Epidemiology and risk factors of patellofemoral osteoarthritis in adults: a population-based study in southern Thailand
Tangtrakulwanich, B.; Suwanno, P.
Journal of the Medical Association of Thailand 95(8): 1048-1052
2012
ISSN/ISBN: 0125-2208 PMID: 23061309 Document Number: 12425
Study the epidemiology and factors associated with patellofemoral osteoarthritis. A population-based survey was undertaken in Songkhla, a province in the southern part of Thailand. Residents aged 40 years and older were sampled using primary care units as a primary sampling frame, stratified by age and sex. All participants were taken to a private clinic for an interview and radiographic examination, including anterior-posterior, lateral and skyline views of both knees. Types and severities of involvement in each compartment were graded by one musculoskeletal radiologist. Of the eligible 694 subjects, 576 (81.4%) agreed to participate in the present study. The prevalence of radiographic patellofemoral osteoarthritis was 37.9%, of which 96% was bilateral involvement. Isolated patellofemoral osteoarthritis was the most common pattern in males (18.0%), while the combined pattern (involvement of both tibiofemoral and patellofemoral compartments) was the most common pattern in females (31.2%). Elderly (OR = 8.8, 95% CI: 5.1-15.3) and obese (OR = 7.9, 95% CI: 3.3-15.3) were independent risk factors predicting patellofemoral osteoarthritis. There was a high prevalence of patellofemoral osteoarthritis among Thais over 40 years of age, associated with age and obesity.
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