Table 4.

Comparison of the baseline and post-intervention values of variables based on serum vitamin D (ng/mL) status in the study groups

Variables	10 >Vitamin D ≥20			20 >Vitamin D >30
	Intervention group (n=9)	Placebo group (n=9)	P	Intervention group (n=17)	Placebo group (n=16)	P
Anxiety
Baseline	12.89±3.14	11.11±5.16	0.06†	12.00±4.82	11.12±5.51	0.63†
16 weeks	9.78±3.68	10.78±4.04	0.06†	9.82±4.34	12.18±4.26	0.12†
Change	-5±4.92	2.67±2.31	0.01†,**	-2.18±3.33	1.06±2.73	0.03†,**
P (within group)‡	0.02	0.24		0.05	0.27
Stress
Baseline	13.22±4.23	12.77±2.63	0.79†	13.29±6.02	14.44±4.98	0.33†
16 weeks	7.88±3.89	11.89±3.69	0.96†	11.88±4.97	13.56±5.01	0.43†
Change	-0.33±3.33	-00±1.73	0.84†	0.25	0.24	0.70†
P (within group)‡	0.83	0.99		-1.42±3.91	-0.88±2.87
Depression
Baseline	12.77±4.14	9.22±4.15	0.46†	11.40±5.22	13.18±5.06	0.33†
16 weeks	12.89±6.27	12.78±4.02	0.68†	9.94±4.05	11.25±5.00	0.42†
Change	-3.00±2.71	-0.33±2.57	0.14†	-1.47±2.71	1.94±3.32	0.76†
P (within group)‡	0.04	0.78		0.22	0.09
hs-CRP (mg/L)
Baseline	2.52 (1.19, 12.19)	2.79 (1.54, 4.27)	0.73₤	3.35 (1.80, 7.05)	7.18 (2.71, 12.31)	0.09₤
16 weeks	2.21 (1.12, 9.09)	2.56 (1.84, 5.51)	0.07₤	2.56 (1.18, 7.88)	6.01 (3.02, 11.89)	0.04₤
Change	-0.75 (-1.82, -0.14)	0.35 (-0.39, 0.86)	0.01₤,**	-0.21 (-0.86, 0.27)	0.23 (-1.51, 1.41)	0.08₤
P (within group)¥	0.008**	0.23		0.03	0.26
IL-10 (ng/mL)
Baseline	68.00 (48.70, 111.20)	99.00 (59.30, 118.50)	0.34₤	85.00 (62.50, 107.00)	90.00 (74.12, 116.00)	0.48₤
16 weeks	92.00 (48.80, 143.25)	83.00 (63.50, 114.50)	0.76₤	94.00 (81.25, 164.50)	83.50 (68.85, 109.25)	0.26₤
Change	4.40 (-6.35, 19.00)	00.00 (-10.40, 6.20)	0.34₤	10.00 (-3.25, 49.10)	2.55 (-20.75, 14.76)	0.08₤
P (within group)¥	0.31	0.67		0.67	0.83

Variables are represented mean±SD or median (25^th, 75^th percentiles). ^†By independent t-test, ^‡By paired sample t-test, ^¥Obtained from Wilcoxon signed rank test, ^₤Obtained from Mann-Whitney test, **P<0.05. SD=Standard deviation, hs-CRP=high sensitivity C-reactive protein, IL-10=Interleukin 10