Median maternal gestational age was 26 weeks at enrolment.
Alberman et al. [ 36] found a negative association between maternal gestational age and newborn birth weight.
Literature shows, however, that maternal birth weight has a stronger correlation with newborn birth weight than maternal gestational age.
There are a total of 1440 singleton babies with complete information on birth weight, gender, and maternal gestational age for the analysis.
Information about maternal gestational age was only available for 29% of the women who participated in this research, of which 95.1% were full-term newborns, 8.0% had low birth weight (<2,500 g), and 18.6% had increased birth weight (≥3,500 g).
The surveys included the following baseline variables: education level, job status, computer or internet user or not and maternal gestational age at the time of the interview (Tables 1 and 2).>> -wrap-foot> Omnibus Likelihood Ratio between maternal characteristics and final maternal choice (chi-square [df], p-value); 11.8 [ 10], 0.29).
† ORs were adjusted by geographical location, maternal residence, maternal age, maternal education, gestational age, birthweight, non-isolated omphalocele and diagnosis by prenatal ultrasonography.
The following variables were considered in our analysis: geographical location, maternal residence, maternal age, maternal education, gestational age, birthweight, presence or absence of other anomalies, prenatal or postnatal diagnosis, and the year of birth.
In the multilevel multivariable logistic regression procedure, models were first adjusted for confounding by maternal characteristics (maternal age, gestational age, ethnic background, urbanisation, SES).
This association was adjusted for newborn's sex, maternal age, maternal education, gestational age, cord blood insulin, placental biopsy site, delivery date, season at birth, and NO2 exposure.
We agree that the main nonpathological factors affecting birth weight not only are associated with the maternal age, gestational age, maternal prepregnancy BMI, and parity, but also could be due to ethnic group and paternal characteristics [ 1].
