| Body mass index (BMI) at booking (kg/m2) | Nulliparous women; Average rate of transfer from home to an obstetric unit | Multiparous women: Average rate of transfer from home to an obstetric unit |
|---|---|---|
| 18.5 to 24.9 | 448 per 1,000 (so this does not happen in about 552 pregnancies per 1,000) | 102 per 1,000 (so this does not happen in about 898 pregnancies per 1,000) |
| 25 to 29.9 | No difference compared with women with a BMI 18.5 to 24.9 kg/m2 | No difference compared with women with a BMI 18.5 to 24.9 kg/m2 |
| 30 to 35 | No difference compared with women with a BMI 18.5 to 24.9 kg/m2 | 145 per 1,000 (so this does not happen in about 855 pregnancies per 1,000). This is an average increase of 43 per 1,000 compared with women with a BMI 18.5 to 24.9 kg/m2 (so for about 957 pregnancies per 1,000, the outcome was the same) |
From: Intrapartum care
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