Fig 1.
Flow chart of subjects in the Brazilian Multicentre Study on Preterm Birth.
Table 1.
Prevalence of provider-initiated preterm births in a sample of selected tertiary referral Brazilian maternities according to geographical region, gestational age and delivery indications.
Table 2.
Fetal and maternal indications for pregnancy interruption and characteristics of obstetric care according to gestational age in provider-initiated preterm births (n = 1,468).
Fig 2.
Caesarean section rates according to gestational age in provider-initiated preterm birth (n = 1,468) and term births.
Mode of delivery according to the World Health Organization´s gestational age categories are significantly different (p<0.001).
Fig 3.
Neonatal outcomes according to gestational age in provider-initiated preterm birth (n = 1,468) and term births.
Missing information for: (a) 20; (b) 131; (c) 5; (d) 13. All differences are statistically significant (p<0.001).
Table 3.
Risk estimates for provider-initiated preterm birth according to some maternal sociodemographic conditions.
Table 4.
Risk estimates for provider-initiated preterm birth according to maternal obstetric history.
Table 5.
Risk estimates for provider-initiated preterm birth according to some conditions during pregnancy.
Table 6.
Variables independently associated with provider-initiated preterm birth in all women studied: multiple analyses by non-conditional logistic regression [n = 2059].