|Independent risk factors for major postpartum haemorrhage (≥1000mls) after vaginal delivery in term nulliparous women|
|Risk factor||Adjusted OR’s*|
|BMI ≥ 30.0||2.11 (1.54-2.89)|
|Pacific island||2.30 (1.62-3.27)|
|Antepartum haemorrhage†||1.91 (1.25-2.91)|
|Induction of labour||1.46 (1.15-1.86)|
|Third stage of labour > 15min‡||1.62 (1.18-2.22)|
|Retained placenta||4.88 (3.08-7.73)|
|3rd or 4th degree tear||5.09 (2.91-8.89)|
|Birthweight (g) ↑ 500g||1.39 (1.22-1.59)|
Data are adjusted odds ratio (95% confidence interval).
* Adjusted for all variables in Table 1 plus duration of 1st, 2nd and 3rd stages of labour and perineal trauma (including graze, second degree tear).
†from any cause excluding placenta praevia >20wk gestation.
‡ compared with third stage 5–10 minutes.
Fyfe et al.
Fyfe et al. BMC Pregnancy and Childbirth 2012 12:112 doi:10.1186/1471-2393-12-112