Group A (n = 69)

Group B (n = 20)

p-value

Maternal age (year)

34.5 ± 0.6

33.4 ± 1.1

0.24

Parity

1.70 ± 0.1

0.55 ± 0.2

<0.001

Gestational age at birth (wks)

37.9 ± 0.1

38.1 ± 0.1

0.45

Neonatal weight at birth (g)

2823 ± 42.2

2957 ± 78.4

0.10

Number of previous CDs

1 (1 - 4)

Interval time from the last CD (month)

35 (14 - 156)