Table 2: Unadjusted and adjusted associations between body mass index and physical function measures.

Model 1aModel 2b

BMI coeff ( )Model ( )Model BMI coeff ( )Model ( )Model

Physical function measures
 Six-minute walk−5.16 (<0.0001)109.96 (<0.0001)0.22−5.10 (<0.0001)35.78 (<0.0001)0.35
 Chair stands−0.10 (<0.0001)23.70 (<0.0001)0.06−0.08 (0.0001)13.10 (<0.0001)0.17
 Seated reach−0.36 (<0.0001)39.22 (<0.0001)0.09−0.35 (<0.0001)12.58 (<0.0001)0.16
 Walking velocity−0.009 (<0.0001)59.99 (<0.0001)0.13−0.009 (<0.0001)17.40 (<0.0001)0.21
 Grip strength0.17 (0.007)7.43 (0.007)0.020.16 (0.001)45.20 (<0.0001)0.41

Model 1: unadjusted; it contains only BMI (model df = 1).
Model 2: adjusted for age, gender, race, moderate to vigorous intensity physical activity, and arthritis drug usage (model df = 9).