2.4. Self-report instruments
Two questionnaires were used to measure hand disability and health status. The Disabilities of the Arm, Shoulder and Hand (DASH) measured upper limb symptoms and functional status. Version 2 of the Medical Outcomes Study Short Form-36 (SF-36v2) measured health status and yields eight scales that are referenced to normative values in the US population and can be collapsed to physical and mental health summary measures.