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) |