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Table 2 Observed and expected breast cancers among daughters of mothers with diabetes by age at cancer diagnosis

From: Risk of breast cancer among daughters of mothers with diabetes: a population-based cohort study

  Number of breast cancer cases   
Age of daughter at diagnosis of breast cancer Observed Expected SIR 95% CI
< 55 4,430 5,332 0.83 (0.81 to 0.86)
≥ 55 3,526 3,872 0.91 (0.88 to 0.94)
  1. CI, confidence interval; SIR, standardized incidence ratio.