Reliability and validity of the Thai version of EQ-5D-5Lquestionnaire on patients with chronic disease

Abstract

Background The EuroQoL Group's 5-dimension, 5-level (EQ-5D-5L) is a frequently used questionnaire on generic health-related quality of life (HRQoL); however, studies on its psychometric properties in Thailand are rare, especially on patients with chronic diseases. Objective To evaluate the reliability and validity of the EQ-5D-5L questionnaire on patients with chronic diseases. Research design Cross-sectional study. Setting King Chulalongkorn Memorial Hospital. Methods Four hundred outpatients with chronic disease at King Chulalongkorn Memorial Hospital between July 2014 and February 2015 were surveyed. The psychometric properties of EQ-5D-5L were evaluated in terms of practicality (administration time and ceiling effect), reliability and validity (known-groups validity and convergent validity).