Measurement Properties of the Nepali Version of the Quick-DASH in Patients with Shoulder Pain.

Purpose: To examine the measurement properties of the Nepali version of the Quick-Disabilities of the Arm, Shoulder and Hand (QuickDASH-NP). Materials and methods: The Nepali DASH and Shoulder Pain and Disability Index (SPADI) were completed at baseline assessment, and again at follow-up with the Nepali Global Rating of Change (GROC-NP) score. The 11 items of the QuickDASH-NP were extracted from the DASH and tested for confirmatory factory analysis (CFA), exploratory factor analysis (EFA), internal consistency (alpha), item-total correlation (ITC), test-retest reliability (ICC), measurement errors, hypothesis testing (correlation with DASH and SPADI) and responsiveness (effect size-ES, standardised response mean-SRM). Results: A total of 156 participants completed questionnaires at baseline and 121 at follow-up with all questionnaires valid (no participant leaving more than one question blank). CFA suggested a poor fit for the singlefactor model. The EFA demonstrated two factors with acceptable internal consistency (alpha = 0.79 and 0.75) for each factor. The test-retest reliability was excellent (ICC = 0.94; 95%CI:0.92-0.98), correlation was positive and very strong with the DASH-NP (r = 0.96) and strong with the SPADI-NP (r = 0.81). The Standard Error of Measurement was 2.83 and Smallest Detectable Change 7.84/100. The ES and SRM were moderate to high. Conclusions: The QuickDASH-NP is reliable, valid, and able to detect change in shoulder symptoms among Nepali participants. It offers a short, easy to complete self-reporting tool for clinical use and research.