Similar to the hand, the association between obesity and hip OA is equivocal. A case-control study that examined BMI at 10-yr intervals in men who had received a hip prosthesis because of OA demonstrated that a BMI greater than one standard deviation above the mean was associated with the development of severe OA (45). Relative weight was only weakly associated with OA of the hips when examining data from 4225 persons in the National Health and Nutrition Examination Survey (46).
Data from the First National Health and Nutrition Examination Survey (NHANES-I) failed to demonstrate an association between obesity and hip OA (47). Additionally, parameters of body composition, such as fat distribution, were not associated with hip OA. No association was demonstrated between BMI in the three decades prior to the onset of hip OA (39). Given these contrasting results, no definitive conclusions can be drawn from the available data examining the possible association between obesity and hip OA. To date, the data indicate that at best, obesity is only weakly associated with OA of the hip.
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