Inclusion Criteria:  Participants included has work-related musculoskeletal disorders diagnosis and complaints of chronic pain in one or more regions of the body, of different age groups, education levels, income, and occupational status (unemployed, leave work, or is working). Chronic pain is defined as a persistent or recurrent symptom lasting longer than three months.  Exclusion Criteria:  Participants whose main diagnosis was a work-related mental disorder or musculoskeletal complaints related to previous injuries resulting from an accident or typical displacement from work, such as amputations and fractures, were excluded.