Cross-cultural adaptation and psychometric evaluation of the Singapore version of the Chedoke Arm and Hand Activity

Purpose: To develop a Singapore version of the Chedoke Arm and Hand Activity Inventory (CAHAI) and to estimate the construct validity and inter-rater reliability. Materials and methods: The Translation and Cross-Cultural Adaptation of Objectively Assessed Outcome measure procedure was used to systematically adapt the CAHAI. We recruited 56 adults admitted to an inpatient stroke facility to evaluate the psychometric properties of the Singapore version of the CAHAI. The Singapore version of the CAHAI, Fugl-Meyer Assessment of Upper Extremity (FMA-UE), and the Action Research Arm Test (ARAT) were administered to all participants. We used Spearman's rank correlation coefficients to estimate convergent and discriminative validity, and reliability was estimated using the intra-class correlation coefficient and standard error of measurement. Results: Implementation of the Translation and Cross-Cultural Adaptation of Objectively Assessed Outcome measure procedure resulted in the modification to two test items. The Singapore version of the CAHAI demonstrated convergent validity with the FMA-UE (r_s = 0.87; 95% CI: 0.76, 0.92) and ARAT (r_s = 0.80; 95% CI: 0.63, 0.9). Discriminative validity between the Singapore version of the CAHAI and FMA-UE pain subscale was r_s= 0.42 (95% CI: 0.22, 0.59). Reliability of the Singapore version of the CAHAI was 0.97 (95% CI: 0.94, 0.99) and standard error of measurement of 4.80 points (95% CI: 4.23, 5.55). Conclusion: The Singapore version of the CAHAI demonstrated good validity and reliability, similar to the properties of the original CAHAI. Implications for rehabilitation The Singapore version of the Chedoke Arm and Hand Activity Inventory demonstrates evidence of construct validity and inter-rater reliability. The Singapore version of the Chedoke Arm and Hand Activity Inventory can be used by clinicians and researchers to evaluate function in the affected upper extremity for persons with stroke in Singapore.