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Table 5 Parental age distributions and odds ratios for breast cancer among 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
  Case Control OR 95% CI Case Control OR 95% CI
Maternal age (years)c n = 280 n = 236    n = 263 n = 235   
   15–18 31 31 1.8 0.9–3.4 30 29 1.8 0.9–3.5
   19–22 (ref.) 51 80 Ref.   48 77 Ref.  
   23–27 87 49 3.0 1.8–5.0 85 48 3.5 2.0–5.9
   28–44 111 77 2.5 1.6–4.0 100 81 3.0 1.8–5.2
   Mean ± SD 26.5 ± 6.5 25.2 ± 6.7       
   Median 26 23       
   Range 17–43 15–43       
Paternal age (years)d n = 266 n = 218    n = 251 n = 206   
   15–22 39 35 1.0 0.6–1.8 38 33 1.6 0.8–3.1
   23–27 (refs) 73 70 Ref   69 65 Ref  
   28–34 87 67 1.3 0.8–2.1 83 62 1.2 0.7–2.2
   35–56 67 46 1.6 0.9–2.6 61 46 1.5 0.7–3.2
   Mean ± SD 30 ± 7.1) 29.5 ± 7.5)       
   Median 29 28       
   Range 17–53 15–56       
  1. aAdjusted for age, race, and sampling fractions. bAdjusted for age, race, sampling fractions, and other covariates as specified. cAdditional covariates for fully adjusted OR: household income ≥$30,000 and birth order.dAdditional covariates for fully adjusted OR: adult body mass index >25 kg/m2, household income ≥$30,000, birth order, and maternal age.
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