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Table 1 Grade distribution by detection mode and sample size compared to previous studies on DCIS grade distribution

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

  Screen detected Symptomatic Not specified
  DCIS grade 1 DCIS grade 2 DCIS grade 3   DCIS grade 1 DCIS grade 2 DCIS grade 3   DCIS grade 1 DCIS grade 2 DCIS grade 3  
  % % % N % % % N % % % N
This study 16 32 52 1430 19 28 54 263     
Evans 2001 [6] 13 18 69 222 16 23 61 151 - - - -
Kessar 2002 [15] 23 23 54 98 19 19 62 52 - - - -
Meijnen 2005 [16] 22 31 47 87 26 24 49 293 - - - -
de Roos 2007 [14] 7 44 53 54 30 45 25 20 - - - -
Sorum 2010 [18] - - - - - - - - 23 23 53 2403
Bluekens 2012 [19] 15 32 54 853 - - - - - - - -
Weigel 2015 [33] 18 39 42 898 - - - - - - - -
  1. DCIS ductal carcinoma in situ