Background: Chronic pain (CP) is a noticeable condition, compromising individual and societal wellbeing. Population-based studies provide valuable epidemiological information for addressing health problems. The aim of this study was to provide best-evidence epidemiological and population-based information for developing and targeting CP management interventions, conducted investigation about prevalence CP among residents of Shiraz, Iran. Methods: The study was conducted as a cross-sectional, face-to-face interview survey. A sample of 1050 adults aged ≥ 18 was selected through a multistage stratified cluster method. CP was defined as presence of pain for at least six months, last experience of pain earlier than one month ago, frequency of pain equal to or greater than twice weekly and the intensity of last experienced pain ≥ 5 on a 10-point Numerical Rating Scale (NRS). Results: The prevalence of CP was 6.95% (73/1050). The mean age of CP cases was 44.42 years (range 22-64 years) and the male/female ratio was 34.2%/65.8%. Also, 81% and 19% of CP individuals reported a moderate (NRS = 5-7) and sever (NRS = 8-10) pain orderly. In 63% the pain at its worst was so severe that they could not tolerate any more. The involvement of musculoskeletal system was predominant; 34% and 11% had pain in two and three location of body. A statistically significant relationship was shown only between CP and gender (P < 0.001). Conclusions: CP as an important emerging health problem deserving more attention and prioritization in Iran health care system.

Keywordschronic pain, cross-sectional studies, iran, prevalence.