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Table 1 Observed and expected breast cancers among daughters by mother's age at diagnosis of diabetes

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

 

Number of breast cancer cases

  

Age of mother at diagnosis of diabetes (years)

Observed

Expected

SIR

95% CI

Up to 49

911

1072

0.85

(0.80 to 0.91)

50 to 59

353

463

0.76

(0.69 to 0.85)

60 to 69

1,458

1,685

0.87

(0.82 to 0.91)

70 to 79

2,868

3,358

0.85

(0.82 to 0.89)

80 to 89

2,366

2,626

0.90

(0.86 to 0.94)

Total

7,956

9,204

0.86

(0.85 to 0.88)

  1. CI, confidence interval; SIR, standardized incidence ratio.