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Table 4 Birthweight distributions and odds ratios for breast cancer among African-American and white women by race

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

 

African-American

White

African-American

White

 

Cases

Controls

ORa

95% CI

Cases

Controls

ORa

95% CI

Cases

Controls

ORb

95% CI

Cases

Controls

ORb

95% CI

Full birthweight dataset

n = 86

n = 89

  

n = 110

n = 78

  

n = 83

n = 85

  

n = 108

n = 76

  

   Lower tertilec

38

30

1.0

0.5–2.1

35

27

0.9

0.4–1.8

38

29

1.1

0.5–2.2

34

26

0.9

0.4–2.0

   Central tertile

33

29

Ref.

 

37

25

Ref.

 

32

27

Ref.

 

37

24

Ref.

 

   Upper tertile

15

30

0.5

0.2–1.0

38

26

1.0

0.5–2.1

13

29

0.4

0.2–1.0

37

26

0.9

0.4–2.0

   Mean ± SD (g)

 

3251 ± 584

   

3276 ± 513

          

   Median (g)

 

3211

   

3239

          

   Range (g)

 

1021–4536

   

1843–4734

          

Restricted datasetd

n = 49

n = 37

  

n = 98

n = 63

  

n = 47

n = 36

  

n = 96

n = 61

  

   Lower tertilec

26

19

0.7

0.3–2.0

33

24

1.0

0.4–2.1

26

18

0.8

0.3–2.4

32

23

1.1

0.5–2.4

   Central tertile

17

9

Ref.

 

31

23

Ref.

 

16

9

Ref.

 

31

22

Ref.

 

   Upper tertile

6

9

0.4

0.1–1.4

34

16

1.5

0.7–3.4

5

9

0.3

0.1–1.2

33

16

1.4

0.6–3.2

   Mean ± SD (g)

 

3184 ± 463)

   

3225 ± 497)

          

   Median (g)

 

3147

   

3232

          

   Range (g)

 

2296–4337

   

2041–4621

          
  1. aAdjusted for age and sampling fractions. bAdjusted for age, 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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