Assessing the reliability and validity of the ICECAP-A instrument in Chinese type 2 diabetes patients

• Published in: Health and quality of life outcomes Vol. 19; no. 1; pp. 5 - 11
• Main Authors: Xiong, Yao, Wu, Hongyan, Xu, Judy
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 06.01.2021; BioMed Central; BMC
• Subjects: Adult; Aged; Asian Continental Ancestry Group - ethnology; China; China - epidemiology; Chinese culture; Chronic illnesses; Community health care; Consent; Correlation analysis; Data collection; Demographic aspects; Diabetes; Diabetes mellitus; Diabetes mellitus (non-insulin dependent); Diabetes Mellitus, Type 2 - psychology; Diagnosis; Disease; EQ-5D-3L; Evaluation; Factor analysis; Female; Health services; Health Status; Humans; ICECAP-A; Male; Middle Aged; Patient outcomes; Patients; Personal health; Population; Preferences; Psychometrics; Psychometrics - instrumentation; Quality of Life; Questionnaires; Regression analysis; Reliability analysis; Reliability aspects; Reproducibility of Results; Sociodemographics; Surveys and Questionnaires; Tariffs; Type 2 diabetes; China; EQ-5D-3L; Psychometrics; Diabetes; China; ICECAP-A
• ISSN: 1477-7525; 1477-7525
• DOI: 10.1186/s12955-020-01632-5

We aimed to conduct psychometric tests for the Chinese version of ICECAP-A and compare the differences between ICECAP-A and EQ-5D-3L for patients with T2DM and explore the relationship between clinical conditions and ICECAP-A through diabetes-related clinical indicators. Data were collected from a sample of 492 Chinese T2DM patients. The reliability and validity of the ICECAP-A were verified. Exploratory factor analysis (EFA), correlation analysis and regression analysis were conducted for both the ICECAP-A and EQ-5D-3L. Our results show that the Chinese version of ICECAP-A has good internal consistency with an overall Cronbach's Alpha coefficient of 0.721. The mean scores of ICECAP-A and EQ-5D-3L are 0.85 vs. 0.94. A weak correlation (r = 0.116) was found between the ICECAP-A tariff and EQ-5D-3L utility. EFA showed that although the five dimensions of the ICECAP-A and EQ-5D-3L scales were loaded into two different factors respectively. However, the two scales captured different dimensions of quality of life and can complement each other. The ICECAP-A, EQ-5D-3L, and EQ-VAS scores showed differences across different socio-demographic characteristics and clinic conditions groups. The Chinese version of the ICECAP-A capability instrument can be for assessing outcomes in adults with T2DM. It may capture more dimensions of QoL than traditional Health-related QoL (HRQoL) instruments and may be useful for economic evaluations of health care and social care for people with T2DM or other chronic diseases.