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Table 1 Number of breast cancers, number of women, and incidence rates in screened and non-screened areas, before and after screening started, and during the last three years of observation.

From: Overdiagnosis in organised mammography screening in Denmark. A comparative study

   Screened areas Non-screened areas
   1971-1990 No screening 1991-2003 Screening 2001-3 Screening 1971-1990 1991-2003 2001-3
Breast cancers 35-49 years 2,110 1,684 (4% CIS) 381 (3% CIS) 8,668 7,228 (5% CIS) 1,741 (4% CIS)
  50-69 years 5,846 5,189 (6% CIS) 1,282 (6% CIS) 16,263 17,686 (3% CIS) 4,922 (2% CIS)
  70-79 years 3,258 2,058(3% CIS) 383 (2% CIS) 7,256 6,483 (2% CIS) 1,767 (2% CIS)
Person years 35-49 years 1,759,614 1,317,024 314,322 7,827,731 6,038,527 1,412,069
  50-69 years 2,737,925 1,342,836 326,946 8,223,810 6,191,609 1,565,967
  70-79 years 1,195,296 606,034 117,077 2,743,410 2,100,884 481,608
Per 100,000 35-49 years 120 128 121 111 120 123
  50-69 years 214 386 392 198 286 314
  70-79 years 273 340 327 264 309 367