Content validity and reliability of the international classification of functioning, disability and health for falls (Thai version) in stroke patients

Abstract

Objective of this study to evaluate content validity and reliability of the modified ICF core set for falls that based on a study of Yen TH et al., in 2014, they linked the fall-related risk factors to the ICF categories that using specified ICF linking rules. This ICF core set was developed as a Thai version of the ICF core set for falls in this study. The ICF core sets for falls consisted all of 34 categories. Five experts assessed the content validity of this ICF and remain 31 in 34 categories. Results of an item content validity index (I-CVI) were 0.8 and 1, and the scale content validity index (S-CVI)was 8.6.That were very good content validity level. Thirty persons with stroke patient’s mean age 57.6±7.8 years old were evaluated the ICF core set for falls (Thai version) by an assessor for two times, these testing apart one week. The intra-class correlation coefficients: ICC in domains of the body function and body structure were 0.95 (95%CI: 0.92 - 0.97, p-value< 0.0001)and 1.00 (95%CI: 1, p-value< 0.0001), respectively. It was very good reliability. The ICC of the activity and participation domains were 0.85 (95%CI: 0.761-0.920, p-value< 0.0001) and the environment factors were 0.79 (95%CI: 0.674-0.884, p-value< 0.0001) that was good reliability. Conclusion, the ICF core set for falls (Thai version) to develop for the study is acceptable. Future studies of this ICF model should be developed to be more convenient.  Evaluation in other patient groups, and different social contexts should be also studied, addition to the inter-rater test between assessors.