Skip to main content

Table 1 Background variables in relation to randomization

From: No reduction in instrumental vaginal births and no increased risk for adverse perineal outcome in nulliparous women giving birth on a birth seat: results of a Swedish randomized controlled trial

 

Experimental group

Control group

 

n = 500

n = 502

 

n (%)

n (%)

Age groups

  

<25 years

95 (19.0)

80 (15.9)

25-35 years

360 (72.0)

361 (72.0)

> 35 years

45 (9.0)

61 (12.1)

Smoking

55 (11.0)

66 (13.0)

Previous caesarean section

6 (1.2)

5 (1.0)

Gestational Age

  

<37 + 6 weeks

19 (3.8)

22 (4.4)

38 + 0 - 40 + 6 weeks

381 (76.2)

376 (74.9)

>41 + 0 weeks

100 (20.0 )

104 (20.7)

Body Mass Index (BMI)

23.3

23.6

Antenatal Hb in g/l (SD)

126 (± 11)

124 (± 13)

Back to article page

BMC Pregnancy and Childbirth

ISSN: 1471-2393

Contact us