Liu, Z.

activity 0.0 birth trimester birth weight pregnancy outcome algorithm tardiness problem weight effect tardiness study \0.001 sequence research problem preterm table shift health women instance 100.0 preterm birth subproblem association variable measure birth outcome j obstet gynecol dc ðq þ. status smoking analyses night signi order operation preterm delivery history delivery fi rst trimester question signi ficant variables sp list job i position number heuristic machine birth outcomes liu / computers duration combination birth outcome measures ficant job sequences decomposition obstet questionnaire fi ndings univariate analyses shift work pregnancy outcome alspac 0.01 section fi rst exercise leisure epidemiol gynecol regression 0.1 computer value effect modi fiers property nding