Table 1 Comparison of demographic data and clinical characteristics between women with cervical os dilatation of 4 cm and 6 cm, n = 3980

Mean maternal age ± SD, years

29.3 ± 4.4

29.5 ± 4.5

0.343^a

Group Age (years), n (%) 

0.205^b

 18–29

1849 (54.3)

296 (51.3)

 30–39

1503 (44.2)

268 (46.4)

  ≥ 40

51 (1.5)

13 (2.3)

Mean maternal weight at delivery ± SD, kg

69.7 ± 12.3

68.3 ± 12.1

0.015^a

Mean gestational age at delivery ± SD, weeks

39.2 ± 1.0

39.1 ± 1.0

0.917^a

Ethnicity, n (%)

0.125^b

 Malay

2568 (75.5)

418 (72.4)

 Non-Malay

835 (24.5)

159 (27.6)

  Chinese

477 (57.1)

93 (58.5)

  Indian

66 (8.0)

6 (3.8)

  Others

292 (34.9)

60 (37.7)

Parity, n (%)

< 0.001^b

 Nulliparous

1251 (36.8)

170 (29.5)

-

 Multiparous

2152 (63.2)

407 (70.5)