Table 1 Comparison of the general conditions of primiparas in each group

Height (cm)

162.9 (4.4)

162.8 (3.6)

163.6 (6.3)

163.7 (3.8)

163.1 (5.6)

Weight (kg)

70.1 (16.7)

70.7 (7.2)

73.3 (10.2)

74.1 (13.8)

69.0 (11.6)

BMI(kg/m²)

26.3(6.1)

26.8(3.3)

27.4(3.6)

27.6(4.7)

26.0(3.7)

Age (yr)

28.8 (3.4)

30.7 (3.2)

30.0 (3.5)

29.2 (3.2)

30.0 (2.9)

Gestational age (weeks)

39.3 (1.1)

39.4 (1.2)

39.4 (1.7)

39.6 (1.2)

39.5 (1.2)

Cervical dilatation (cm)

2.1 (0.3)

2.4 (1.1)

2.4 (0.8)

0.5 (0.8)

0.4 (0.50)

Educational background (High school and below/the University/Postgraduate)

4/25/1

3/25/2

3/26/1

2/23/2

3/19/4