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Table 5 Delivery regression results

From: Impact of obstetric interventions on condition at birth in extremely preterm babies: evidence from a national cohort study

Model

 

N

≤24 weeks

25 weeks

26 weeks

P-valuea

   

OR

(95% CI)

OR

(95% CI)

OR

(95% CI)

 

Condition at birth

        
 

Baseline

1717

3.89

(2.00 – 7.58)

1.85

(1.02 – 3.34)

1.22

(0.69 – 2.18)

0.031

 

Baseline: no labour

1712

13.5

(3.50 – 52.08)

4.13

(1.35 – 12.62)

0.98

(0.11 – 8.41)

0.018

 

Baseline: spontaneous labour

 

1.79

(0.76 – 4.24)

1.95

(0.79 – 4.79)

0.75

(0.35 – 1.58)

 
 

Clinical: no labourb

1680

22.96

(5.19 – 101.52)

8.24

(2.49 – 27.33)

2.22

(0.24 – 20.16)

0.001

 

Clinical: spontaneous labourb

 

1.18

(0.47 – 2.96)

2.01

(0.80 – 5.08)

0.71

(0.33 – 1.54)

 
 

Complete: no labourc

1680

12.67

(2.79 – 57.60)

4.94

(1.44 – 16.90)

1.56

(0.16 – 14.81)

<0.001

 

Complete: spontaneous labourc

 

0.95

(0.38 – 2.40)

1.58

(0.62 – 4.03)

0.70

(0.32 – 1.52)

 

Delivery room death

        
 

Baseline

1717

0.24

(0.12 – 0.50)

0.79

(0.39 – 1.63)

0.63

(0.24 – 1.70)

0.055

 

Baseline: no labour

1712

0.05

(0.01 – 0.23)

0.20

(0.06 – 0.67)

0.39

(0.04 – 3.76)

0.019

 

Baseline: spontaneous labour

 

0.56

(0.23 – 1.35)

0.82

(0.27 – 2.44)

0.65

(0.14 – 2.97)

 
 

Clinical: no labourb

1680

0.01

(0.00 – 0.09)

0.06

(0.02 – 0.25)

0.09

(0.01 – 1.03)

<0.001

 

Clinical: spontaneous labourb

 

0.96

(0.36 – 2.55)

0.77

(0.25 – 2.43)

0.63

(0.13 – 3.00)

 
 

Complete: no labourc

1680

0.03

(0.01 – 0.21)

0.13

(0.03 – 0.55)

0.12

(0.01 – 1.63)

<0.001

 

Complete: spontaneous labourc

 

1.36

(0.50 – 3.70)

1.07

(0.33 – 3.46)

0.63

(0.13 – 3.00)

 
  1. Odds ratios of the effect of delivery by caesaerean section on the presence of a heart rate greater than 100 at minutes of age or to delivery room death in the complete population of babies born at 22–26 completed weeks of gestation in England in 2006 who were known to be alive at admission to hospital and at the start of labour monitoring or delivery to perform Caesarean section
  2. aLikelihood ratio test comparing model against next simplest model
  3. bThe clinical models were additionally adjusted for: antenatal steroids, in utero transfer, maternal pre-eclampsia and placental abruption
  4. cThe complete models were adjusted for the same factors as the clinical models, plus: who the parents were counselled by, whether a decision was made not to perform Caesarean section in cases of fetal distress, what choice was expressed for resuscitation, and whether withholding care was discussed
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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