Table 3

Incidence-based mortality studies for the evaluation of mammography screening effectiveness in Denmark and in Norway.

Years included in study

Year of screening introduction in screening areas

Age groups

BC mortality rate in the pre-screening period (historical control)

BC mortality rate in the screening period

Ratio of BC mortality rates, screening versus pre-screening perioda

Ratio of BC mortality rates, screening versus non-screening areasa


Screening areas

No screening

Screening

Denmark, Olsen et al. 2005 [28]

1981 to 2001

1991

50 to 79

69

52

0.75

0.74

Norway, Kalager et al. 2010 [33]

1986 to 2005

1996

50 to 84

33

24

0.73

0.9

Norway, Olsen et al. 2012 [34]

1990 to 2008

1996

50 to 84

35

27

0.77

0.91

Comparison (non-screening) areas

No screening

No screening

Denmark, Olsen et al. 2005 [28]

1981 to 2001

-

50 to 79

52

53

1.02

reference

Norway, Kalager et al. 2010 [33]

1986 to 2005

-

50 to 84

31

25

0.81

reference

Norway, Olsen et al. 2012 [34]

1990 to 2008

-

50 to 84

39

33

0.85

reference


Figures in the table are breast cancer mortality rates per 100,000 women ages 50 to 79 in Denmark and 50 to 84 in Norway. aRate ratios may slightly differ from those of the original publications reported in Table 2 due to rounding and absence of statistical modelling. BC: breast cancer; NR: not reported.

Autier and Boniol BMC Medicine 2012 10:163   doi:10.1186/1741-7015-10-163

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