Risk Factors Associated with Osteoarthritis of the Knee: Studied Cases in Maharat Nakhon Ratchasima Hospital
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Abstract: A hospital-based case-control study of the risk factors associated with osteoarthritis of the knee was conducted at Maharat Nakhon Ratchasima Hospital during August to September 1999. Cases were 210 patients with osteoarthritis of the knee and 210 controls who had other orthopedic conditions, aged 45 years or more who were registered at an orthopedic clinic. The information were collected by direct interviewing, using a structured questionnaire which included information regarding socio-demographic, BMI health history and health related behavior. The association between risk factors and osteoarthritis of the knee was analysed by the multiple logistic regression to control for the effects of age and gender. The results showed that a body mass index of 25.0 to 29.9 kg/m2 and > 30.0 kg/m2 increased the risk by 2.27 times (95% CI = 2.71 to 19.80 and 6.75 …… 95% CI = 2.71 to 16.80). Sitting postures such as kneeling, squatting, and Thai traditional sitting longer than 6 hours/week increased the risk by 20.90 times (95% CI = 2.77 to 40.80), 16.62 times (95% CI = 9.36 to 29.48) and 4.86 times (95% CI = 2.77 to 8.54), respectively. To reduce the risk of osteoarthritis of the knee, sitting postures such as kneeling, squatting, and Thai traditional sitting for ling duration should be avoided. Weight should be controlled to an optimal level.
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