Abstract
BackgroundThe International Classification of Functioning, Disability, and Health (ICF) Generic-30 (Rehabilitation) Set is a tool used to assess the functioning of a clinical population in rehabilitation. The ICF Generic-30 consists of nine ICF categories from the component “body functions” and 21 from the component “activities and participation”. This study aimed to develop a rating reference guide for the nine body function categories of the ICF Generic-30 Set using a predefined, structured process and to examine the interrater reliability of the ratings using the rating reference guide.MethodsThe development of the first version of the rating reference guide involved the following steps: (1) a trial of rating patients by several raters; (2) cognitive interviews with each rater to analyze the thought process involved in each rating; (3) the drafting of the rating reference guide by a multidisciplinary panel; and (4) a review by ICF specialists to confirm consistency with the ICF. Subsequently, we conducted a first field test to gain insight into the use of the guide in practice. The reference guide was modified based on the raters’ feedback in the field test, and an inter-rater reliability test was conducted thereafter. Interrater agreement was evaluated using weighted kappa statistics with linear weights.ResultsThe first version of the rating reference guide was successfully developed and tested. The weighted kappa coefficient in the field testing ranged from 0.25 to 0.92. The interrater reliability testing of the rating reference guide modified based on the field test results yielded an improved weighted kappa coefficient ranging from 0.53 to 0.78. Relative improvements in the weighted kappa coefficients were observed in seven out of the nine categories. Consequently, seven out of nine categories were found to have a weighted kappa coefficient of 0.61 or higher.ConclusionsIn this study, we developed and modified a rating reference guide for the body function categories of the ICF Generic-30 Set. The interrater reliability test using the final version of the rating reference guide showed moderate to substantial interrater agreement, which encouraged the use of the ICF in rehabilitation practice.
Highlights
The International Classification of Functioning, Disability, and Health (ICF) Generic-30 (Rehabilitation) Set is a tool used to assess the functioning of a clinical population in rehabilitation
In this study, we developed and modified a rating reference guide for the body function categories of the ICF Generic-30 Set
The interrater reliability test using the final version of the rating reference guide showed mod‐ erate to substantial interrater agreement, which encouraged the use of the ICF in rehabilitation practice
Summary
The International Classification of Functioning, Disability, and Health (ICF) Generic-30 (Rehabilitation) Set is a tool used to assess the functioning of a clinical population in rehabilitation. Since the ICF was endorsed in May 2001, various initiatives have been undertaken to promote its implementation [3,4,5,6,7,8], including the development of ICF core sets based on a multi-modal international and interprofessional process. ICF core sets contain selected categories from the entire classification that can serve as minimum standards for assessing and documenting the functioning and health of individuals with a specific disease or disorder. The ICF generic set ( called ICF Generic-7 Set) consists of seven ICF categories that are considered most relevant for assessing and documenting the functioning of the general population as well as different clinical populations irrespective of health condition, contexts, settings, and purposes [9]. The ICF core sets provide a specification of which domains to assess, they do not stipulate how to assess them
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