Examination of the Applicability of the Disabilities of the Arm, Shoulder and Hand (DASH) Questionnaire to Patients with Hand Injuries and Diseases Using Rasch Analysis.

The study reveals that some DASH items do not fit the underlying trait that the DASH aims to measure. Further studies using Rasch analysis are needed to compare our findings with results of studies involving other target groups (e.g. patients with injuries of the upper arm and shoulder).