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

Table 4

Negative binomial regression for self-reported flare days (SRF-days) and independent variables.

	n	Mean (SD)	95% CI
SRF number (year)	80	6.8 (9.7)	4.6	8.9
SRF-days (year)	80	29.2 (39)	20.5	37.9
Univariate model	OR		95% CI
25(OH)D	0.99	0.27	0.97	1.0
Deficient 25(OH)D	1.33	0.37	0.72	2.46
Insufficient 25(OH)D	0.93	0.82	0.52	1.67
Abnormal 25(OH)D	1.53	0.25	0.75	3.11
Makeup (FMSS)	1.0	0.002	1.0	1.0
Diagnosis years	0.97	0.024	0.94	1.0
ANA 1 : 80	0.42	0.008	0.22	0.80
dsDNA	0.29	0.009	0.12	0.74
ENA	0.54	0.027	0.31	0.93
Arthritis	0.48	0.022	0.26	0.90
Immunological disorder	0.49	0.009	0.29	0.84
Multivariate model	OR		95% CI
Makeup (FMSS)	0.99	0.001	0.99	0.99
ANA 1 : 80	0.48	0.007	0.28	0.85
Arthritis	0.51	0.003	0.33	0.79