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Validity of ICD-9 and ICD-10 codes used to identify acute liver injury : A study in three European data sources
Forns, Joan (RTI Health Solutions)
Cainzos-Achirica, Miguel (RTI Health Solutions)
Hellfritzsch, Maja (Clinical Pharmacology and Pharmacy. Department of Public Health. University of Southern Denmark)
Morros, Rosa (Universitat Autònoma de Barcelona)
Poblador-Plou, Beatriz (Instituto Aragonés de Ciencias de la Salud)
Hallas, Jesper (Clinical Pharmacology and Pharmacy. Department of Public Health. University of Southern Denmark)
Giner-Soriano, Maria (Universitat Autònoma de Barcelona)
Prados-Torres, Alexandra (Instituto Aragonés de Ciencias de la Salud)
Pottegård, Anton (Clinical Pharmacology and Pharmacy. Department of Public Health. University of Southern Denmark)
Cortés, Jordi (Universitat Politècnica de Catalunya. Departament d'Estadística i Investigació Operativa)
Castellsague, Jordi (RTI Health Solutions)
Jacquot, Emmanuelle (Pharmacoepidemiology Department. Les Laboratoires Servier)
Deltour, Nicolas (Pharmacoepidemiology Department. Les Laboratoires Servier)
Perez-Gutthann, S (RTI Health Solutions)
Pladevall-Vila, Manel (RTI Health Solutions)

Data: 2019
Resum: Purpose: Validating cases of acute liver injury (ALI) in health care data sources is challenging. Previous validation studies reported low positive predictive values (PPVs). Methods: Case validation was undertaken in a study conducted from 2009 to 2014 assessing the risk of ALI in antidepressants users in databases in Spain (EpiChron and SIDIAP) and the Danish National Health Registers. Three ALI definitions were evaluated: primary (specific hospital discharge codes), secondary (specific and nonspecific hospital discharge codes), and tertiary (specific and nonspecific hospital and outpatient codes). The validation included review of patient profiles (EpiChron and SIDIAP) and of clinical data from medical records (EpiChron and Denmark). ALI cases were confirmed when liver enzyme values met a definition by an international working group. Results: Overall PPVs (95% CIs) for the study ALI definitions were, for the primary ALI definition, 84% (60%-97%) (EpiChron), 60% (26%-88%) (SIDIAP), and 74% (60%-85%) (Denmark); for the secondary ALI definition, 65% (45%-81%) (EpiChron), 40% (19%-64%) (SIDIAP), and 70% (64%-77%) (Denmark); and for the tertiary ALI definition, 25% (18%-34%) (EpiChron), 8% (7%-9%) (SIDIAP), and 47% (42%-52%) (Denmark). The overall PPVs were higher for specific than for nonspecific codes and for hospital discharge than for outpatient codes. The nonspecific code "unspecified jaundice" had high PPVs in Denmark. Conclusions: PPVs obtained apply to patients using antidepressants without preexisting liver disease or ALI risk factors. To maximize validity, studies on ALI should prioritize hospital specific discharge codes and should include hospital codes for unspecified jaundice. Case validation is required when ALI outpatient cases are considered.
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. Creative Commons
Llengua: Anglès
Document: Article ; recerca ; Versió publicada
Matèria: Acute liver injury ; Antidepressants ; Pharmacoepidemiology ; Validation
Publicat a: Pharmacoepidemiology and Drug Safety, Vol. 28 Núm. 7 (july 2019) , p. 965-975, ISSN 1099-1557

DOI: 10.1002/pds.4803
PMID: 31172633


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