Limpens, R.

activity birth trimester birth weight pregnancy outcome weight effect study \0.001 preterm shift health women preterm birth association variable measure birth outcome j obstet gynecol status smoking table analyses night signi preterm delivery history delivery fi rst trimester question signi ficant variables birth outcomes duration birth outcome measures ficant obstet questionnaire fi ndings univariate analyses shift work pregnancy outcome alspac 0.01 exercise leisure epidemiol gynecol regression value effect modi fiers nding alcohol survival univariate leisure time cohort assessment susser m multivariate analyses fidence interval j epidemiol response -0.01 confounder research level gestation interval regression coef ficient information response options maternal-child health outcomes hypertension child activity assessment measures alspac study team signi ficant association number fidence