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 | |