Table 2.
Complicating conditions identified at the start of care in labour by maternal BMI category in healthy women without additional risk factors
| Underweight n = 575 | Normal weight n = 8890 | Overweight n = 4757 | Obese n = 1947 | Very obese n = 982 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | n | % | n | % | |
| Prolonged rupture of membranes >18 hours | 36 | 6.26 | 645 | 7.26 | 387 | 8.14 | 161 | 8.27 | 72 | 7.33 |
| Meconium-stained liquor | 34 | 5.91 | 514 | 5.78 | 316 | 6.64 | 149 | 7.65 | 89 | 9.06 |
| Proteinuria 1+ or more | 3 | 0.52 | 148 | 1.66 | 88 | 1.85 | 52 | 2.67 | 40 | 4.07 |
| Hypertension* | 9 | 1.57 | 188 | 2.11 | 142 | 2.99 | 94 | 4.83 | 38 | 3.87 |
| Abnormal vaginal bleeding | 13 | 2.26 | 110 | 1.24 | 69 | 1.45 | 17 | 0.87 | 8 | 0.81 |
| Non-cephalic presentation | 3 | 0.52 | 48 | 0.54 | 29 | 0.61 | 5 | 0.26 | 3 | 0.31 |
| Abnormal fetal heart rate | 10 | 1.74 | 162 | 1.82 | 106 | 2.23 | 54 | 2.77 | 20 | 2.04 |
| Other complications | 0 | – | 21 | 0.24 | 17 | 0.36 | 7 | 0.36 | 2 | 0.20 |
| Any complicating condition | 97 | 16.87 | 1619 | 18.21 | 999 | 21.00 | 460 | 23.63 | 230 | 23.42 |
*
Either diastolic blood pressure of ≥90 mmHg on more than one occasion 20 minutes apart or ≥100 mmHg on one occasion; or systolic blood pressure ≥160 mmHg on at least one occasion.