Prevalence Study Of Primary Knee Osteoarthritis In The Elderly People Of Urban And Rural Areas In Central Region Of Hunan Province

Objective:To estimate the prevalence and severity of primary knee osteoarthritis in the elderly people of urban and rural areas in Hunan province, and discuss the risk factors of knee osteoarthritis.Method:Using stratified-cluster-multistage sampling method, the central region of Hunan Province (Loudi, Shaoyang and Yiyang) were divided into two layers which are urban and rural areas, and then randomly selected two community committees in a district (town). The research was door-to-door surveys to investigate demographic data of the local residents and the condition of the primary knee osteoarthritis. Establishing a database with Epidata3.0, analysis data was used the chi-square test and logistic regression analysis and other statistical methods with SPSS18.0and Excel2007software.Result:The sample were531cases. The urban areas were292cases and rural areas were239cases. The total prevalence of primary knee osteoarthritis in elderly people in central region of Hunan province is20.3%. The prevalence in urban areas was16.3%and23.6%in rural areas. The severity of women patients was more serious than men, and the statistics had significant statistically(P<0.01); the severity of old patients was more serious than younger, and the statistics had significant statistically(P<0.05); the severity of rural patients was more serious than urban, and the statistics had significant statistically(P<0.05); the severity of higher body mass index patients was more serious, and the statistics had significant statistically(P<0.01); the severity of heavier works patients was more serious, and the statistics had significant statistically(P <0.05); the severity of smoker patients was more serious than non-smoker, and the statistics had significant statistically(P<0.01). Sex, body mass index, labor intensity and long-term residence were the risk factors of primary knee osteoarthritis in elderly people in central region of Hunan province.Conclusion:1. The prevalence of primary knee osteoarthritis in elderly people of urban and rural areas in central region of Hunan province is20.3%. The prevalence in urban areas is16.3%and23.6%in rural areas.2. The disease is common in women, obese people, rural population and high labor intensity crowd.3. The severity of female, old people, rural areas, obesity, high labor intensity and smoking patients with knee OA is worse.