Table 3. Multiple linear regression showing the effect of disease on MCS.

	β	95% CI		p value
Age, years	-0.04	-0.17	0.08	0.502
Female	1.26	-2.99	5.50	0.561
White	-0.89	-4.87	3.09	0.659
Education (> high school)	1.45	-2.07	4.97	0.419
Disease
IIM vs SSc	-11.05	-17.53	-4.58	0.001
IIM vs SLE	-5.18	-11.79	1.42	0.124
IIM vs RA	-11.72	-18.62	-4.81	0.001
SLE vs SSc	-5.87	-10.47	-1.27	0.013
SLE vs RA	-6.54	-11.88	-1.19	0.017
RA vs SSc	0.67	-3.99	5.32	0.778

CI, confidence interval