The Validity, Reliability and Internal Consistency of the Cross-Cultural Adaptation of the FIL-DASH (Filipino Version of the Disability of the Arm, Shoulder and Hand) Questionnaire in Patients with Traumatic Brachial Plexus Injuries.

The objective of this paper was to determine the validity, reliability and internal consistency of the translated FILIPINO DASH (FIL-DASH) questionnaire in patients with traumatic brachial plexus injuries. Thirty-five adult patients with traumatic brachial plexus injury were enrolled in the validation stage. The same questionnaire was given to the patient between 7 to 14 days for the . The validated Filipino version of the SF-36 was used as the gold standard to determine the construct validity of the translated DASH. We also compared the DASH score with the SF-36 total and subscale, validated Brief Pain Inventory Severity and Interference Scale and the Visual Acuity Scale (VAS) for Pain. The internal consistency was adequate, with Cronbach's Alpha for the 30 items of 0.93 and an average inter-item covariance of 0.399. The test-retest reliability was 0.87 ( < 0.001). There was no significant difference in establising the validity of the translated DASH against SF-36 total and Subscale, validated Brief Pain Inventory Severity and Interference Scale and the Visual Analogue Scale (VAS). The translated DASH (FIL-DASH) questionnaire was internally consistent and showed no difference in testing for test-retest reliability and validity against functional outcome measures and pain scales validated for adult Filipinos.