From: Amniotic fluid embolism incidence, risk factors and outcomes: a review and recommendations
 | Australia (NSW) | Canada | Netherlands | UK | US |
---|---|---|---|---|---|
Pregnancy factors | Â | Â | Â | Â | Â |
Multiple pregnancy | * | OR 2.5 (0.9-6.2) | RR 7.1 (0.9-56.5) | aOR≠5.3 (1.2-23.0) | * |
Previous caesarean | RR 1.7 (0.5-6.0) | aOR 0.8 (0.5-1.2) | * | * | aOR 0.9 (0.6-1.3) |
Hypertensive disorders | Any hypertensive disorder RR 1.3 (0.3-5.5) Pre-existing hypertension RR 9.5 (2.2-41) | Eclampsia aOR 11.5 (2.8-48.6) Pre-eclampsia aOR 1.4 (0.8-2.5) | * | * | Eclampsia aOR 29.1 (7.1-119) Pre-eclampsia aOR 7.3 (4.3-12.5) |
Placenta praevia | RR 10.5 (1.4-79) | Praevia or abruption aOR 3.5 (2.3-5.5) | * | aOR≠15.6 (2.5-98.8) | aOR 30.4 (15.4-60) |
Placental abruption | RR 13.3 (1.8-100) |  | * | aOR≠17.3 (1-304.1) | aOR 8.0 (4.0-15.9) |
Non-vertex at delivery | RR 6.8 (2.4-18.8) | * | RR 2.4 (0.3-19.4) | * | * |
Chorioamnionitis | No cases | aOR 1.4 (0.6-3.2) | * | * | aOR 1.6 (0.7-3.4 |
Polyhydramnios | * | aOR 3.0 (1.2-7.3) | * | * | * |