Table 2.

Association of body composition with the DAS28 score

Variable	DAS28
	Male						Female
	Unadjusted β	SE	p	Adjusted β	SE	p value	Unadjusted β	SE	p value	Adjusted β	SE	p value
Age	0.002	0.012	0.889	NA			0.015	0.006	0.009
Disease duration, yr	0.017	0.031	0.587	NA			0.024	0.011	0.032
Anti-CCP	0.471	0.337	0.169	NA			–0.191	0.155	0.218
Current steroid dose	0.248	0.106	0.024	NA			0.163	0.051	0.002	0.118	0.049	0.017
BMI	–0.049	0.040	0.226	NA			0.061	0.018	0.001	a
Body fat mass	–0.033	0.220	0.136	NA			0.034	0.008	< 0.001	0.022	0.010	0.024
Skeletal muscle mass	–0.019	0.030	0.519	NA			–0.034	0.025	0.170
Body fat/skeletal muscle ratio	0.228	0.203	0.268	NA			0.184	0.199	0.356
HAQ	0.881	0.457	0.060	NA			1.006	0.111	< 0.001	0.858	0.127	< 0.001

DAS28, disease activity score in 28 joints; SE, standard error; NA, not applicable; CCP, citrullinated protein antibody; BMI, body mass index; HAQ, health assessment questionnaire.

^aBody mass index was excluded from multivariable analysis due to collinearity problems with fat mass.