Table 4 Observed and expected breast cancers among daughters by calendar year of cancer diagnosis
From: Risk of breast cancer among daughters of mothers with diabetes: a population-based cohort study
Number of breast cancer cases | ||||
|---|---|---|---|---|
Year of breast cancer diagnosis | Observed | Expected | SIR | 95% CI |
Until1989 | 1,397 | 1,822 | 0.77 | (0.73 to 0.81) |
1990 to 1999 | 3,050 | 3,477 | 0.88 | (0.85 to 0.91) |
2000 and onwards | 3,509 | 3,904 | 0.90 | (0.87 to 0.93) |