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Table 1 Estimated effect of early breast cancer (BC) detection, in the 40-80 year age interval, with different screening strategies.

From: Effectiveness of early detection on breast cancer mortality reduction in Catalonia (Spain)

Periodicity Age interval for screening exams Effect of early detection
   MR (%) YLG
per woman screened
YLG
per BC detected
Annual 40-74 29.8 0.222 1.874
Biennial 40-74 22.9 0.165 1.387
Annual 45-74 28.9 0.205 1.727
Biennial 45-74 22.3 0.152 1.283
Annual 50-74 27.4 0.180 1.515
Biennial 50-74 21.3 0.134 1.127
Annual 40-69 27.6 0.219 1.845
Biennial 40-69 21.2 0.162 1.369
Annual 45-69 26.7 0.201 1.697
Biennial 45-69 21.2 0.151 1.272
Annual 50-69 25.3 0.176 1.485
Biennial 50-69 19.6 0.132 1.109
  1. Relative BC mortality reduction (MR) and Years of Life Gained (YLG). Catalonia, cohorts born in 1955-59.