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Table 5 Overdiagnosis estimates by two different definitions

From: The distribution of ductal carcinoma in situ (DCIS) grade in 4232 women and its impact on overdiagnosis in breast cancer screening

  Low-grade DCIS Intermediate-grade DCIS High-grade DCIS
Population perspective 60 % 56 % 45 %
Individual perspective 61 % 57 % 45 %
Individual perspective by age group    
50–55 58 % 46 % 21 %
55–60 62 % 55 % 29 %
60–65 66 % 64 % 50 %
65–70 49 % 52 % 61 %
70–75 54 % 58 % 66 %
  1. Population perspective: the proportion of all cancers ever diagnosed in women of the screening age and over (50–100 years) that are overdiagnosed. Individual perspective: the proportion of all cancers ever diagnosed in women of the screening age (50–75 years) that are overdiagnosed. Low-grade DCIS: DCIS with a low malignant potential. Intermediate-grade DCIS: DCIS with an intermediate malignant potential. High-grade DCIS: DCIS with a high malignant potential
  2. DCIS ductal carcinoma in situ