Table 2 Proportion of grades among diff erent studies.
From: Breast cancer prognostic classification in the molecular era: the role of histological grade
Study | Number of cases | Grade 1 | Grade 2 | Grade 3 |
|---|---|---|---|---|
Elston, 1984 [77] | 625 | 17% | 37% | 46% |
Davis et al., 1986 [78] | 1,537 | 22% | 49% | 29% |
Hopton et al., 1989 [59] | 874 | 29% | 46% | 25% |
Le Doussal et al., 1989 [79] | 1,262 | 11% | 45% | 46% |
Balslev et al., 1994 [80] | 9,149 | 32% | 49% | 19% |
Saimura et al., 1999 [5] | 741 | 19% | 37% | 44% |
Reed et al., 2000 [32] | 613 | 25% | 41% | 35% |
Simpson et al., 2000 [7] | 368 | 22% | 45% | 33% |
Lundin et al., 2001 [6] | 1,554 | 26% | 47% | 27% |
Frkovic-Grazio and Bracko, 2002 [9] | 270 | 38% | 38% | 24% |
Warwick et al., 2004 [10] | 1,988 | 23% | 37% | 40% |
Williams et al., 2006 [26] | 1,058 | 20% | 46% | 34% |
Rakha et al., 2008 [11] | 2,219 | 18% | 36% | 46% |
Thomas et al., 2009 [81] | 1,650 | 26% | 45% | 29% |
Blamey et al., 2009 [12] | 16,944 | 29% | 41% | 30% |