PMC

Flow chart showing selection of cases and controls. Note: GW = gestational week, SAMM = severe acute maternal morbidity.

Association between cesarean delivery (A) before and (B) during labour, and severe acute intra- or postpartum maternal morbidity by maternal age. Note: CI = confidence interval, OR = odds ratio. *Variables for propensity score: country of birth, living without partner, age, body mass index (BMI), current smoker, pre-existing medical condition, parity and prior cesarean delivery, previous obstetric hemorrhage, previous gestational hypertensive disorders, multiple pregnancy, in vitro fertilization, gestational hypertensive disorder, anemia in third trimester, breech presentation, large for gestational age (LGA), gestational age at delivery and maternity unit status; adjusted for no prophylactic oxytocin after birth; after multiple imputation. †Adjusted for country of birth, living without partner, age, BMI, current smoker, pre-existing medical condition, parity and prior cesarean delivery, previous obstetric hemorrhage, previous gestational hypertensive disorders, multiple pregnancy, in vitro fertilization, gestational hypertensive disorder, anemia in third trimester, breech presentation, no prophylactic oxytocin after birth, LGA, gestational age at delivery and maternity unit status; after multiple imputation.

Association between cesarean delivery and severe acute intra- or postpartum maternal morbidity by maternal age. Note: CI = confidence interval, OR = odds ratio. *Variables for propensity score: country of birth, living without partner, maternal age, body mass index, smoker, pre-existing medical condition, parity and prior cesarean delivery, previous obstetric hemorrhage, previous gestational hypertensive disorders, multiple pregnancy, in vitro fertilization, gestational hypertensive disorder, anemia in third trimester, breech presentation, large for gestational age (LGA), gestational age at delivery, maternity unit status; adjusted for no prophylactic oxytocin after birth; after multiple imputation.†118 women with cesarean delivery matched with 118 women with vaginal delivery. ‡Adjusted for country of birth, living without partner, age, body mass index, smoker, pre-existing medical condition, parity and prior cesarean delivery, previous obstetric hemorrhage, previous gestational hypertensive disorders, multiple pregnancy, in vitro fertilization, gestational hypertensive disorder, anemia in third trimester, breech presentation, no prophylactic oxytocin after birth, LGA, gestational age at delivery, maternity unit status; after multiple imputation. §225 women with cesarean delivery matched with 225 women with vaginal delivery. ¶298 women with cesarean delivery matched with 298 women with vaginal delivery.**226 women with cesarean delivery matched with 226 women with vaginal delivery.