Comparing five depression measures in depressed Chinese patients using item response theory: an examination of item properties measurement precision and score comparability

摘要

BackgroundItem response theory (IRT) has been increasingly applied to patient-reported outcome (PRO) measures. The purpose of this study is to apply IRT to examine item properties (discrimination and severity of depressive symptoms), measurement precision and score comparability across five depression measures, which is the first study of its kind in the Chinese context.