The preterm premature rupture of membranes ( @ vs. @ % ; p = @ ) , preterm delivery rate ( @ vs. @ % ; p = @ ) and low birth weight infants rate ( < @,@ g ) ( @ vs. @ % ; p = @ ) were higher in the CKC group than in the LEEP group , but there was no difference in mean birth weight , cesarean delivery , labor induction , or neonatal intensive care unit admission .