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Table 4 Logistic regression (odds ratios) for intra– and extracranial hemorrhages, convulsions and other cerebral complications, and brachial plexus injury in preterm infants exposed to different modes of delivery

From: Preterm birth by vacuum extraction and neonatal outcome: a population-based cohort study

Mode of delivery

N

n

1/1000

Crude OR

AOR model 1

AOR model 2

    

(95% CI)

(95% CI)

(95% CI)

   

Intracranial hemorrhage

Vaginal

32,938

486

14.8

1.0

1.0

1.0

CS during labor

5,507

105

19.1

1.30 (1.05–1.61)

0.73 (0.58–0.92)

0.76 (0.58–0.98)

VE

2,319

26

11.2

0.76 (0.51–1.13)

2.05 (1.34–3.15)

1.84 (1.09–3.12)

Total

40,764

617

15.1

   
 

Subgaleal– and/or cephalhematoma

Vaginal

32,938

166

5.0

1.0

1.0

1.0

CS during labor

5,507

10

1.8

0.36 (0.19–0.68)

0.42 (0.22–0.81)

0.36 (0.18–0.70)

VE

2,319

83

35.8

7.33 (5.61–9.57)

5.89 (4.46–7.78)

4.48 (2.84–7.07)

Total

4,0764

259

6.4

   
    

Neonatal convulsions

 

Vaginal

32,938

109

3.3

1.0

1.0

1.0

CS during labor

5,507

45

8.2

2.48 (1.75–3.52)

1.95 (1.36–2.79)

1.42 (0.92–2.17)

VE

2,319

15

6.5

1.96 (1.14–3.37)

2.51 (1.44–4.38)

1.48 (0.73–3.01)

Total

40,764

169

4.1

   
    

Other disturbances of neonatal cerebral status

 

Vaginal

32,938

98

3.0

1.0

1.0

1.0

CS during labor

5,507

53

9.6

3.26 (2.33–4.55)

2.27 (1.60–3.23)

1.61 (1.06–2.45)

VE

2,319

17

7.3

2.47 (1.48–4.15)

3.84 (2.24–6.56)

2.15 (1.09–4.27)

Total

40,764

168

4.1

   
    

Plexus brachialis injury

 

Vaginal

32,938

37

1.1

1.0

1.0

1.0

CS during labor

5,507

2

0.4

0.32(0.08–1.34)

0.29 (0.07–1.23)

0.29 (0.07–1.26)

VE

2,319

14

6.0

5.40 (2.92–10.00)

6.45 (3.32–12.5

6.21 (2.22–17.4)

Total

40,764

53

1.3

   
  1. CS = cesarean section, VE = vacuum extraction.
  2. Model 1 is adjusted for year of birth, gestational age, parity, maternal age, height, BMI, and infant birthweight.
  3. Model 2 is also adjusted for indications for operative delivery.