Variable

Successful (n = 115)

failed (n = 35)

t-test

P value

Birth weight (gm):

Mean ± SD

3190.4 ± 346.9

3636.6 ± 386.7

3.13

0.035 (S)

Gestational age (weeks):

Mean ± SD

38.9 ± 1.0

39.1 ± 0.9

0.853

0.395 (NS)

BMI (Kg/m²):

Mean ± SD Range

27.6 ± 2.9

(21.6 - 34)

29.0 ± 2.6

(22 - 36.4)

2.55

0.011 (S)

Cervical length (mm):

Mean ± SD

32.4 ± 3.0

33.6 ± 2.5

2.03

0.044 (S)

Uterocervical angle (˚):

Mean ± SD

115.4 ± 11.4

109.5 ± 7.8

2.86

0.004 (S)