alexa The association of knee injury and obesity with unilateral and bilateral osteoarthritis of the knee.
Orthopaedics

Orthopaedics

Journal of Arthritis

Author(s): Davis MA, Ettinger WH, Neuhaus JM, Cho SA, Hauck WW

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Abstract The strength of the associations of knee injury and obesity with osteoarthritis of the knee was studied for 3,885 adults aged 45-74 years who received knee x-rays in the First National Health and Nutrition Examination Survey, 1971-1975. Bilateral osteoarthritis was more prevalent (5\%) than unilateral osteoarthritis (2\%). Bilateral osteoarthritis was twice as prevalent in women as in men; however, there was no sex difference in the prevalence of unilateral osteoarthritis. Odds ratios calculated by means of polychotomous logistic regression indicated that obesity, knee injury, and age were significantly associated with both unilateral and bilateral knee osteoarthritis. Obesity was a stronger predictor of bilateral osteoarthritis than was knee injury (odds ratio (OR) = 6.6 for obesity, 3.5 for right knee injury, and 3.0 for left knee injury; 95\% confidence interval (CI) 4.71-9.18, 1.80-6.83, and 1.51-6.11, respectively). Knee injury was a stronger predictor of unilateral osteoarthritis than was obesity (OR = 3.4 and 2.4 for obesity in the right and left knee, respectively (95\% CI 1.55-7.29 and 0.96-5.75) and OR = 16.3 and 10.9 for injury in the right and left knee, respectively (95\% CI 6.50-40.89 and 3.72-31.93]. These findings suggest that different pathogenetic processes may exist for unilateral and bilateral knee osteoarthritis.
This article was published in Am J Epidemiol and referenced in Journal of Arthritis

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