OBJECTIVES : The ICECAP-A is a measure of capability-well-being for adults, and by focusing on more than health, can extend the evaluative space of economic evaluations. The aim of this study was to translate and culturally adapt the questionnaire into Persian in order to assess the construct validity and reliability of the ICECAP-A in the Iranian general population.

METHODS : In this study, we followed the Beaton’s guidelines for cross-cultural adaptation of self-report measures. Subsequently, the questionnaire was administered to a sample of 1200 members of the general population using a stratified probability sampling method. The construct validity and reliability of the ICECAP-A were evaluated in relation to EQ-5D-5L.

RESULTS : After translation and adaptation of the questionnaire; the term “being settled” changed to “stability” for the Iranian cultural context. A moderate correlation (r=0.48) was found between the ICECAP-A and EQ-5D-5L index scores, and the ICECAP-A scores showed differences across different health and socioeconomic groups. The results of the exploratory factor analysis indicate that two instruments are measuring two different constructs. In terms of reliability, the internal consistency of the measure using Cronbach’s alpha was found to be 0.82 and for test-retest reliability, the ICC was found to be 0.90 for total scores.

CONCLUSIONS

The results of this study show that the Persian version of the ICECAP-A is a valid and reliable questionnaire and can complement EQ-5D measures already used in Iran.