Characteristics

placebo group

n = 64

HBB group

n = 59

P-value

Age (years)

30.2 ± 4.8

29.9 ± 4.9

0.686

Height (m)

1.6 ± 0.1

1.6 ± 0.1

0.808

Weight (kg)

79.3 ± 17.3

79.9 ± 12.0

0.814

Parity

Nulliparous

multiparous

24 (47.8)

40 (52.2)

20 (45.7)

39 (54.3)

0.710

Gestational age (weeks)

39.3 ± 1.0

39.4 ± 1.1

0.479

Cervical dilatation at presentation (cm)

4.5 ± 0.5

4.5 ± 0.6

0.373

Spontaneous rupture of membrane

26 (40.6)

22 (37.3)

0.705