Convergent and discriminative validity of the Frail-VIG index with the EQ-5D-3L in people cared for in primary health care
Zamora-Sánchez, Juan-José (Universitat de Barcelona. Escola d'Infermeria)
Zabaleta del Olmo, Edurne (Universitat Autònoma de Barcelona)
Gea-Caballero, Vicente (Instituto de Investigación Sanitaria La Fe)
Julián-Rochina, Iván (Universitat de València)
Pérez-Tortajada, Gemma (Institut Català de la Salut. Gerència d'Àmbit d'Atenció Primària Barcelona Ciutat)
Amblàs-Novellas, Jordi (Universitat de Vic)

Data:	2021
Resum:	The Frail-VIG frailty index has been developed recently. It is an instrument with a multidimensional approach and a pragmatic purpose that allows rapid and efficient assessment of the degree of frailty in the context of clinical practice. Our aim was to investigate the convergent and discriminative validity of the Frail-VIG frailty index with regard to EQ-5D-3L value. We carried out a cross-sectional study in two Primary Health Care (PHC) centres of the Catalan Institute of Health (Institut Català de la Salut), Barcelona (Spain) from February 2017 to January 2019. Participants in the study were all people included under a home care programme during the study period. No exclusion criteria were applied. We used the EQ-5D-3L to measure Health-Related Quality of Life (HRQoL) and the Frail-VIG index to measure frailty. Trained PHC nurses administered both instruments during face-to-face assessments in a participant's home during usual care. The relationships between both instruments were examined using Pearson's correlation coefficient and multiple linear regression analyses. Four hundred and twelve participants were included in this study. Frail-VIG score and EQ-5D-3L value were negatively correlated (r = − 0. 510; P < 0. 001). Non-frail people reported a substantially better HRQoL than people with moderate and severe frailty. EQ-5D-3L value declined significantly as the Frail-VIG index score increased. Frail-VIG index demonstrated a convergent validity with the EQ-5D-3L value. Its discriminative validity was optimal, as their scores showed an excellent capacity to differentiate between people with better and worse HRQoL. These findings provide additional pieces of evidence for construct validity of the Frail-VIG index.
Nota:	Funding: This research was supported by the Health Department grant number (SLT008/18/00011) from the Generalitat of Catalunya (Spain) and by a grant from the Territorial Management of Barcelona of the Institut Català de la Salut (Catalan Institute of Health) to the first author (JJZS) in the 2018 edition.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Frailty ; Health status ; Primary health care ; Psychometrics ; Validation studies as topic
Publicat a:	BMC geriatrics, Vol. 21 (april 2021) , ISSN 1471-2318

DOI: 10.1186/s12877-021-02186-x
PMID: 33849481

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