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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.