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

7 Citations (Scopus)
124 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
Pages (from-to)687-696
Number of pages10
JournalQuality of life research
Volume31
Early online date31 Aug 2021
DOIs
Publication statusPublished - 1 Mar 2022

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