The ICECAP-A instrument for capabilities: assessment of construct validity and test–retest reliability in a general Dutch population

Pieter J. Rohrbach, Alexandra E. Dingemans, Brigitte A. Essers, Eric F. van Furth, Philip Spinhoven, Catharina G.M. Groothuis-Oudshoorn, Janine A. van Til, M. Elske van den Akker-van Marle*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Downloads (Pure)

Abstract

Purpose: The ICEpop CAPability measure for Adults (ICECAP-A) assesses five capabilities that are important to one’s well-being. The instrument might be an important addition to generic health questionnaires when evaluating quality of life extending beyond health. This study aimed to conduct a psychometric assessment of the Dutch translation of the ICECAP-A.

Methods: Construct validity of the instrument was assessed in two ways. First, by measuring correlations with the EQ-5D-5L questionnaire and a measure of self-efficacy and, second, by investigating the ability to distinguish between groups known to differ on the construct the ICECAP-A means to capture. Additionally, test–retest reliability was evaluated.

Results: In total, 1002 participants representative of the general Dutch population completed an online survey. For test–retest reliability, 252 participants completed the same questionnaire 2 weeks later. The ICECAP-A indicated moderate to strong correlations with the EQ-5D-5L and a strong correlation with self-efficacy. Furthermore, it was capable of differentiating known groups. Moreover, results indicated adequate test–retest reliability with an intraclass correlation coefficient of 0.79.

Conclusion: In summary, results suggest adequate test–retest reliability and construct validity and indicate that the ICECAP-A might be of added value, especially when considering areas outside of the traditional health intervention model.

Original languageEnglish
Number of pages10
JournalQuality of life research
Early online date31 Aug 2021
DOIs
Publication statusE-pub ahead of print/First online - 31 Aug 2021

Fingerprint

Dive into the research topics of 'The ICECAP-A instrument for capabilities: assessment of construct validity and test–retest reliability in a general Dutch population'. Together they form a unique fingerprint.

Cite this