The International Classification of Functioning, Disability and Health: Development of capacity and performance scales

Josue Almansa, Jose Luis Ayuso-Mateos, Olatz Garin, Somnath Chatterji, Nenad Kostanjsek, Jordi Alonso, Jose Maria Valderas, Alarcos Cieza, Alberto Raggi, Olga Svestkova, Helena Burger, Vittorio Racca, Eduard Vieta, Matilde Leonardi, Montserrat Ferrer

Research output: Contribution to journalArticle

Abstract

Objective: There has been no attempt to obtain a continuous summary measure of disability from the checklist of the International Classification of Functioning, Disability and Health (ICF). Our objective was to assess whether valid scales of Capacity and Performance could be developed from the "Activities and Participation" domain of the ICF checklist. Study Design and Setting: A multicenter, observational study of 1,092 patients with 12 different chronic conditions from five European countries was conducted. Exploratory and confirmatory factor analyses were performed to assess the underlying factor structure. Reliability and validity of the Capacity and Performance scales were evaluated. Construct validity was assessed calculating effect size coefficients between extreme severity groups (discriminant ability). Results: The good fit of the confirmatory factor model supported the global scales of Capacity and Performance and their "Psychosocial" and "Physical" subscales. Reliability was excellent (coefficients = 0.79-0.92). Effect sizes of most conditions were large for the Capacity global scale (0.50-3.05), and slightly lower for the Performance global scale (0.45-2.57). Conclusions: Our findings support the measurement model, reliability, and validity of the Capacity and Performance scales. Summary measures of functioning based on the ICF can be obtained using these scales, which should facilitate their incorporation in clinical and epidemiological studies.

Original languageEnglish
Pages (from-to)1400-1411
Number of pages12
JournalJournal of Clinical Epidemiology
Volume64
Issue number12
DOIs
Publication statusPublished - Dec 2011

Keywords

  • Disability evaluation
  • Factor analysis
  • Health
  • Public health
  • Reliability
  • Validity

ASJC Scopus subject areas

  • Epidemiology

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    Almansa, J., Ayuso-Mateos, J. L., Garin, O., Chatterji, S., Kostanjsek, N., Alonso, J., Valderas, J. M., Cieza, A., Raggi, A., Svestkova, O., Burger, H., Racca, V., Vieta, E., Leonardi, M., & Ferrer, M. (2011). The International Classification of Functioning, Disability and Health: Development of capacity and performance scales. Journal of Clinical Epidemiology, 64(12), 1400-1411. https://doi.org/10.1016/j.jclinepi.2011.03.005