Extensive Validation of the Pain Disability Index in 3 Groups of Patients With Musculoskeletal Pain

A cross-sectional study design was performed.To validate the pain disability index (PDI) extensively in 3 groups of patients with musculoskeletal pain.The PDI is a widely used and studied instrument for disability related to various pain syndromes, although there is conflicting evidence concerning factor structure, test-retest reliability, and missing items. Additionally, an official translation of the Dutch language version has never been...