Table 3 OR and 95% CIs for all CBTs combined and by brain tumour subtype in relation to type of prenatal X-ray exposure

From: Prenatal X-ray exposure and childhood brain tumours: a population-based case–control study on tumour subtypes

   

Crude

Adjusted a

 

Type of X-ray

Exposed ( N)

OR

95% CI

OR

95% CI

All brain tumoursb (n=503)

Abdominal

51

1.07

0.70–1.62

1.02

0.64–1.62

 

Non-abdominal

53

0.85

0.57–1.25

0.78

0.52–1.17

Astrocytoma low grade

Abdominal

15

0.83

0.45–1.53

0.72

0.36–1.42

 

Non-abdominal

24

1.01

0.61–1.68

0.96

0.57–1.62

Astrocytoma high grade

Abdominal

6

1.00

0.41–2.46

1.06

0.39–2.86

 

Non-abdominal

4

0.51

0.18–1.46

0.36

0.12–1.08

PNET

Abdominal

16

1.71

0.93–3.17

1.88

0.92–3.83

 

Non-abdominal

10

0.82

0.40–1.66

0.81

0.83–1.69

Ependymomac

Abdominal

3

1.01

0.34–2.98

—

—

 

Non-abdominal

6

1.16

0.47–2.87

—

—

Controls

Abdominal

48

    

(n=512)

Non-abdominal

63

    
  1. CBT=childhood brain tumour; CI=confidence interval; OR=odds ratio; PNET=primitive neuroectodermal tumour.
  2. aAdjusted for maternal age, parity, multiple birth, mother born in a Nordic country, gestational age at birth, mode of delivery, breech position, birth weight, birth head circumference, level of hospital and hypertension during pregnancy.
  3. bIncludes the subtypes in the table, germ cell tumours and other miscellaneous tumours. Only subjects with information on all variables adjusted for are included.
  4. cMultivariate analyses could not be performed because of the low number of cases.
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