The Clinical Effect of Oral Vitamin D2 Supplementation on Psoriasis: A Double-Blind, Randomized, Placebo-Controlled Study

Table 3

Laboratory test results at the 3-month and 6-month follow-ups.

Laboratory tests	Vitamin D2	Placebo	p-value
At 3 months
Serum 25(OH)D level (ng/mL)	26.61±6.38	24.38±7.89	0.34
Vitamin D status classification			0.07
Deficiency, n(%)	2(9.5%)	7(41.2%)
Insufficiency, n(%)	15(71.4%)	8(47.1%)
Adequacy, n(%)	4(19.0%)	2(11.8%)
Parathyroid hormone level (pg/mL)	63.09±21.47	55.15±22.15	0.27
Calcium level (mg/dL)	8.83±0.47	9.07±0.43	0.12
Phosphorus level (mg/dL)	3.2±0.56	3.9±1.52	0.10
CRP level (mg/L)	3.61±3.62	3.54±3.92	0.96
CRP change (mg/L)	-3.2482±6.24	-0.84±3.88	0.08
Creatinine level (mg/dL)	0.88±0.23	0.87±0.22	0.90
Albumin level (mg/L)	3.97±0.38	3.99±0.35	0.81
At 6 months
Serum 25(OH)D level (ng/mL)	27.39±5.89	22.44±7.28	0.029
Vitamin D status classification			0.003
Deficiency, n(%)	0(0.0%)	7(43.8%)
Insufficiency, n(%)	17(81.0%)	7(43.8%)
Adequacy, n(%)	4(19.0%)	2(12.5%)
Parathyroid hormone level (pg/mL)	52.65±18.87	49.13±13.55	0.54
Calcium level (mg/dL)	9.12±0.29	9.19±0.30	0.46
Phosphorus level (mg/dL)	3.61±0.74	3.41±0.32	0.35
CRP level (mg/L)	5.67±7.35	3.99±0.32	0.46
CRP change (mg/L)	-1.03±9.07	0.30±3.01	0.58
Creatinine level (mg/dL)	0.88±0.23	0.87±0.22	0.90
Albumin level (mg/L)	3.97±0.38	3.99±0.35	0.81

Continuous data are mean ± standard deviation (SD); CRP, C-reactive protein.