THU0708 Disparity in osteoarthritis knee prevalence- a tale of two cities in iran (TEHRAN) and india (PUNE): findings from who ilar copcord population survey (STAGE I)

Background Radiographs are a major deterrent in population surveys. COPCORD (community oriented program for control of rheumatic diseases), a low infrastructure low cost model. advocates clinical approach (www.copcord.org). Iran and India completed COPCORD surveys during 2000–2010. Tehran (dominantly Muslim Shia ethnic) is 35° N, 51° E, altitude 3907’ and Pune (dominantly Hindu Maratha ethnic) is 18° N,73° E altitude 1817’. Tehran and Pune represent distinct culture and ethnicity but people in both communities sit and squat (ground). Early reports showed an adjusted prevalence of OA knee was 15.3 in Teheran and 3.4 in Pune. Objectives To determine and compare the age gender specific prevalence of knee OA in an urban survey in Iran and India Methods 8145 population (51% women) in Pune and 10 107 population (53% women) in Tehran were screened (convenience sampling). House to house survey (Phase 1) identified respondents with past(last 3 months) and/or current musculoskeletal (MSK) pain (last 7 days). Trained community volunteers interviewed respondents to map MSK pain and disability (Phase 2). Concurrently, rheumatologists examined cases to make a clinical diagnosis (phase 3). 8.1% in Iran and 16.6% in Pune population were aged 65+years. The age-gender structure in both surveys (phase 1) was similar to the respective national census. Current data pertains to clinically diagnosed symptomatic OA knees (No X-Rays). Crude prevalence (95% confidence intervals) rate is shown. Results The prevalence was 15.1 (14.5, 15.9) in Tehran and 5.6 (5.1, 6.1) in Pune (OR=3.15, 95% confidence interval 2.83, 3.52, p P -value P -value Conclusions Based on a unique community model, urban surveys in Iran and India showed an enormous burden of OA knee. Women suffered more. The burden was strikingly high and unprecedented in Iran. Further research of life styles and risk factors is required to improve understanding of OA in the community. Reference [1] Chopra A. The COPCORD world of musculoskeletal pain and arthritis. Rheumatol (Oxford) 2013. Disclosure of Interest None declared