Table 1.
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Selected Characteristic of the Participating Pregnant Women (N = 3285)

CharacteristicsMean ±SD or n (%)
Gestational age, wk39.12 ± 1.30
Maternal age, y26.64 ± 3.95
Pre-pregnancy BMI, kg/m221.21 ± 2.86
Parity
 Nulliparous2366 (72.02%)
 Multiparous919 (27.98%)
Fetal plurality
 Singleton3244 (98.80%)
 Multiple-gestation pregnancies41 (1.20%)
Daily vitamin D intake
 Yes2227 (67.80%)
 No1058 (32.20%)
Maternal smoking during this pregnancy6 (0.20%)
Maternal drinking during this pregnancy9 (0.27%)
Maternal education
 Middle school or below700 (21.30%)
 High school1873 (57.00%)
 College or above712 (21.70%)
Monthly income
 <$7502634 (80.20%)
 ≥$750651 (19.80%)
Season of blood sample collection
 Spring743 (22.60%)
 Summer1196 (36.40%)
 Autumn942 (28.70%)
 Winter404 (12.30%)
25(OH)D levels16.84 ± 6.06
CharacteristicsMean ±SD or n (%)
Gestational age, wk39.12 ± 1.30
Maternal age, y26.64 ± 3.95
Pre-pregnancy BMI, kg/m221.21 ± 2.86
Parity
 Nulliparous2366 (72.02%)
 Multiparous919 (27.98%)
Fetal plurality
 Singleton3244 (98.80%)
 Multiple-gestation pregnancies41 (1.20%)
Daily vitamin D intake
 Yes2227 (67.80%)
 No1058 (32.20%)
Maternal smoking during this pregnancy6 (0.20%)
Maternal drinking during this pregnancy9 (0.27%)
Maternal education
 Middle school or below700 (21.30%)
 High school1873 (57.00%)
 College or above712 (21.70%)
Monthly income
 <$7502634 (80.20%)
 ≥$750651 (19.80%)
Season of blood sample collection
 Spring743 (22.60%)
 Summer1196 (36.40%)
 Autumn942 (28.70%)
 Winter404 (12.30%)
25(OH)D levels16.84 ± 6.06
Table 1.
Open in new tab

Selected Characteristic of the Participating Pregnant Women (N = 3285)

CharacteristicsMean ±SD or n (%)
Gestational age, wk39.12 ± 1.30
Maternal age, y26.64 ± 3.95
Pre-pregnancy BMI, kg/m221.21 ± 2.86
Parity
 Nulliparous2366 (72.02%)
 Multiparous919 (27.98%)
Fetal plurality
 Singleton3244 (98.80%)
 Multiple-gestation pregnancies41 (1.20%)
Daily vitamin D intake
 Yes2227 (67.80%)
 No1058 (32.20%)
Maternal smoking during this pregnancy6 (0.20%)
Maternal drinking during this pregnancy9 (0.27%)
Maternal education
 Middle school or below700 (21.30%)
 High school1873 (57.00%)
 College or above712 (21.70%)
Monthly income
 <$7502634 (80.20%)
 ≥$750651 (19.80%)
Season of blood sample collection
 Spring743 (22.60%)
 Summer1196 (36.40%)
 Autumn942 (28.70%)
 Winter404 (12.30%)
25(OH)D levels16.84 ± 6.06
CharacteristicsMean ±SD or n (%)
Gestational age, wk39.12 ± 1.30
Maternal age, y26.64 ± 3.95
Pre-pregnancy BMI, kg/m221.21 ± 2.86
Parity
 Nulliparous2366 (72.02%)
 Multiparous919 (27.98%)
Fetal plurality
 Singleton3244 (98.80%)
 Multiple-gestation pregnancies41 (1.20%)
Daily vitamin D intake
 Yes2227 (67.80%)
 No1058 (32.20%)
Maternal smoking during this pregnancy6 (0.20%)
Maternal drinking during this pregnancy9 (0.27%)
Maternal education
 Middle school or below700 (21.30%)
 High school1873 (57.00%)
 College or above712 (21.70%)
Monthly income
 <$7502634 (80.20%)
 ≥$750651 (19.80%)
Season of blood sample collection
 Spring743 (22.60%)
 Summer1196 (36.40%)
 Autumn942 (28.70%)
 Winter404 (12.30%)
25(OH)D levels16.84 ± 6.06
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