Biodemographic Analysis of Factors Related to Perinatal Mortality in Portugal (1988–2011)

Figure 1

Yearly stillbirth and early neonatal and perinatal mortality rates (×1000) for total deliveries and gestations ≥22 and ≥26 weeks. Period 1996–2009: values of gestations ≥26 weeks estimated by linear regression on the total rates (corrected R² = 0.998, 0.986 and 0.992, resp., for each type of mortality). For stillbirths, also gestations ≥22 weeks estimated by linear regression on the total rate (corrected R² = 0.998).