Table 1.
Sociodemographic characteristics and previous medical problems in women with body mass index (BMI) ≥60 kg/m2 and comparison women (BMI >50–59.9 kg/m2)
| Characteristic | Number (%) of obese women with BMI ≥60 kg/m2 (n=111) | Number (%) of women with BMI 50–59.9 kg/m2 (n=821) | P values | |
| Sociodemographic characteristics | ||||
| Age | Mean (Std) | 31.7 (5.51) | 30.3 (5.67) | 0.017 |
| BMI at booking | Median (IQR) | 61.7 (60–64.9) | 52.3 (50.8–54.9) | <0.001 |
| Max recorded BMI | Median (IQR) | 62.9 (61–66.8) | 52.7 (50.9–55.0) | <0.001 |
| Smoking status | Never/ex-smoker | 85 (76.6) | 599 (73) | 0.42 |
| Smoked during pregnancy | 24 (21.6) | 206 (25.1) | ||
| Missing | 2 (1.8) | 16 (1.9) | ||
| Known previous medical history | ||||
| Previous pregnancy problems | None | 41 (36.9) | 273 (33.3) | 0.713 |
| Yes | 33 (29.7) | 266 (32.4) | ||
| Primigravid | 35 (31.5) | 271 (33.0) | ||
| Missing | 2 (1.8) | 11 (1.3) | ||
| Known cardiac disease | None | 109 (98.2) | 812 (98.9) | 0.2* |
| Yes | 2 (1.8) | 5 (0.6) | ||
| Missing | 0 (0) | 4 (0.5) | ||
| Known renal disease | None | 110 (99.1) | 809 (98.5) | 0.999* |
| Yes | 1 (0.9) | 8 (1.0) | ||
| Missing | 0 (0) | 4 (0.5) | ||
| Known mental health issues | None | 99 (89.2) | 756 (92.1) | 0.219 |
| Yes | 12 (10.8) | 61 (7.4) | ||
| Missing | 0 (0) | 4 (0.5) | ||
| Known asthma | None | 98 (88.3) | 720 (87.7) | 0.961 |
| Yes | 13 (11.7) | 97 (11.8) | ||
| Missing | 0 (0) | 4 (0.5) | ||
| Previous caesarean delivery | None | 53 (47.7) | 366 (44.6) | 0.297 |
| Yes | 22 (19.8) | 181 (22.0) | ||
| Primigravid | 35 (31.5) | 271 (33.0) | ||
| Missing | 1 (0.9) | 3 (0.4) | ||
| Parity | Nulliparous | 35 (31.5) | 271 (33) | 0.803 |
| Multiparous | 75 (67.6) | 550 (67) | ||
| Missing | 1 (0.9) | 0 (0) | ||
| Current pregnancy | ||||
| Multiple pregnancy | Singleton | 108 (97.3) | 800 (97.4) | 0.928 |
| Twin pregnancy | 3 (2.7) | 21 (2.6) | ||
| Known hypertension prior to pregnancy requiring treatment | None | 103 (92.8) | 767 (93.4) | 0.693 |
| Yes | 8 (7.2) | 51 (6.2) | ||
| Missing | 0 (0) | 3 (0.4) | ||
| Known pre-existing diabetes prior to pregnancy | None | 101 (91.0) | 757 (92.2) | 0.657 |
| Yes | 10 (9.0) | 64 (7.8) | ||
| Missing | – | – | ||
| Insulin-dependent diabetes | Yes | 4 (3.6) | 17 (2.1) | 0.705* |
*Fisher’s exact test