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Table 1 Mammography screening program in the Copenhagen (1991–2001) and Funen (1993–2001) regions, Denmark

From: Mammographic density in birth cohorts of Danish women: a longitudinal study

Copenhagen      
Screening period, Year 1991-93 1993-95 1995-97 1997-99 1999-2001
Target population (TP), N (%) 43092 41159 40037 40304 40865
Coverage by age (years), N (%) 29991 (69.6) 25920 (63.0) 24981 (62.4) 25269 (62.7) 24910 (61.0)
50-54 5779 (58.8) 5737 (54.7) 6668 (57.3) 7200 (52.7) 6918 (50.5)
55-59 6967 (72.8) 6279 (67.9) 6127 (66.4) 6699 (70.2) 7215 (67.1)
60-64 7377 (69.2) 5995 (61.4) 5600 (63.2) 5299 (63.9) 5289 (64.2)
65-711 9868 (75.7) 7909 (67.8) 6586 (63.9) 6071 (68.8) 5488 (67.3)
Data on mammographic density, N (%)      
Yes 29991 (98.8) 25920 (99.4) 24981 (99.4) 25269 (99.4) 24910 (99.4)
No2 363 (1.2) 163 (0.6) 157 (0.6) 149 (0.6) 145 (0.6)
Mammographic density, N (%)      
- Fatty 15814 (52.7) 13093 (50.2) 11668 (46.7) 10669 (42.2) 8983 (36.1)
- Mixed/dense 14177 (47.3) 12827 (49.2) 13313 (53.3) 14600 (57.8) 15927 (63.9)
Funen      
Screening period, Year 1993-95 1996-97 1998-99 2000-01  
Target population (TP), N (%) 49666 51985 54198 55905  
Coverage by age (years), N (%) 41381 (83.3) 43483 (83.7) 44272 (82.0) 46007 (82.3)  
50-54 12755 (86.4) 15046 (89.5) 15052 (84.8) 14755 (85.3)  
55-59 10813 (87.4) 10869 (84.5) 11554 (83.6) 13033 (83.7)  
60-64 9370 (81.9) 9370 (81.0) 9682 (81.3) 9941 (81.3)  
65-69 8416 (75.7) 8198 (75.5) 7984 (74.5) 8278 (76.7)  
Data on mammographic density, N (%)      
Yes 40253 (97.3) 42767 (98.4) 43564 (98.4) 45275 (98.4)  
No2 1128 (2.7) 716 (1.6) 708 (1.6) 732 (1.6)  
Mammographic density, N (%)      
Fatty 16650 (41.4) 18031 (42.2) 15733 (36.1) 13452 (29.7)  
Mixed/dense 23603 (58.6) 24736 (57.8) 27831 (63.9) 31823 (70.3)  
  1. 1One woman was aged 72 years at screening in the screening period 1993–95 in Copenhagen. 2Women with a positive mammography screening and subsequent histopathology verified ductal carcinoma in situ (DCIS) or invasive breast cancer.