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Table 2 Independent risk factors for major postpartum haemorrhage (≥1000mls) after vaginal delivery in term nulliparous women

From: Maternal obesity and postpartum haemorrhage after vaginal and caesarean delivery among nulliparous women at term: a retrospective cohort study

Risk factor Adjusted OR’s*
BMI ≥ 30.0 2.11 (1.54-2.89)
Ethnicity  
 Pacific island 2.30 (1.62-3.27)
 Asian 1.64 (1.22-2.20)
Antepartum haemorrhage 1.91 (1.25-2.91)
Pre-eclampsia 1.97 (1.22-3.19)
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)
Episiotomy 1.94 (1.19-3.19)
3rd or 4th degree tear 5.09 (2.91-8.89)
Birthweight (g) ↑ 500g 1.39 (1.22-1.59)
  1. Data are adjusted odds ratio (95% confidence interval).
  2. * 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).
  3. from any cause excluding placenta praevia >20wk gestation.
  4. compared with third stage 5–10 minutes.