In the analysis, we adjusted for potential confounding by the women's year of birth (5 year categories), age at delivery (5 year categories), length of gestation (completed weeks), parity, and marital status, using Cox regression analysis (Stata Statistical Software: Release 9, College Station, TX, USA).
Patients assigned to the categories of multiple gestation, fetal malpresentation, delivery at <36 weeks' gestation, and not eligible for trial of labor were considered to compose the group at high risk for cesarean delivery.
For women who delivered preterm, we determined category of gestational weight gain according to guidelines for the completed week of gestation that delivery occurred.
The secondary objective was to compare effects in different age categories (perinatal (28 weeks of gestation to 1 week of age), neonatal (0 27 days), infant (0 11 months) and child (0 59 months) mortality).
The secondary objective was to compare effects in different age categories (perinatal (28 weeks of gestation to 1 week of age), neonatal (0 27 days), infant (0 11 months), child (0 59 months) mortality).
Infants were categorized into term (≥37 weeks), preterm (<37 weeks), and very preterm (<34 weeks) gestational age categories based on completed weeks of gestation.
We divided duration of pregnancy into three categories: term birth (≥37+0 weeks of gestation), moderate preterm birth (32+0 to 36+6 weeks), and very preterm birth (≤31+6 weeks).
* p < 0.05 No significant mean differences in any measure of birth size (including percentiles, ratios or indices) were observed across categories of fish consumption and gestation.
Weeks of gestation, with category boundary established at 37 weeks, was associated with risk of malformation, with a more frequent presence of cryptorchidism and/or hypospadias in the group of lower gestational age (OR = 1.98; 95% CI, 0.88 4.46), and this risk was higher in the conditional logistic analysis [crude OR (COR) = 4.18; 95% CI, 0.75 23.34; AOR = 2.29; 95% CI, 0.38 13.74].
The relationship between the results of the OGTT performed between 24 and 32 weeks of gestation (in six categories) and various pregnancy outcome measures (birth weight ≥90th percentile for gestational age, BMI ≥85th or 95th percentiles at age 2 years) were assessed using the χ test for trend.
