Clinical Study
No Excess Mortality in Patients Aged 50 Years and Older Who Received Treatment for Ductal Carcinoma In Situ of the Breast
Table 1
Characteristics of the population with ductal carcinoma in situ (DCIS) 1997–2005.
| | Variable | | Age (years) | |
| | | <50 | 50–64* | 65–75* | >75 | Total | | | N (%) | N (%) | N (%) | N (%) | N (%) |
| | Period | 1997–1999 | 546 (33.2) | 1196 (29.1) | 529 (27.0) | 232 (32.3) | 2503 (29.7) | | 2000–2002 | 511 (31.1) | 1327 (32.5) | 723 (36.9) | 245 (34.1) | 2806 (33.3) | | 2003–2005 | 587 (35.7) | 1574 (38.4) | 709 (36.1) | 242 (33.6) | 3112 (37.0) | | Grade | I | 220 (13.4) | 482 (11.8) | 278 (14.2) | 120 (16.7) | 1100 (13.1) | | II | 391 (23.8) | 987 (24.1) | 507 (25.8) | 146 (20.3) | 2031 (24.1) | | III | 644 (39.2) | 1726 (42.1) | 712 (36.3) | 177 (24.6) | 3259 (38.7) | | Unknown | 389 (23.6) | 902 (22.0) | 464 (23.7) | 276 (38.4) | 2031 (24.1) |
| | Total | | 1644 | 4097 | 1961 | 719 | 8421 |
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*Invited for mass screening program in the Netherlands.
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