Table 1 Description of the sample (14109 pregnant women)
Variable | Mean or frequency |
|---|---|
Maternal age at conception in years, mean (SD) | 31.7 (5.2) |
Categories of maternal age at conception, number (%) | |
<20 years | 170 (1.2) |
20-35 years | 10559 (74.8) |
36-45 years | 3370 (23.9) |
>45 years | 10 (0.1) |
Parity, number (%) | |
Primiparous | 7577 (53.7) |
Multiparous | 6532 (46.3) |
Maternal height at conception in cm, mean (SD) | 165.5 (6.1) |
Categories of maternal height at conception, number (%) | |
≤ 165 cm | 7461 (52.9) |
>165 cm | 6648 (47.1) |
Maternal weight at conception in kg, mean (SD) | 62.1 (11.2) |
Maternal BMI at conception, mean (SD) | 22.6 (3.8) |
Categories of maternal BMI at conception, number (%) | |
<18.5 | 1033 (7.3) |
18.5-24.9 | 10323 (73.2) |
25-29.9 | 2040 (14.5) |
≥30 | 713 (5.0) |
Gestational age at delivery in weeks, mean (SD) | 39 (1.2) |
Categories of gestational age at delivery, number (%) | |
37-40 weeks | 11481 (81.4) |
>40 weeks | 2628 (18.6) |
Maternal diabetes, number (%) | |
No | 13713 (97.1) |
Pre-gestational | 36 (0.3) |
Gestational | 360 (2.6) |
Maternal weight gain during pregnancy in kg, mean (SD) | 12.9 (4.3) |
Categories of maternal weight gain during pregnancy according to IOM recommendations, number (%) | |
Recommended by IOM | 5755 (40.8) |
< Recommended by IOM | 4248 (30.1) |
> Recommended by IOM | 4106 (29.1) |
Mode of delivery, number (%) | |
Spontaneous | 9974 (70.7) |
Operative | 1119 (7.9) |
Cesarean section | 3016 (21.4) |
Infant birthweight in g, mean (SD) | 3377 (430) |
Categories of infant birthweight, number (%) | |
<4000 g | 13043 (92.4) |
≥4000 g | 1066 (7.6) |
Neonates sex, number (%) | |
Female | 7006 (49.7) |
Male | 7103 (50.3) |