4.1 Article

Mapping the schizophrenia quality of life scale to EQ-5D, HUI3 and SF-6D utility scores in patients with schizophrenia

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TAYLOR & FRANCIS LTD
DOI: 10.1080/14737167.2023.2215430

关键词

Mapping; crosswalk; betamix; schizophrenia; EQ-5D; HUI; SF-6D; SQLS

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The current study aimed to map the disease-specific Schizophrenia Quality of Life Scale (SQLS) onto generic preference-based instruments (EQ-5D-3 L, EQ-5D-5 L, HUI3, and SF-6D) to inform cost-utility analyses for schizophrenia treatment.
ObjectivesThe current study aimed to map the disease-specific Schizophrenia Quality of Life Scale (SQLS) onto the three- and five-level EuroQol five-dimension (EQ-5D-3 L and EQ-5D-5 L), Health Utility Index Mark 3 (HUI3) and Short Form six-dimensional (SF-6D) preference-based instruments to inform future cost-utility analyses for treatment of patients with schizophrenia.MethodsData from 251 outpatients with schizophrenia spectrum disorders was included for analysis. Ordinary least square (OLS), Tobit and beta regression mixture models were employed to estimate the utility scores. Three regression models with a total of 66 specifications were determined by goodness of fit and predictive indices. Distribution of the original data to the distributions of the data generated using the preferred estimated models were then compared.ResultsEQ-5D-3 L and EQ-5D-5 L were best predicted by the OLS model, including SQLS domain scores, domain-squared scores, age, and gender as explanatory predictors. The models produced the best performance index and resembled most closely with the observed EQ-5D data. HUI3 and SF-6D were best predicted by the OLS and Tobit model respectively.ConclusionThe current study developed mapping models for converting SQLS scores into generic utility scores, which can be used for economic evaluation among patients with schizophrenia.

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