Abstract

Introduction: Chronic pain is a condition that affectss 1 in every 5 people in the world, compromising different areas of quality of life. The Chronic Pain Graded questionnaire (CPG) was developed as a form to assess and monitor these patients, with high levels of reliability and validity. Objectives: To develop a spanish version of the chronic pain graded questionnaire, culturally adapted to Chile and determine its reliability and convergent construct validity , in the University of Chile Clinical Hospital. Materials and Methods: The chronic pain graded questionnaire was translated and culturally adapted according to international recommendations . It was applied with SF -36 v2.0 questionnaire in 130 patients with chronic musculoskeletal pain (more than 6 months). The reliability was calculated with de Alpha the Cronbach Index and de validity was assessed by comparing the responses of the CPG for each category with the subscales of SF-36 v.2. Results: The Chilean version of the CBDC was valid. High levels of reliability was obtained with Cronbach’s alpha > 0.7. Compared with the SF -36 significant correlations were observed , especially with the SF -36 subscales having high ability to measure pain and physical health ( P < 0.01). Conclusions: The results presented here confirm the reliability and validity of the Chilean version of the chronic pain graded questionnaire in the evaluation of patients with chronic musculoskeletal pain.