The Association of Obesity with Walking Independent of Knee Pain: The Multicenter Osteoarthritis Study

Department of Physical Therapy and Athletic Training, College of Health and Rehabilitation Sciences: Sargent College, Boston University, Boston, MA 02115, USA.
Journal of obesity 05/2012; 2012(1):261974. DOI: 10.1155/2012/261974
Source: PubMed


Practice guidelines recommend addressing obesity for people with knee OA, however, the association of obesity with walking independent of pain is not known. We investigated this association within the Multicenter Osteoarthritis Study, a cohort of older adults who have or are at high risk of knee OA. Subjects wore a StepWatch to record steps taken over 7 days. We measured knee pain from a visual analogue scale and obesity by BMI. We examined the association of obesity with walking using linear regression adjusting for pain and covariates. Of 1788 subjects, the mean steps/day taken was 8872.9 ± 3543.4. Subjects with a BMI ≥35 took 3355 fewer steps per day independent of knee pain compared with those with a BMI ≤25 (95% CI -3899, -2811). BMI accounted for 9.7% of the variability of walking while knee pain accounted for 2.9%. BMI was associated with walking independent of knee pain.

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    • "Meanwhile, BMI turned to be an independent predictor of the score when comparing the two intervention groups, which further confirms its role in the symptoms of OA. The finding is in agreement with White et al. [35] whose study demonstrated that BMI is an important and significant predictor of walking independent of knee pain in OA patients. Its effect is even more important than the knee pain itself on walking. "
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