Trends in gestational age at birth in the city of Sao Paulo, Brazil between 2012 and 2019.

ABSTRACT: Studies have shown that excessive obstetric interventions such as induced labor and caesarean sections have contributed to the shortening of the length of gestation, leading to a left shift in gestational age (GA) at birth. The aim of this study was to analyze trends in GA and the contribution of associated factors to changes in São Paulo city, Brazil during the period 2012-2019. We conducted an observational time-series study of births in São Paulo using data from Brazil's national live births information system (SINASC). We calculated the annual percent change (APC) of births by GA between 2012 and 2019 and between the first and second four-year periods of the time series by applying log transformation to the percentages, followed by Prais-Winsten regression. A total of 1,525,759 live bi

SUBMITTER: Lira MMTA 

PROVIDER: S-EPMC12416724 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature