Table 2

Simple associations and stepwise multiple linear regression model (R²=0.631) with the natural logarithm of eIMT as the dependent variable

	Variables considered in stepwise multiple linear regression, adjusted only for ln bIMT		Final stepwise multiple linear regression model
	β (SE)	p Value	β (SE)	p Value
ln bIMT	0.504 (0.80)	<0.001	0.506 (0.075)	<0.001
Age at diagnosis (years)	0.006 (0.002)	<0.001	0.005 (0.001)	0.001
Age at entry (years)	0.006 (0.001)	<0.001
Male sex	0.057 (0.063)	0.372	0.084 (0.055)	0.135
SLE duration (years)	0.002 (0.002)	0.051	0.004 (0.002)	0.044
Diabetes	0.140 (0.76)	0.067
Postmenopausal	0.112 (0.032)	0.001
Sedentary lifestyle	0.059 (0.033)	0.074
C3 level/100	0.209 (0.75)	0.006	0.018 (0.006)	0.003
C5a level/100	0.014 (0.06)	0.003	0.158 (0.073)	0.033
Homocysteine level/100	0.636 (0.332)	0.058	0.590 (0.006)	0.041

β(SE), β coefficient (standard error); ln bIMT, natural logarithm of basal intima-media thickness; eIMT, end intima-media thickness; SLE, systemic lupus erythematosus.