Table 4. Multivariate analysis of risk factors for arterial stiffness.

SLE subjects
	Linear correlation coefficient	Unstandardized betas	95% CI	p
Age	0.49	0.03	0.21 to 0.69	0.08
Systolic blood pressure	0.67	0.04	0.44 to 0.81	0.0005
GFR	0.52	−0.008	0.71 to 0.25	0.17
Cumulative steroid dose	0.38	0.015	0.07 to 0.61	0.01

GRF, glomerular rate filtration, calculated with the Modification of Diet in Renal Disease (MDRD) equation and expressed in milliliters per minute per 1.73 square meters of body surface area