Table 2.

Risk of low vitamin D levels using 23.8 ng/ml (mean levels in controls) as the cut-off, in relation to different characteristics of cutaneous lupus erythematosus

		Odds ratio crude	95% confidence interval
Age	<30	1.0 (Reference)
	31–40	1.0	0.2	6.5
	41–50	1.5	0.2	8.9
	51–60	1.5	0.2	8.9
	>60	2.2	0.3	16.4
Menopause	No	1.0 (Reference)
	Yes	3.3	1.1	9.8
Skin type	II	1.0 (Reference)
	III	0.6	0.2	2.2
	IV	0.6	0.2	2.2
Body mass index	<24.9	1.0 (Reference)
	25–29.9	0.9	0.2	2.5
	>30.0	0.8	0.3	3.9
Smoking	no	1.0 (Reference)
	yes	0.9	0.3	3.0
Duration of disease	<4	1.0 (Reference)
	4–9	2.6	0.6	11.3
	>9	1.3	0.3	5.3
Type of lupus	Subacute	1.0 (Reference)
	Chronic	1.0	0.2	4.6
Daily intake of vitamin D	<3.9	1.0 (Reference)
	3.9–6.7	1.2	0.3	4.6
	>6.7	0.8	0.2	3.7
Severity	<1	1.0 (Reference)
	1–2	1.0	0.3–4.1
	3–4	1.3	0.2–8.8
	>4	3.2	0.5–19.0
Antimalarials	No	1.0 (Reference)
	Yes	7.9	0.9	69.8