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Table 2 Labour outcomes of birth seat births compared to all other positions (ceacarean section excluded)

From: Striving for scientific stringency: a re-analysis of a randomised controlled trial considering first-time mothers’ obstetric outcomes in relation to birth position

 

Birth seat group

Control group

Crude

 

Adjusted

 
 

n= 253

n= 697

Odds Ratio

P-value

Odds Ratio

P-value

 

n (%)

n (%)

(95% CI)

 

(95% CI)

 

Duration of labour

      

First stage of labour in minutes*

397 (± 191)

465 (± 240)

0.99 (0.99 - 0.99)

<0.01

0.99 (0.99 - 1.00)

<0.01

Second stage of labour in minutes**

32 (± 18)

44 (± 27)

0.97 (0.70 - 0.98)

<0.01

0.97 (0.96 - 0.98)

<0.01

Third stage of labour in minutes***

14 (± 17)

13 (± 14)

1.00 (0.99 - 1.03)

0.34

1.00 (0.99 - 1.01)

0.22

Augmentation of labour

      

No augmentation

127 (50.2)

202(28.9)

1.0 Ref.

 

1.0 Ref.

 

Augmentation initiated during first stage of labour****

90 (35.6)

355 (50.9)

0.40 (0.29 - 0.56)

<0.01

0.74 (0.49 - 1.13)

0.17

Augmentation initiated during second stage of labour*****

36 (14.2)

140 (20.1)

0.66 (0.44 - 0.98)

0.04

0.49 (0.29 - 0.86)

<0.01

Epidural analgesia******

94 (37.0)

314 (45.0)

0.72 (0.54 - 0.97)

0.03

1.14 (0.75 - 1.73)

0.54

Blood loss*******

      

< 499 ml

86 (34.0)

355 (51.1)

1.0 Ref.

 

1.0 Ref.

 

500-999 ml

128 (50.6)

246 (35.1)

1.43 (1.22 - 1.68)

<0.01

2.20 (1.48 - 3.26)

<0.01

>1000 ml

39 (15.4)

96 (13.8)

1.67 (1.08 - 2.60)

0.02

2. 00 (1.19 - 3.37)

<0.01

Mean blood loss in ml. (SD)*******

709 (± 462)

592 (± 448)

117

<0.01

1.00 (1.00 - 1.01)

<0.01

Episiotomies*******

5 (2.0)

90 (13.7 )

0.15 (0.06 - 0.37)

<0.01

0.19 (0.07 - 0.54)

<0.01

Perineal lacerations*******

      

No laceration

10 (4.0)

40 (6.1)

1.0 Ref.

 

1.0 Ref.

 

1 degree

184 (73.8)

458 (69.8)

1.06 (0.97 - 1.15)

0.25

1.63 (0.70 - 3.80)

0.26

2.degree

42 (16.8)

118 (17.9)

1.93 (0.68 - 1.30)

0.77

1.53 (0.60 - 3.89)

0.37

3.degree

13 (5.2)

40 (6.1)

0.85 (0.47 - 1.57)

0.75

1.76 (0.60 - 5.29)

0.31

Oedema*******

      

1 (vas 0-3)

184 (85.2)

419 (83.4)

1.0 Ref.

 

1.0 Ref.

 

2 (vas 4-7)

30 (13.8)

70 (13.9)

0.99 (0.67 - 1.48)

1.00

1.79 (0.35 - 8.77)

0.51

3 (vas 8-10)

2 (0.9)

13 (2.6)

0.35 (0.08 - 1.57)

0.25

2.54 (0.48 - 13.64)

0.28

  1. * Adjusted for maternal age, BMI, smoking, cx status at admission, epidural, fetal head circumference, fetal weight, gestational age.
  2. ** Adjusted for maternal age, BMI, smoking, cx status at admission, epidural, fetal head circumference, fetal weight, gestational age, duration of first stage of labour and augmentation during first stage.
  3. ***Adjusted for maternal age, BMI, smoking, cx status at admission, epidural, fetal head circumference, fetal weight, gestational age, duration of first and second stages, augmentation during first and second stages.
  4. **** Adjusted for maternal age, BMI, smoking, cx status at admission, epidural, fetal head circumference, fetal weight, gestational age and duration of first stage of labour.
  5. *****Adjusted for maternal age, BMI, smoking, cx status at admission, epidural, fetal head circumference, fetal weight, gestational age, oxytocin augmentation in first stage of labour and duration of first and second stages of labour.
  6. ******Adjusted for maternal age, BMI, smoking, cx status at admission, fetal head circumference, fetal weight, gestational age, oxytocin augmentation in/and duration of first and second stages of labour.
  7. ******* Adjusted for maternal age, BMI, smoking, cx status at admission, epidural, fetal head circumference, fetal weight, gestational age, oxytocin augmentation in/and duration of first and second stages of labour.
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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