Serum 25-Hydroxyvitamin D3 and BAFF Levels Are Associated with Disease Activity in Primary Sjogren’s Syndrome

Table 3

Associations of ESSDAI with serological parameters by univariate and multivariate linear regression.

Variate	Univariate analyses		Multivariate analyses (backward stepwise)
		value		value
Age (years)	−0.006 ± 0.016	0.732	−0.036 ± 0.020	0.076
ESR (mm/hr)	0.017 ± 0.008	0.050
CRP (mg/dL)	0.320 ± 0.374	0.396
25(OH)-D3 (ng/mL)	−0.055 ± 0.015	<	−0.042 ± 0.016
BAFF (pg/mL)	0.001 ± 0.000		0.001 ± 0.000
β2 microglobulin (mg/L)	0.865 ± 0.321

ESSDAI = EULAR Sjogren’s syndrome disease activity index; ESR = erythrocyte sedimentation rate; CRP = C-reactive protein; BAFF = B cell activation of the TNF family; .