Journal of obesity. 2012;2012(Article ID 261974).
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 Â± 3543.4. Subjects with a BMI â‰Ą35 took 3355 fewer steps per day independent
of knee pain compared with those with a BMI â‰¤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.