Gender, smoking during pregnancy and gestational age influence cord leptin concentrations in newborn infants.

In our study, although comparison of cord serum leptin concentrations between infants born to smokers and those of non-smokers did not reach statistical significance (univariate analysis), multiple regression analysis performed with cord serum leptin concentration as dependent variable tends to suggest that infant's gender, BW, gestational length and maternal smoking during gestation were the more significant independent variables that influenced cord serum leptin concentrations.

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