Association of Body Mass Index with Physical Function and Health-Related Quality of Life in Adults with Arthritis

Table 2

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

	Model 1^a			Model 2^b
	BMI coeff (𝑃)	Model 𝐹 (𝑃)	Model 𝑅^2	BMI coeff (𝑃)	Model 𝐹 (𝑃)	Model 𝑅^2
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 strength	0.17 (0.007)	7.43 (0.007)	0.02	0.16 (0.001)	45.20 (<0.0001)	0.41

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