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- W3018442871 abstract "Background Small for gestational age (SGA) birthweight, a risk factor of infant mortality and delayed child development, is associated with maternal educational attainment. Maternal tobacco smoking during pregnancy could contribute to this association. We aimed to quantify the contribution of maternal smoking during pregnancy to social inequalities in child birthweight for gestational age (GA). Methods Data come from the French nation-wide ELFE cohort study, which included 17,155 singletons. Birthweights for GA were calculated using z-scores. Associations between maternal educational attainment, tobacco smoking during pregnancy and child birthweight for GA were ascertained using mediation analysis. Mediation analyses were also stratified by maternal pre-pregnancy body mass index.Results Low maternal educational attainment was associated with an increased odd of tobacco smoking during pregnancy (adjusted OR (ORa)=2.58 [95% CI 2.34, 2.84]) as well as a decrease in child birthweight for GA (RRa=0.94 [95% 0.91, 0.98]). Tobacco smoking during pregnancy was associated with a decrease in offspring birthweight for GA (RRa=0.73 [95% CI 0.70, 0.76]). Mediation analysis suggests that 39% of the effect of low maternal educational attainment on offspring birthweight for GA was mediated by smoking during pregnancy. A more important direct effect of maternal educational attainment on child birthweight for GA was observed among underweight women (RRa=0.82 [95%CI 0.72, 0.93]).Conclusions The relationship between maternal educational attainment and child birthweight for GA is strongly mediated by smoking during pregnancy. Reducing maternal smoking could lessen the occurrence of infant SGA and decrease socioeconomic inequalities in birthweight for GA.Keywords Birthweight, educational attainment, tobacco smoking, pregnancy, mediation analysis, health inequalities" @default.
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- W3018442871 date "2020-04-21" @default.
- W3018442871 modified "2023-10-16" @default.
- W3018442871 title "Maternal education and offspring birthweight for gestational age: the mediating effect of smoking during pregnancy" @default.
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