From: Increased postpartum haemorrhage, the possible relation with serotonergic and other psychopharmacological drugs: a matched cohort study
Crude Odds
Adjusted Oddsa
95% C.I.
Outcome before matching
 postpartum haemorrhage
1.7
1.3–2.2
1.6
1.2–2.1
Outcome after matching
1.5
1.1–2.1