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Table 3 Birthweight distributions and odds ratios for breast cancer in African-American and white women combined

From: Birthweight, parental age, birth order and breast cancer risk in African-American and white women: a population-based case–control study

 

Minimally adjusted ORa

Fully adjusted ORb

 

Cases

Controls

ORa

95% CI

Cases

Controls

ORb

95% CI

Full birthweight dataset

n = 196

n = 167

  

n = 191

n = 161

  

   Lower tertilec

73

57

0.9

0.6–1.6

72

55

1.0

0.6–1.7

   Central tertile

70

54

Ref.

 

69

51

Ref.

 

   Upper tertile

53

56

0.7

0.4–1.2

50

55

0.7

0.4–1.2

   Mean ± SD (g)

 

3262 ± 550

      

   Median (g)

 

3232

      

   Range (g)

 

1021–4621

      

Restricted datasetd

n = 147

n = 100

  

n = 143

n = 97

  

   Lower tertilec

59

43

0.9

0.5–1.7

58

41

1.0

0.5–0.9

   Central tertile

48

32

Ref.

 

47

31

Ref.

 

   Upper tertile

40

25

1.0

0.5–2.1

38

25

0.9

0.4–1.9

   Mean ± SD (g)

 

3210 ± 482

      

   Median (g)

 

3232

      

   Range (g)

 

2041–4621

      
  1. aAdjusted for age, race and sampling fractions. bAdjusted for age, race, sampling fractions, history of previous biopsy, maternal age, and adult body mass index >25 kg/m2. cTertiles are race specific with cutpoints derived from controls. White women: <3062 g, 3062–3458 g, >3458 g; African American women: <3146 g, 3146–3486 g, >3486 g. dBirthweight measured in pounds and ounces and participant delivered in a medical facility by a physician. CI, confidence interval; OR, odds ratio.
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Breast Cancer Research

ISSN: 1465-542X

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