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Abstract Objective To investigate the incidence and risk factors of knee osteoarthritis in Kirgiz population in Akqi.Methods Samples were selected randomly from Kirgiz residents in Akqi.All of them fulfilled questionnaires at home，and those who had pain at knee within one month were examined with X-ray.SPSS 18.0 was used to analyze the data.Results 1 498 Kirgizes were included in the study，and the incidence of KOA in Akqi is 37.18％.The incidence in pastoral areas was higher than that in city，while the incidence in female was higher than that in male.These differences were statisticly significant (P＜0.05).Cold weather，climbing hills，working in squat position and kneeling may be risk factors of KOA.Conclusion The incidence of KOA of those Kirgizes who were above 40 years old in Akqi is 37.18％.Cold weather，climbing hills，working in squat position and kneeling may be risk factors of KOA.
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