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Table 2 Breast-cancer incidence proportion from 1980-1990 to 1995-2005 in France

From: An investigation of the apparent breast cancer epidemic in France: screening and incidence trends in birth cohorts

Age in the cohort Incidence proportion of breast cancer diagnosis for 11 year periods Incidence proportion attributable to change in risk factor exposure from 1980-1990 to 1995-2005 Relative change in adjusted incidence proportion attributable to overdiagnosis
  Cases per 1000 Cases per 1000 Adjusted relative increase
  (1) (2) (3) (4) (5) {(2)-(1)-(3)-(4)-(5)}/(1)
  1980 - 1990 1995 - 2005 HRT Alcohol Obesity  
50-64 20.4 36.8 .82 - .40 .48 76.0%
95% CL:66.7; 85.0
65-79 24.3 30.9 .89 - .25 .33 23.0 %
95% CL: 15.2%; 30.9%
  1. Comparison of 11 year follow-up of age matched cohorts 15 years apart