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Logo of bmcpcncBioMed Centralsearchsubmit a manuscriptregisterthis articleBMC Pregnancy and Childbirth
Published online 2007 August 30. doi: 10.1186/1471-2393-7-18

Table 3

Appropriate Denominator* when Considering Pregnancy Outcomes and Complications by Week of Gestation

Pregnancies Delivered (PD)MixedOngoing Pregnancies (OP)
Forceps deliveryAntepartum stillbirthAbruption
Vacuum deliveryOligohydramnios (if measured)Chorioamnionitis
Epidural usePreeclampsia/EclampsiaPrimary cesarean
3rd and 4th degree lacerationsOnset of laborUterine rupture
Cesarean in laborAntepartum hemorrhage
Postpartum hemorrhagePremature rupture of membranes
Shoulder dystociaPreterm birth
Neonatal outcomes

*The type of denominator denotes the population at risk for the outcome or complication