Table 2 Crude age-specific breast cancer (BC) incidence rate ratios (IRRs) and incidence-based mortality rate ratios (IBMRRs) with 95% confidence intervals in Turku (TKU) in comparison with the rest of Finland (RoF) and Helsinki (HEL)

From: Mammography screening in three Finnish residential areas: comprehensive population-based study of breast cancer incidence and incidence-based mortality 1976–2009

 

Incidence

BC-related risk of mortality by year of diagnosis

BC-related risk of mortality by year of death

TKU vs RoF

 40–49

   

 1976–1986

1.20* (1.01–1.44)

1.24 (0.93–1.65)

1.48 (0.97–2.25)

 1987–2009

1.16** (1.06–1.27)

0.90 (0.71–1.16)

1.08 (0.77–1.53)

 50–59

   

 1976–1986

1.18* (1.00–1.38)

1.08 (0.85–1.37)

1.13 (0.86–1.49)

 1987–2009

1.13*** (1.06–1.22)

1.06 (0.86–1.30)

0.89 (0.71–1.11)

 60–74

   

 1976–1986

1.26*** (1.12–1.41)

1.09 (0.90–1.32)

1.02 (0.84–1.24)

 1987–2009

1.29*** (1.22–1.38)

0.94 (0.79–1.11)

0.98 (0.83–1.16)

 75–84

   

 1976–1986

1.28** (1.08–1.51)

1.05 (0.79–1.40)

1.21 (0.97–1.50)

 1987–2009

1.03 (0.93–1.14)

0.77 (0.59–1.00)

0.86 (0.71–1.05)

TKU vs HEL

 40–49

   

 1976–1986

0.88 (0.72–1.07)

0.85 (0.62–1.17)

1.04 (0.65–1.67)

 1987–2009

0.98 (0.89–1.09)

0.83 (0.63–1.09)

0.98 (0.66–1.44)

 50–59

   

 1976–1986

0.77** (0.65–0.91)

0.75* (0.58–0.98)

0.90 (0.66–1.22)

 1987–2009

0.97 (0.89–1.05)

0.82 (0.65–1.03)

0.83 (0.66–1.07)

 60–74

   

 1976–1986

0.87* (0.76–0.98)

0.84 (0.68–1.04)

0.68*** (0.55–0.85)

 1987–2009

0.92* (0.86–0.99)

0.64*** (0.53–0.77)

0.65*** (0.54–0.78)

 75–84

   

 1976–1986

0.87 (0.72–1.05)

0.89 (0.65–1.22)

0.89 (0.69–1.13)

 1987–2009

0.77*** (0.69–0.86)

0.64** (0.47–0.85)

0.67*** (0.54–0.84)

  1. *P0.05, **P0.01, ***P0.001.
  2. Data are shown for four age groups in the prescreening era (1976–1986) and the screening period (1987–2009).