Validation of outcome measurement instruments used in a multidisciplinary rehabilitation intervention for patients with chronic inflammatory arthritis: Linking of the International Classification of Functioning, Disability and Health, construct validity and responsiveness to change.
Objective: To determine the validity of 15 standardized instruments frequently used to measure the outcome of chronic arthritis treatment. Methods: Analyses were performed on data collected at a rehabilitation programme (n=216). The outcome measures evaluated were health-related quality of life, global health, pain, physical function and aerobic capacity. The instrument items were linked to the In