Trends in survival, neonatal morbidity and neurodevelopmental outcome of very preterm infants in Tainan, Southern Taiwan, 1995–2016

Background Using regression modeling analysis to investigate the breakpoints of the trends in survival-without-major-neonatal-morbidities (MNM) or -without-neurodevelopmental- impairment (NDI) by year and gestational age (GA) in preterm infants. Methods We enrolled 2237 preterm infants (GA  Results For yearly trend, there were three epochs (1995–2000, 2001–2006, 2007–2016) with distinct changes in the rates of survival-without-MNM (aRR [95% CI] 1.07 [1.02–1.12], 1.04 [1.02–1.07], 1.02 [1.01–1.04]) and -without-NDI (1.03 [1.02–1.07], 1.02 [1.01–1.04], 1.01 [0.98–1.04]). For GA trend, the three GA ranges with different increases in the rates of survival-without-MNM were 23+0-26+6 (1.60 [1.31–1.94]), 27+0-28+6 (1.24 [1.14–1.34]) and 29+0-31+6 weeks (1.17 [1.02–1.34]), while those in the rates of survival-without-NDI were 23+0-25+6 (1.14 [1.03–1.25]), 26+0-28+6 (1.06 [1.02–1.12]) and 29+0-31+6 weeks (1.04 [1.02–1.07]). The trends in survival-without-MNM and -without-NDI increased over years in infants with GA 25–31 but not Conclusion The yearly trends in survival-without-MNM and -without-NDI had steady increases from 1995 to 2016 with distinct changes in three epochs, and the GA trends also increased with different rates per week in three GA ranges. Infants with GA