METHODS: A cross-sectional study was conducted in two phases: (1) translation and cultural adaptation of the DHI into Malay and (2) evaluation of its psychometric properties. Content validity was assessed by a panel of nine experts using the Content Validity Index (CVI). Face validity was evaluated through a pilot test with 10 individuals with DPN. Internal consistency (Cronbach's alpha) and test-retest reliability (Intraclass Correlation Coefficient, ICC) were measured in 30 participants with DPN. Known-group validity was examined by comparing DPN participants with healthy individuals.
RESULTS: The content validity of the Malay-DHI was excellent and face validity confirmed that the Malay-DHI was clear and comprehensible. Internal consistency was strong across all categories (α = 0.84-0.97). Test-retest reliability demonstrated excellent stability (ICC = 0.996-1.000). Known-group validity showed a significant difference between individuals with DPN and healthy individuals (Z = -6.93, p < .001).
CONCLUSION: The Malay version of the DHI demonstrated strong validity and reliability, making it a culturally relevant and robust tool for assessing hand function in individuals with DPN. This tool may facilitate targeted rehabilitation interventions and improve clinical outcomes.