. 2021 Jun 30;11(1):e210001. doi: 10.1530/ETJ-21-0001
This work is licensed under a Table 1.
Demographic and obstetric parameters in all women and according to the foetal gender.
| Pregnancy and obstetrical data | All women | Female foetus | Male foetus |
|---|---|---|---|
| Continuous dataa | |||
| Categorical data (n (%)) | n = 1663 | n = 847 (51%) | n = 816 (49%) |
| Maternal age (years) | 29.9 ± 5.8 | 29.7 ± 5.9 | 30.1 ± 5.8 |
| High maternal (age ≥35 years) | 389 (23.3%) | 197 (23.3%) | 192 (23.5%) |
| Caucasian background | 392 (23.6%) | 197 (23.3%) | 195 (23.9%) |
| BMI pre-pregnancy (kg/m2) | 25.6 ± 4.8 | 25.5 ± 4.9 | 25.8 ± 4.7 |
| Obesity (BMI ≥ 30 kg/m2) | 267 (16.1%) | 129 (15.2%) | 138 (16.9%) |
| Tobacco use | 252 (15.2%) | 130 (15.3%) | 122 (15.0%) |
| Parity (n) | 1 (0–2) | 1 (0–2) | 1 (0–2) |
| Multiparty (≥3) | 203 (12.2%) | 106 (12.5%) | 97 (11.9%) |
| History of >1 first-trimester MC | 111 (6.7%) | 55 (6.5%) | 56 (6.9%) |
No P values are given because foetal gender cannot be significantly associated with any outcomes because of Mendelian randomisation.
aContinuous data are expressed as mean ± SD or median (IQR range).
MC, miscarriage.