B S.E. Exp(B) Sig.
Type of Intervention 0.735 0.371 2.085 0.048
Maternal age -0.008 0.036 0.992 0.816
Gestational age at the time of referral -0.291 0.103 0.747 0.005
Gravidity 0.283 0.223 1.327 0.204
BMI -0.062 0.051 0.939 0.224
Constant 10.783 3.908 48189.401 0.006