Variable OR CI95% p
Sedation 3.44 (1.03 to 11.46) 0.044
Multiparity 3.53 (1.48 to 8.38) 0.004
Previous cesarean section 0.17 (0.01 to 1.96) 0.154
Maternal BMI, Kg/m2 0.89 (0.81 to 0.97) 0.006
Amniotic Fluid Pocket, mm 1.03 (1.01 to 1.06) 0.028