Logistic regression analysis, controlling for factors that differed
between patients with and without preterm birth at o32 weeks on
bivariate analysis, confirmed associations with preterm birth at o32 weeks
with monochorionicity, short cervical length and inadequate gestational weight gain
at 20 to 28 weeks . Inadequate gestational weight gain at 20 to 28 weeks
had the strongest association with preterm birth