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Background: Although socioeconomic disparities adversely affect health, studies referring to the "healthy immigrant effect" imply more favorable health outcomes in immigrants than natives. We aimed to investigate the impact of immigration on several perinatal parameters., Methods: Birth records (01/01/2010 - 31/12/2014) from a public maternity hospital in Athens, Greece were reviewed for maternal (ethnicity, age, delivery mode) and neonatal (gender, birthweight, gestational age) variables. Immigrants were classified by country of origin, according to Human Development Index. Comparison of results between Greeks and immigrants were made. Stratification by maternal age (< and ≥35 years) was conducted to test for confounding and interaction., Results: Almost one-third of 7506 deliveries applied to immigrants; 36.3% of Greeks and 19.2% of immigrants [risk ratio (RR) = 0.53, 95% confidence interval (CI) = 0.52-0.54] delivered at ≥35 years; 10.5% of Greek and 7.0% of immigrant neonates weighted <2500 g (RR = 0.67, 95% CI = 0.61-0.74); 10.9% of Greeks and 8.1% of immigrants were born <37 wks (RR = 0.74, 95% CI = 0.67-0.82); 55.7% of Greeks and 48.2% of immigrants delivered by caesarean section (RR = 0.87, 95% CI = 0.85-0.88)., Conclusion: We found that immigrant women deliver at a younger age, vaginally, more mature, and heavier neonates. Furthermore, we confirmed that the protective effect of immigrant status could not be explained by maternal age only.

Since 2008, Greece suffers a severe economic crisis. Adverse health outcomes have been reported, but studies on perinatal health are sparse. We aimed to examine the impact of economic crisis on perinatal parameters during early and established crisis periods. Birth records of 14 923 neonates, born in a public maternity hospital from 2005-2014, were reviewed for maternal (age, delivery mode) and neonatal (gender, birthweight, gestational age) variables. Univariable analysis tested the association of study variables with time-periods 2005-2007, 2009-2011 and 2012-2014. Multivariable logistic regression analysis identified factors independently associated with low birthweight (LBW) (<2500 g), prematurity (<37 weeks) and caesarean section (CS). During 2012-2014, compared to 2005-2007, LBW rate increased from 8.4 to 10.5% (RR 1.16; 95%CI 1.01-1.33); prematurity from 9.7 to 11.2% (RR 1.09; 95%CI 0.96-1.24), comprising mainly late-preterm neonates; CS from 43.2 to 54.8% (RR 1.21; 95%CI 1.16-1.26). Maternal age ≥30 years was risk factor for LBW, prematurity and CS; LBW was additional risk factor for CS. However, LBW and CSs increased during the study period, independently of maternal age. In conclusion, impaired perinatal parameters, manifested by increasing maternal age, LBW, prematurity and CS rate, were observed during the years of economic decline, with possible adverse consequences for later health. [ABSTRACT FROM AUTHOR]