Research Article

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.

PrenatalCord
Mean (SD)RangeMean (SD)Range

Baby is Black17520.1 (10.3)2.5–49.99.1 (6.6)2.5–47.5
Baby is White6632.9 (10.8)13.1–64.915.6 (7.2)2.5–28.7

Baby is firstborn4527.7 (11.6)2.5–51.313.2 (6.8)2.5–28.2
Baby is not firstborn19622.7 (11.8)2.5–64.910.4 (7.4)2.5–47.5

Winter birth4424.1 (12.2)2.5–51.310.5 (7.4)2.5–28.2
Nonwinter birth19723.5 (11.8)2.5–64.911.0 (7.4)2.5–47.5

Maternal prenatal 25(OH)D <40 ng/mL21821.3 (9.6)2.5–39.59.8 (6.5)2.5–47.5
Maternal prenatal 25(OH)D ≥40 ng/mL2346.1 (6.0)40.3–64.921.9 (6.2)2.5–28.7

Maternal prenatal 25(OH)D <20 ng/mL9512.2 (5.2)2.5–19.86.0 (6.2)2.5–47.5
Maternal prenatal 25(OH)D ≥20 ng/mL14631.0 (8.7)20.1–64.914.1 (6.2)2.5–28.7

Maternal prenatal 25(OH)D <15 ng/mL609.2 (4.1)2.5–14.85.7 (7.5)2.5–47.5
Maternal prenatal 25(OH)D ≥15 ng/mL18128.4 (9.5)15.2–64.912.6 (6.5)2.5–28.7

Maternal BMI at 1st prenatal visit <30 kg/m212626.8 (12.7)2.5–64.912.1 (7.5)2.5–35.9
Maternal BMI at 1st prenatal visit ≥30 kg/m210920.0 (9.8)2.5–50.29.9 (7.0)2.5–47.5

Maternal BMI at 1st prenatal visit <35 kg/m217025.8 (12.2)2.5–64.911.8 (7.3)2.5–35.9
Maternal BMI at 1st prenatal visit ≥35 kg/m26518.1 (9.1)2.5–42.29.1 (7.3)2.5–47.5

Preterm birth (<37 weeks)2023.1 (14.6)2.5–51.313.8 (9.5)2.5–35.9
Full term birth (≥37 weeks)21823.5 (11.6)2.5–64.910.6 (7.1)2.5–47.5

Low birth weight (≤2500 g)1717.2 (10.5)2.5–38.910.2 (8.1)2.5–35.9
Not low birth weight (>2500 g)20724.0 (12.0)2.5–64.910.9 (7.4)2.5–47.5

Baby born vaginally15324.4 (12.8)2.5–64.911.3 (7.4)2.5–35.9
Baby born via c-section8822.3 (10.0)2.5–51.310.3 (7.3)2.5–47.5

Mother is atopic14422.9 (10.8)2.5–58.111.1 (7.3)2.5–47.5
Mother is not atopic9024.6 (13.6)2.5–64.910.5 (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).