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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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