Evaluation of the efficacy of two doses of vitamin D supplementation on glycemic, lipidemic and oxidative stress biomarkers during pregnancy: a randomized clinical trial

Table 1 Baseline characteristics of subjects^a

Characteristic	Group 1 (1000 IU/d) n₁ = 37	Group 2 (2000 IU/d) n₂ = 36	p value ²
Age, year	27.94 ± 5.60	27.41 ± 5.15	0.80
Gestational age at enrollment, week	10.39 ± 1.69	10.08 ± 2.17	0.77
Gestational age at delivery (week)	38.79 ± 1.65	39.91 ± 5.78	0.57
Weight gain at end of pregnancy (kg)	10.82 ± 5.21	12.01 ± 5.94	0.38
Weekly sunlight exposure score at enrollment	2.63 ± 2.08	1.97 ± 1.67	0.14
Weekly sunlight exposure score at last visit	1.70 ± 1.65	1.21 ± 1.15	0.17
Sunscreen use, n (%)	11 (30.4)	13 (36.9)	0.49
Physical activity at enrollment, n (%)			0.37
Low	29 (78.4)	28 (77.8)
Moderate	8 (21.6)	6 (16.7(
High	0 (0.0)	2 (5.6)
Physical activity at last visit, n (%)			0.59
Low	32 (86.5)	29 (80.6)
Moderate	5 (13.5)	6 (16.7)
High	0 (0.0)	1 (2.8)
Duration of intervention, n (%)			0.87
24 wk	11 (29.72)	10 (27.77)
25 wk	9 (24.32)	11 (30.55)
26 wk	6 (16.21)	7 (19.44)
27 wk	7 (18.91)	5 (13.88)
28 wk	4 (10.81)	3 (8.33)
Season at first visit, n (%)			0.89
Winter	14 (37.6)	16 (44.4)
Spring	23 (62.1)	20 (55.5)
Routine supplementation^a, n (%)
Multivitamin	25 (67.5)	22 (61.1)	0.52
Folic acid	29 (78.37)	25 (69.44)	0.37
Iron	21 (56.75)	22 (61.11)	0.55

^adata are expressed as mean ± SD and the distribution between groups expressed as n (%)
²t test and χ2 test were used to compare baseline characteristics
BMI Body mass index
^aThe participants started to intake routine supplementation late in the fourth month of pregnancy

ISSN: 1471-2393