Measuring the ICF components of impairment, activity limitation and participation restriction: an item analysis using classical test theory and item response theory.

ABSTRACT:

Background

The International Classification of Functioning, Disability and Health (ICF) proposes three main health outcomes, Impairment (I), Activity Limitation (A) and Participation Restriction (P), but good measures of these constructs are needed The aim of this study was to use both Classical Test Theory (CTT) and Item Response Theory (IRT) methods to carry out an item analysis to improve measurement of these three components in patients having joint replacement surgery mainly for osteoarthritis (OA).

Methods

A geographical cohort of patients about to undergo lower limb joint replacement was invited to participate. Five hundred and twenty four patients completed ICF items that had been previously identified as measuring only a single ICF construct in patients with osteoar

SUBMITTER: Pollard B 

PROVIDER: S-EPMC2696439 | biostudies-literature | 2009 May

REPOSITORIES: biostudies-literature