Table 6

Pregnancy factors associated with amniotic fluid embolism

Australia (NSW)

Canada

Netherlands

UK

US


Pregnancy factors


Multiple pregnancy

*

OR 2.5 (0.9-6.2)

RR 7.1 (0.9-56.5)

aOR5.3 (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)

*

aOR15.6 (2.5-98.8)

aOR 30.4 (15.4-60)


Placental abruption

RR 13.3 (1.8-100)

*

aOR17.3 (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)

*

*

*


RR = Relative Risk, aOR = adjusted Odds Ratio

Adjusted for age, parity, smoking status, socioeconomic status, ethnicity, BMI, multiple pregnancy, placenta praevia or abruption, labour induction and postdates

* No data or no accurate or limited data

Knight et al. BMC Pregnancy and Childbirth 2012 12:7   doi:10.1186/1471-2393-12-7

Open Data