Vitamin D Levels Are Associated with Expression of SLE, but Not Flare Frequency

Table 3

Tests of association ANA80 and (2) transformed 25(OH)D levels.

Test	Group ()	OR		Mean (SD)	95% CI
Two-sampled -test; 25(OH)D by ANA80	Control, SLE (121)		0.014
	ANA −ve (41)			68.9 (21.5)	62.1	75.7
	ANA +ve (80)			60.3 (16.9)	56.5	64.0
Two-sampled -test; (2)25(OH)D by ANA80	Control, SLE (121)		0.017
	ANA −ve (41)			6.0 (0.45)	5.9	6.2
	ANA +ve (80)			5.9 (0.42)	5.8	5.9
Two-sampled -test; (2)25(OH)D by group	Cohort (121)		0.00
	Control (41)			6.1 (0.42)	6.0	6.3
	SLE (80)			5.8 (0.40)	5.7	5.9
Linear regression; (2)25(OH)D ANA80	Control, SLE (121)		0.029		−0.35	−0.02
	ANA −ve (41)
	ANA +ve (80)
Logistic regression; ANA80 (2)25(OH)D	Control, SLE (121)	0.36	0.032		0.14	0.92
	ANA −ve (41)
	ANA +ve (80)