The preterm premature rupture of membranes ( 16 vs. 8 % ; p = 0.03 ) , preterm delivery rate ( 11 vs. 5 % ; p = 0.04 ) and low birth weight infants rate ( < 2,500 g ) ( 10 vs. 6 % ; p = 0.04 ) 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 .