Compared to the @ weeks group , the women in the @ weeks group were more likely to have an unscheduled caesarean section ( @ % vs. @ % ; RR @ , @ % CI @ ; @ ) , to deliver between @ pm and @ am ( @ % vs. @ % ; RR @ , @ % CI @ ; @ ) , or to have the procedure rescheduled ( @ % vs. @ % ; RR @ , @ % CI @ ; @ ) .