Maternal-Cord Blood Vitamin D Correlations Vary by Maternal Levels
Table 2
25(OH)D levels for prenatal 25(OH)D and cord blood 25(OH)D. Values are in ng/mL.
Prenatal
Cord
Mean (SD)
Range
Mean (SD)
Range
Baby is Black
175
20.1 (10.3)
2.5–49.9
9.1 (6.6)
2.5–47.5
Baby is White
66
32.9 (10.8)
13.1–64.9
15.6 (7.2)
2.5–28.7
Baby is firstborn
45
27.7 (11.6)
2.5–51.3
13.2 (6.8)
2.5–28.2
Baby is not firstborn
196
22.7 (11.8)
2.5–64.9
10.4 (7.4)
2.5–47.5
Winter birth
44
24.1 (12.2)
2.5–51.3
10.5 (7.4)
2.5–28.2
Nonwinter birth
197
23.5 (11.8)
2.5–64.9
11.0 (7.4)
2.5–47.5
Maternal prenatal 25(OH)D <40 ng/mL
218
21.3 (9.6)
2.5–39.5
9.8 (6.5)
2.5–47.5
Maternal prenatal 25(OH)D ≥40 ng/mL
23
46.1 (6.0)
40.3–64.9
21.9 (6.2)
2.5–28.7
Maternal prenatal 25(OH)D <20 ng/mL
95
12.2 (5.2)
2.5–19.8
6.0 (6.2)
2.5–47.5
Maternal prenatal 25(OH)D ≥20 ng/mL
146
31.0 (8.7)
20.1–64.9
14.1 (6.2)
2.5–28.7
Maternal prenatal 25(OH)D <15 ng/mL
60
9.2 (4.1)
2.5–14.8
5.7 (7.5)
2.5–47.5
Maternal prenatal 25(OH)D ≥15 ng/mL
181
28.4 (9.5)
15.2–64.9
12.6 (6.5)
2.5–28.7
Maternal BMI at 1st prenatal visit <30 kg/m2
126
26.8 (12.7)
2.5–64.9
12.1 (7.5)
2.5–35.9
Maternal BMI at 1st prenatal visit ≥30 kg/m2
109
20.0 (9.8)
2.5–50.2
9.9 (7.0)
2.5–47.5
Maternal BMI at 1st prenatal visit <35 kg/m2
170
25.8 (12.2)
2.5–64.9
11.8 (7.3)
2.5–35.9
Maternal BMI at 1st prenatal visit ≥35 kg/m2
65
18.1 (9.1)
2.5–42.2
9.1 (7.3)
2.5–47.5
Preterm birth (<37 weeks)
20
23.1 (14.6)
2.5–51.3
13.8 (9.5)
2.5–35.9
Full term birth (≥37 weeks)
218
23.5 (11.6)
2.5–64.9
10.6 (7.1)
2.5–47.5
Low birth weight (≤2500 g)
17
17.2 (10.5)
2.5–38.9
10.2 (8.1)
2.5–35.9
Not low birth weight (>2500 g)
207
24.0 (12.0)
2.5–64.9
10.9 (7.4)
2.5–47.5
Baby born vaginally
153
24.4 (12.8)
2.5–64.9
11.3 (7.4)
2.5–35.9
Baby born via c-section
88
22.3 (10.0)
2.5–51.3
10.3 (7.3)
2.5–47.5
Mother is atopic
144
22.9 (10.8)
2.5–58.1
11.1 (7.3)
2.5–47.5
Mother is not atopic
90
24.6 (13.6)
2.5–64.9
10.5 (7.6)
2.5–28.7
Indicates no statistically significant difference in 25(OH)D levels between those with and without that characteristic at that time point (, Wilcoxon Rank Sum test).