hospitalario de Navarra, Pamplona, Evaluation of participants and/ Site investigator Arancha Spain or data management Hospital Universitari Mutua de Terrassa, Terrassa, Evaluation of participants and/ Aguilar, Miquel Site investigator Barcelona, Spain or data management Consorci Sanitari Integral, Hospital General de L Coordination at the center Ávila Rivera, Maria ´Hospitalet, L´Hospitalet de Llobregat, Barcelona, Site investigator /PI Evaluation of participants and/ Asunción Spain or data management Bernardo Lambrich, Hospital de Tortosa Verge de la Cinta (HTVC), Evaluation of participants and/ Site investigator Noemı́ Tortosa, Tarragona, Spain or data management Evaluation of participants and/ Bejr-Kasem, Helena Hospital de Sant Pau, Barcelona, Spain Site investigator or data management Blázquez Estrada, Hospital Universitario Central de Asturias, Site investigator Evaluation of participants Marta Oviedo, Spain Botı́ González, Maria Hospital Universitari Mutua de Terrassa, Terrassa, Neuropsychologist; evaluation Site investigator Ángeles Barcelona, Spain of participants Coordination at the center Borrué, Carmen Hospital Infanta Sofı́a, Madrid, Spain Site investigator /PI Evaluation of participants and/ or data management Buongiorno, Maria Hospital Universitari Mutua de Terrassa, Terrassa, Site investigator Nurse study coordinator Teresa Barcelona, Spain Cabello González, Complejo Hospitalario de Navarra, Pamplona, Site investigator Scheduling of evaluations Carolina Spain Coordination at the center Complejo Hospitalario Universitario de Cabo López, Iria Site investigator /PI Evaluation of participants and/ Pontevedra (CHOP), Pontevedra, Spain or data management Coordination at the center Consorci Sanitari Integral, Hospital Moisés Caballol, Nuria Site investigator /PI Evaluation of participants and/ Broggi, Sant Joan Despı́, Barcelona, Spain. or data management Cámara Lorenzo, Ana Hospital Clı́nic de Barcelona, Barcelona, Spain Site investigator Nurse study coordinator Hospital Universitario Virgen del Rocı́o, Sevilla, Evaluation of participants and/ Carrillo, Fátima Site investigator Spain or data management Carrillo Padilla, Hospital Universitario de Canarias, San Cristóbal Site investigator /PI Coordination at the center Francisco José de la Laguna, Santa Cruz de Tenerife, Spain Complejo Asistencial Universitario de Burgos, Evaluation of participants and/ Casas, Elena Site investigator Burgos, Spain or data management Parkinson’s Disease 9 Table 5: Continued. Name (last name, first Location Role Contribution name) Coordination at the center Hospital Universitario Clı́nico San Carlos, Catalán, Maria Joé Site investigator /PI Evaluation of participants and/ Madrid, Spain or data management Complejo Hospitalario de Navarra, Pamplona, Evaluation of participants and/ Clavero, Pedro Site investigator Spain or data management Complejo Hospitalario Universitario de Ferrol Coordination of blood Cortina Fernández, A Site investigator (CHUF), Ferrol, A Coruña, Spain extractions Evaluation of participants and/ Cosgaya, Marina Hospital Clı́nic de Barcelona, Barcelona, Spain Site investigator or data management Institut d’Assistència Sanitària (IAS) - Instituı́ Evaluation of participants and/ Cots Foraster, Anna Site investigator Cátala de la Salud. Girona, Spain or data management Evaluation of participants and/ Crespo Cuevas, Ane Hospital del Mar, Barcelona, Spain. Site investigator or data management Coordination at the center Complejo Asistencial Universitario de Burgos, Cubo, Esther Site investigator /PI Evaluation of participants and/ Burgos, Spain or data management Nurse study coordinator De Deus Fonticoba, Complejo Hospitalario Universitario de Ferrol Site investigator Evaluation of participants and/ Teresa (CHUF), Ferrol, A Coruña, Spain or data management Coordination at the center Hospital Universitario Vall d´Hebron, Barcelona, De Fábregues, Oriol Site investigator /PI Evaluation of participants and/ Spain or data management Hospital Universitari Mutua de Terrassa, Terrassa, Evaluation of participants and/ Dı́ez Fairen, M Site investigator Barcelona, Spain or data management Complejo Hospitalario de Navarra, Pamplona, Evaluation of participants and/ Erro, Elena Site investigator Spain or data management Coordination at the center Hospital de Tortosa Verge de la Cinta (HTVC), Escalante, Sonia Site investigator /PI Evaluation of participants and/ Tortosa, Tarragona, Spain or data management Institut d’Assistència Sanitària (IAS) - Instituı́ Evaluation of participants and/ stelrich Peyret, Elena Site investigator Cátala de la Salud. Girona, Spain or data management Fernández Guillán, Complejo Hospitalario Universitario de Ferrol Site investigator Neuroimaging studies Noelia (CHUF), Ferrol, A Coruña, Spain Complejo Asistencial Universitario de Burgos, Evaluation of participants and/ Gámez, Pedro Site investigator Burgos, Spain or data management Evaluation of participants and/ Gallego, Mercedes Hospital La Princesa, Madrid, Spain Site investigator or data management Coordination at the center Centro Neurológico Oms 42, Palma de Mallorca, Garcı́a Caldentey, Juan Site investigator /PI Evaluation of participants and/ Spain or data management Garcı́a Campos, Hospital Universitario Virgen Macarena, Sevilla, Evaluation of participants and/ Site investigator Cristina Spain or data management Coordination at the center Garcı́a Moreno, Jose Hospital Universitario Virgen Macarena, Sevilla, Site investigator /PI Evaluation of participants and/ Manuel Spain or data management Coordination at the center Complejo Hospitalario de Navarra, Pamplona, Gastón, Itziar Site investigator /PI Evaluation of participants and/ Spain or data management Complejo Hospitalario Universitario de Neuropsychologist; evaluation Guillén Fopiani, Desiré Site investigator Pontevedra (CHOP), Pontevedra, Spain of participants Gómez Garre, Marı́a Hospital Universitario Virgen del Rocı́o, Sevilla, Site investigator Genetic studies coordination del Pilar Spain Gómez Mayordomo, Evaluation of participants and/ Hospital Clı́nico San Carlos, Madrid, Spain Site investigator Vı́ctor or data management Institut d’Assistència Sanitària (IAS) - Instituı́ Evaluation of participants and/ González Aloy, Javier Site investigator Cátala de la Salud. Girona, Spain or data management González Aramburu, Hospital Universitario Marqués de Valdecilla, Evaluation of participants and/ Site investigator Isabel Santander, Spain or data management 10 Parkinson’s Disease Table 5: Continued. Name (last name, first Location Role Contribution name) Coordination at the center González Ardura, Hospital Universitario Lucus Augusti (HULA), Site investigator /PI Evaluation of participants and/ Jessica Lugo, Spain or data management González Garcı́a, Hospital La Princesa, Madrid, Spain Site investigator Nurse study coordinator Beatriz González Palmás, Complejo Hospitalario Universitario de Evaluation of participants and/ Site investigator Maria Josefa Pontevedra (CHOP), Pontevedra, Spain or data management González Toledo, Hospital Universitario de Canarias, San Cristóbal Evaluation of participants and/ Site investigator Gabriel Ricardo de la Laguna, Santa Cruz de Tenerife, Spain or data management Complejo Hospitalario Universitario de Ferrol Laboratory analysis Golpe Dı́az, Ana Site investigator (CHUF), Ferrol, A Coruña, Spain coordination Consorci Sanitari Integral, Hospital Moisés Evaluation of participants and/ Grau Solá, Mireia Site investigator Broggi, Sant Joan Despı́, Barcelona, Spain or data management Hospital Universitari Mutua de Terrassa, Terrassa, Evaluation of participants and/ Guardia, Gemma Site investigator Barcelona, Spain or data management Coordination at the center Hospital Universitario Vall d´Hebron, Barcelona, Hernández Vara, Jorge Site investigator /PI Evaluation of participants and/ Spain or data management Neuropsychologist; evaluation Horta Barba, Andrea Hospital de Sant Pau, Barcelona, Spain Site investigator of participants Idoate Calderón, Complejo Hospitalario Universitario de Neuropsychologist; evaluation Site investigaor Daniel Pontevedra (CHOP), Pontevedra, Spain of participants Coordination at the center Hospital Universitario Marqués de Valdecilla, Infante, Jon Site investigator /PI Evaluation of participants and/ Santander, Spain or data management Hospital Universitario Virgen del Rocı́o, Sevilla, Evaluation of participants and/ Jesús, Silvia Site investigator Spain or data management Coordination at the center Kulievsky, Jaime Hospital de Sant Pau, Barcelona, Spain Site investigator /PI Evaluation of participants and/ or data management Coordination at the center Kurtis, Mónica Hospital Ruber Internacional, Madrid, Spain Site investigator /PI Evaluation of participants and/ or data management Hospital Álvaro Cunqueiro, Complejo Evaluation of participants and/ Labandeira, Carmen Hospitalario Universitario de Vigo (CHUVI), Site investigator or data management Vigo, Spain Labrador Espinosa, Hospital Universitario Virgen del Rocı́o, Sevilla, Site investigator Neuroimaging data analysis Miguel Ángel Spain Complejo Hospitalario de Navarra, Pamplona, Evaluation of participants and/ Lacruz, Francisco Site investigator Spain or data management Complejo Hospitalario Universitario de Evaluation of participants and/ Lage Castro, Melva Site investigator Pontevedra (CHOP), Pontevedra, Spain or data management Coordination at the center Hospital Universitario Son Espases, Palma de Legarda, Inés Site investigator /PI Evaluation of participants and/ Mallorca, Spain or data management Evaluation of participants and/ López Ariztegui, Nuria Complejo Hospitalario de Toledo, Toledo, Spain Site investigator /PI or data management López Dı́az, Luis Evaluation of participants and/ Hospital Da Costa de Burela, Lugo, Spain Site investigator Manuel or data management Coordination at the center López Manzanares, Hospital La Princesa, Madrid, Spain Site investigator /PI Evaluation of participants and/ Lydia or data management Complejo Hospitalario Universitario de Ferrol López Seoane, Balbino Site investigator Neuroimaging studies (CHUF), Ferrol, A Coruña, Spain Hospital Universitario Vall d´Hebron, Barcelona, Evaluation of participants and/ Lucas del Pozo, Sara Site investigator Spain or data management Evaluation of participants and/ Macı́as, Yolanda Fundación Hospital de Alcorcón, Madrid, Spain Site investigator or data management Parkinson’s Disease 11 Table 5: Continued. Name (last name, first Location Role Contribution name) Evaluation of participants and/ Mata, Marina Hospital Infanta Sofı́a, Madrid, Spain Site investigator or data management Hospital Universitario Vall d´Hebron, Barcelona, Evaluation of participants and/ Martı́ Andres, Gloria Site investigator Spain or data management Coordination at the center Martı́, Maria José Hospital Clı́nic de Barcelona, Barcelona, Spain Site investigator /PI Evaluation of participants and/ or data management Coordination at the center Martı́nez Castrillo, Hospital Universitario Ramón y Cajal, Madrid, Site investigator /PI Evaluation of participants and/ Juan Carlos Spain or data management Martinez-Martin, Centro Nacional de Epidemiologı́a y CIBERNED, Collaborator in statistical Methods and statistical reviewer Pablo Instituto de Salud Carlos III. Madrid and methods analysis Collaborator in english McAfee, Darrian University of Pennsylvania, Philadelphia English style reviewer style Evaluation of participants and/ Meitı́n, Maria Teresa Hospital Da Costa de Burela, Lugo, Spain Site investigator or data management Coordination at the center Menéndez González, Hospital Universitario Central de Asturias, Site investigator /PI Evaluation of participants and/ Manuel Oviedo, Spain or data management Méndez del Barrio, Hospital Universitario Virgen del Rocı́o, Sevilla, Evaluation of participants and/ Site investigator Carlota Spain or data management Coordination at the center Hospital Universitario Virgen del Rocı́o, Sevilla, Mir, Pablo Site investigator /PI Evaluation of participants and/ Spain or data management Miranda Santiago, Complejo Asistencial Universitario de Burgos, Evaluation of participants and/ Site investigator Javier Burgos, Spain or data management Morales Casado, Maria Evaluation of participants and/ Complejo Hospitalario de Toledo, Toledo, Spain. Site investigator Isabel or data management Moreno Diéguez, Complejo Hospitalario Universitario de Ferrol Site investigator Neuroimaging studies Antonio (CHUF), Ferrol, A Coruña, Spain Coordination at the center Nogueira, Vı́ctor Hospital Da Costa de Burela, Lugo, Spain Site investigator /PI Evaluation of participants and/ or data management Complejo Hospitalario Universitario de Ferrol Novo Amado, Alba Site investigator Neuroimaging studies (CHUF), Ferrol, A Coruña, Spain Hospital Universitario Puerta de Hierro, Madrid, Evaluation of participants and/ Novo Ponte, Sabela Site investigator Spain. or data management Hospital Rey Juan Carlos, Madrid, Spain, Madrid, Evaluation of participants and/ Ordás, Carlos Site investigator Spain. or data management Evaluation of participants and/ Pagonabarraga, Javier Hospital de Sant Pau, Barcelona, Spain Site investigator or data management Evaluation of participants and/ Isabel Pareés Hospital Ruber Internacional, Madrid, Spain Site investigator or data management Evaluation of participants and/ Pascual-Sedano, Berta Hospital de Sant Pau, Barcelona, Spain Site investigator or data management Hospital Universitari Mutade Terrassa, Terrassa, Evaluation of participants and/ Pastor, Pau Site investigator Barcelona, Spain or data management Complejo Hospitalario Universitario de Ferrol Pérez Fuertes, Aı́da Site investigator Blood analysis (CHUF), Ferrol, A Coruña, Spain Hospital Universitario Virgen Macarena, Sevilla, Evaluation of participants and/ Pérez Noguera, Rafael Site investigator Spain or data management Consorci Sanitari Integral, Hospital Moisés Evaluation of participants and/ Planas-Ballvé, Ana Site investigator Broggi, Sant Joan Despı́, Barcelona, Spain or data management Evaluation of participants and/ Planellas, Lluı́s Hospital Clı́nic de Barcelona, Barcelona, Spain Site investigator or data management Institut d’Assistència Sanitària (IAS) - Instituı́ Evaluation of participants and/ Prats, Marian Ángeles Site investigator Cátala de la Salud. Girona, Spain or data management 12 Parkinson’s Disease Table 5: Continued. Name (last name, first Location Role Contribution name) Coordination at the center Prieto Jurczynska, Hospital Rey Juan Carlos, Madrid, Spain, Madrid, Site investigator /PI Evaluation of participants and/ Cristina Spain or data management Coordination at the center Puente, Vı́ctor Hospital del Mar, Barcelona, Spain Site investigator /PI Evaluation of participants and/ or data management Pueyo Morlans, Hospital Universitario de Canarias, San Cristóbal Evaluation of participants and/ Site investigator Mercedes de la Laguna, Santa Cruz de Tenerife, Spain or data management Evaluation of participants and/ Redondo, Nuria Hospital La Princesa, Madrid, Spain Site Investigator or data management Rodrı́guez Méndez, Complejo Hospitalario Universitario de Ferrol Site investigator Blood analysis Luisa (CHUF), Ferrol, A Coruña, Spain Rodrı́guez Pérez, Hospital General Universitario de Elche, Elche, Evaluation of participants and/ Site investigator Amparo Belén Spain or data management Hospital Universitario Virgen del Rocı́o, Sevilla, Roldán, Florinda Site investigator Neuroimaging studies Spain Hospital Universitario Virgen Macarena, Sevilla, Evaluation of participants and/ Ruı́z de Arcos, Marı́a Site investigator Spain. or data management Hospital Universitario Donostia, San Sebastián, Evaluation of participants and/ Ruı́z Martı́nez, Javier Site investigator Spain or data management Hospital Universitario Puerta de Hierro, Madrid, Evaluation of participants and/ Sánchez Alonso, Pilar Site investigator Spain or data management Sánchez-Carpintero, Complejo Hospitalario Universitario de Ferrol Site investigator Neuroimaging studies Macarena (CHUF), Ferrol, A Coruña, Spain Hospital Universitario Ramón y Cajal, Madrid, Evaluation of participants and/ Sánchez Dı́ez, Gema Site investigator Spain or data management Sánchez Rodrı́guez, Hospital Universitario Marqués de Valdecilla, Evaluation of participants and/ Site investigator Antonio Santander, Spain or data management Evaluation of participants and/ Santacruz, Pilar Hospital Clı́nic de Barcelona, Barcelona, Spain Site investigator or data management CHUAC, Complejo Hospitalario Universitario de Coordination of the Santos Garcı́a, Diego Coordinator of the Project A Coruña COPPADIS-2015 Segundo Rodrı́guez, Evaluation of participants and/ Complejo Hospitalario de Toledo, Toledo, Spain Site investigator José Clemente or data management Coordination at the center Complejo Hospitalario Universitario de Seijo, Manuel Site investigator /PI Evaluation of participants and/ Pontevedra (CHOP), Pontevedra, Spain or data management Hospital Universitario Marqués de Valdecilla, Evaluation of participants and/ Sierra, Marı́a Site investigator Santander, Spain or data management Coordination at the center Institut d’Assistència Sanitària (IAS) - Instituı́ Solano, Berta Site investigator /PI Evaluation of participants and/ Cátala de la Salud. Girona, Spain or data management Complejo Hospitalario Universitario de Ferrol Evaluation of participants and/ Suárez Castro, Ester Site investigator (CHUF), Ferrol, A Coruña, Spain or data management Hospital Universitari Mutua de Terrassa, Terrassa, Evaluation of participants and/ Tartari, Juan Pablo Site investigator Barcelona, Spain or data management Evaluation of participants and/ Valero, Caridad Hospital Arnau de Vilanova, Valencia, Spain Site investigator or data management Hospital Universitario Virgen del Rocı́o, Sevilla, Evaluation of participants and/ Vargas, Laura Site investigator Spain or data management Coordination at the center Vela, Lydia Fundación Hospital de Alcorcón, Madrid, Spain Site investigator /PI Evaluation of participants and/ or data management Hospital Universitario Clı́nico San Carlos, Evaluation of participants and/ Villanueva, Clara Site investigator Madrid, Spain or data management Hospital Universitario Son Espases, Palma de Evaluation of participants and/ Vives, Bárbara Site investigator Mallorca, Spain or data management Hospital Universitario de Canarias, San Cristóbal Evaluation of participants and/ Villar, Maria Dolores Site investigator de la Laguna, Santa Cruz de Tenerife, Spain or data management Parkinson’s Disease 13 neuropathological data are now emerging supporting the be in stage II of the H&Y, and introducing the NMS burden will concept of the nonmotor dominant endophenotype [21], help to differentiate the degree of nonmotor affectation, that and it seems necessary in daily practice to know the fre- importantly correlates with QoL perception. In other words, quency and the severity of NMS in PD patients, even in early the results of the present study are applicable for a long time to PD patients, because NMS burden could be significant, and the majority of PD patients, especially in early young PD this one impacts on their QoL and contributes to disability patients. Second, all scales or questionnaires used for assessing [7, 9, 15, 22]. Very recently, two PD subtypes have been motor and NMS are validated except PQ-10 [8, 15]. Third, suggested [23, 24], and it would be of great interest to know NMS were recorded with the NMSS, but specifically, as we if very early PD patients with very severe NMS burden could commented nonmotor fluctuations were not identified [30]. correspond with the body-first (bottom-up) type and those Fourth, the OFF state (12 hours without taking medication) with mild NMS burden with the brain-first (top-down) type. was considered for defining the H&Y stage because it repre- The application of the HY.NMSB scale could have dif- sents a more natural state of the disease less conditioned by the ferent uses: (1) a fast and relatively simple way of knowing the symptomatic effect of the medication. Moreover, in PD pa- motor and nonmotor states of a PD patient, stratifying him/ tients with motor fluctuations, the symptoms during the OFF her into a group (diagnosis value; first visit); (2) to monitor state mostly impact on QoL and autonomy. In any case, the long-term evolution of the patient (prognosis value; previously, similar results applying the HY.NMSB were ob- follow-up visits); (3) to monitor the response of a patient to a served when the H&Y stage was defined during the ON state in specific therapeutic intervention. In fact, the NMSS total score 149 PD patients from the CASINO cohort [8, 31]. In the has been considered as the primary efficacy variable in recent COPPADIS cohort, the results were similar as well when the trials [25], and it is known that some NMS can be improved, H&Y was defined during the ON state in those PD patients with dopaminergic medication or nondopaminergic medi- with motor fluctuations (data not shown). Fifth, the time it cation [26]. In this context, the HY.NMSB could be used for took to administer the HY.BMSB scale was not calculated. defining a specific population or as an outcome parameter in Finally, this is a cross-sectional study, but the aim of the clinical trials. For example, nabilone has very recently COPPADIS-2015 study [12] is to follow-up the cohort for 5 demonstrated to improve NMS in PD patients in a phase 2 years, so changes in HY.NMSB and the relationship with trial [27], being an interesting possibility to identify what changes in other variables could be analyzed. patients changed from a superior stage of the HY.NMSB to an In conclusion, this is the first time that a specific scale inferior stage (e.g., from 2C to 2 B). Finally, the HY-NMSB combing the H&Y stage and the NMSS (HY.NMSB scale) scale could be useful to indirectly estimate the patient’s is applied in PD patients for knowing the relationship perception of QoL and disability. The correlation of H&Y, with the patient’s QoL perception and disability regarding NMSS, and NMS burden with QoL and disability has been the stage. The HY.NMSB scale is simple and reflects the frequently reported [7–9, 22], including in PD patients from degree of patient involvement more accurately than the the COPPADIS cohort [15, 18], but this is the first time that H&Y. Patients with a lower H&Y stage may be more the relationship considering both motor stage (H&Y) and affected if they have a greater NMS burden. These results NMS burden (NMSS) at the same time has been analyzed, and need to be replicated in a larger and well-distributed it is important because the influence of NMS burden on QoL cohort of patients by motor stage. perception is critical. An inherent limitation of the proposed classification (HY.NMSB) is the fact that the classification Appendix according to NMS is carried out taking into account the total NMS burden but without considering what exactly these A. COPPADIS Study Group symptoms are. Importantly, some NMS could help clinical practitioners to identify patients who are at different stages of The authors in the COPPADIS Study Group have been listed the disease, such as hallucinations, fainting, inability to in Table 5. control body sphincters, or believing in unlikely facts [28]. Moreover, and compared with the International Parkinson Abbreviations and Movement Disorder Society─Nonmotor Rating Scale (MDS-NMS) [29], the NMSS collects the patient’s perception ADLS: Schwab and England Activities of Daily about different NMS in the previous 4 weeks but does not Living Scale about nonmotor fluctuations. BDI: Beck depression inventory-II A very important limitation is that our sample is not fully EUROHIS- European Health Interview Survey-Quality representative of the PD population due to inclusion and QOL8: of Life 8 Item-Index exclusion criteria (i.e., age limit, no dementia, no severe FOGQ: Freezing of gait questionnaire comorbidities, and no second line therapies) which subse- H&Y: Hoenh and Yahr quently entails a bias toward early PD. The majority of the NMS: Nonmotor symptoms patients from this cohort were in the stage I or II of the H&Y NMSB: Nonmotor symptoms burden (90.4%), so the same analysis with the proposed classification NMSS: Nonmotor symptoms scale should be carried out in a cohort with more patients in ad- NPI: Neuropsychiatric inventory vanced stages of H&Y. In spite of this and importantly, during PD: Parkinson’s disease the first 5 to 10 years of the disease, many patients with PD will PD-CRS: Parkinson’s Disease Cognitive Rating Scale 14 Parkinson’s Disease PDQ-39SI: 39-Item Parkinson’s Disease Quality of Life Lundbeck, Merz, KRKA, UCB, Pharma, Zambon, Bial, and Questionnaire Summary Index Teva. Solano Vila B has received honoraria for educational PDSS: Parkinson’s Disease Sleep Scale presentations and advice service by UCB, Zambon, Teva, QoL: Quality of life AbbVie, Bial. Álvarez Sauco M has received honoraria for QUIP-RS: Questionnaire for Impulsive-Compulsive educational presentations and advice service by AbbVie, Disorders in Parkinson’s Disease-Rating UCB Pharma, Zambon, Bial, and Teva. Vela L has received Scale honoraria for educational presentations and advice service UPDRS: Unified Parkinson’s Disease Rating Scale by AbbVie, UCB Pharma, Lundbeck, KRKA, Zambon, Bial, VAFS: Visual Analog Fatigue Scale and Teva. Escalante S has received honoraria for educa- VAS pain: Visual Analog Scale Pain. tional presentations and advice service by AbbVie, Zam- bon, and Bial. Cubo E has travel grants from AbbVie, Data Availability Allergan, and Boston; lecturing honoraria from AbbVie and International Parkinson’s Disease Movement Disorder The protocol and the statistical analysis plan are available on Society. Carrillo Padilla F has received honoraria from request. Deidentified participants data are not available for Zambon (SEN Congress assistance). Martı́nez Castrillo JC legal and ethical reasons. has received research support from Lundbeck, Italfarmaco, Allergan, Zambon, Merz, and AbbVie and speaking hon- Conflicts of Interest oraria from AbbVie, Bial, Italfarmaco, Lundbeck, Krka, TEVA, UCB, Zambon, Allergan, Ipsen, and Merz. Sánchez Santos Garcı́a D has received honoraria for educational Alonso P has received honoraria for educational presen- presentations and advice service by AbbVie, UCB Pharma, tations and advice service by AbbVie, UCB Pharma, Lundbeck, KRKA, Zambon, Bial, Italfarmaco, and Teva. Paz Lundbeck, KRKA, Zambon, Bial, and Teva. Alonso Losada González JM has received honoraria for educational pre- MG has received honoraria for educational presentations sentations and/or advice service by UCB Pharma, Lundbeck, and advice service by Zambon and Bial. López Ariztegui N KRKA, and Zambon. Jesús S has received honoraria from has received honoraria for educational presentations and AbbVie, Bial, Merz, UCB, and Zambon and holds the advice service by AbbVie, Italfarmaco, Zambon, and Bial. competitive contract “Juan Rodés” supported by the Insti- Gastón I has received research support from AbbVie and tuto de Salud Carlos III. She has received grants from the Zambon and has served as a consultant for AbbVie, Exelts, Spanish Ministry of Economy and Competitiveness (PI18/ and Zambon. Kulisevsky J has obtained the following: (1) 01898) and the Consejerı́a de Salud de la Junta de Andalucı́a consulting fees: Roche and Zambon; (2) honoraria (e.g., (PI-0459-2018). Aguilar M obtained from UCB and Schwabe lecture fees): Zambon, Teva, Bial, and UCB; (3) research with assistance to a Congress and Nutricia with assistance to funding: Roche, Zambon, Ciberned, Instituto de Sal- a Congress and payment of lecture. Planellas LL has received udCarlos III, and Fundació La Marató De TV3. Blázquez travel bursaries grant from AbbVie. Garcı́a Caldentey J has Estrada M has received honoraria for educational pre- received honoraria for educational presentations and advice sentations and advice service by AbbVie, Abbott, UCB service by Qualigen, Nutricia, AbbVie, Italfarmaco, UCB Pharma, Allergan, Zambon, Bial, and Qualigen. Seijo M has Pharma, Lundbeck, Zambon, Bial and Teva. Caballol N has received honoraria for educational services from KRKA, received honoraria from Bial, Italfarmaco, Qualigen, Zam- UCB, Zambon, and Bial and travel grants from Daiichi and bon, UCB, Teva, and KRKA and sponsorship from Zambon, Roche. Ruiz Martı́nez J has received honoraria for edu- TEVA, and AbbVie for attending medical conferences. cational presentations, attending medical conferences, and Legarda I has received honoraria for educational presen- advice service by AbbVie, UCB Pharma, Zambon, Ital- tations and advice service by AbbVie, UCB Pharma, farmaco, Bial, and Teva. Valero C has received honoraria Zambon, Bial, and Teva. Hernández Vara J has received for educational services from Zambon AbbVie and UCB. travel bursaries and educational grants from AbbVie and has Kurtis M has received honoraria from Bial, the Spanish received honoraria for educational presentations from Neurology Society, and the International and Movement AbbVie, Teva, Bial, Zambon, Italfarmaco, and Sanofi- Disorders Society. de Fábregues O has received honoraria Genzyme. Cabo I has received honoraria for educational for educational presentations and advice service by Bial, presentations and advice service by AbbVie, Zambon, and Zambon, AbbVie, KRKA, and Teva. González Ardura J has Bial. López Manzanares L compensated advisory services, received honoraria for speaking from Italfarmaco, Krka, consulting, research grant support, or speaker honoraria Genzyme, UCB, Esteve, Psyma iberica marketing research from AbbVie, Acorda, Bial, Intec Pharma, Italfarmaco, SL and Ferrer, course grant from Teva, and travel grant Pfizer, Roche, Teva, UCB, and Zambon. Ávila Rivera MA has from Merck. López Dı́az L has received honoraria from received honoraria from Zambon, UCB Pharma, Qualigen, UCB, Lundbeck, and KRKA. Mir P has received honoraria Bial, and Teva and ana sponsorship from Zambon and Teva from AbbVie, Abbott, Allergan, Bial, Merz, UCB, and for attending conferences. Zambon and has received grants from the Spanish Ministry Puente V has served as consultant for AbbVie and of Economy and Competitiveness (PI16/01575) cofounded Zambon and has received grant/research from AbbVie. by ISCIII (Subdirección General de Evaluación y Fomento Garcı́a Moreno JM has received honoraria for educational de la Investigación) and by Fondo Europeo de Desarrollo presentations and advice service by AbbVie, Ital-Pharma, Regional (FEDER), the Consejerı́a de Economı́a, Parkinson’s Disease 15 Innovación, Ciencia y Empleo de la Junta de Andalucı́a References (CVI-02526, CTS-7685), the Consejerı́a de Salud y Bien- estar Social de la Junta de Andalucı́a (PI-0437-2012, PI- [1] C. W. Olanow and J. A. Obeso, “The significance of defining 0471-2013), the Sociedad Andaluza de Neurologı́a, the preclinical or prodromal Parkinson’s disease,” Movement Disorders, vol. 27, no. 5, pp. 666–669, 2012. Jacques and Gloria Gossweiler Foundation, the Fundación [2] M. M. Hoehn and M. D. 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