Table 4

Age and multivariate-adjusted relative risks of postmenopausal breast cancer associated with self-reported ethnicity and family history

EthnicityFamily historyNo. of casesAge-adjusted RRMultivariate-adjusted RRa95% CI
IrishNo801.001.00
Yes131.211.260.70–2.28
English, Scottish, Welsh, DutchNo2561.001.00
Yes671.871.821.38–2.39
GermanNo3351.001.00
Yes701.431.371.04–1.80
Norwegian, SwedishNo1111.001.00
Yes161.081.040.60–1.79
Other EuropeanNo791.001.00
Yes151.481.520.87–2.66
  • a Adjusted for age, age at menarche, age at menopause, ever pregnant, number of pregnancies, age at first pregnancy, educational level, BMI, WHR, and alcohol consumption.