Table 1 Inter-observer and intra-observer agreement of breast cancer histological grade.
From: Breast cancer prognostic classification in the molecular era: the role of histological grade
Study | Number of cases | Number of readers | Grade | Inter-observer |
|---|---|---|---|---|
[32] | 613 | 2 | NGS | Kappa 0.69 |
[8] | 52 | 2 | NGS | Kappa 0.54 |
[55] | 425 | 2 | NGS | Complete agreement 76% |
[50] | 75 | 6 | NGS | Kappa 0.43 to 0.74 |
[51] | 12 | 600 | NGS | Kappa 0.45 to 0.53 (figures after application of guidelines) |
[52] | Â | 3 | NGS | Complete agreement 72.3%; kappa 0.57 |
[53] | 24 | 21 | NGS | Complete agreement 69%; kappa 0.53 |
[54] | 50 | 5 | NGS | Mean polychoric correlation 0.8 |
[56] | 35 | 13 | NGS | Kappa 0.5 to 0.7 |
[57] | 93 | 7 | NGS | Kappa 0.54 |
[58] | 40 | 3 | NGS | Kappa 0.68 to 0.83 |
[59] | 874 | 2 | WHO criteria | Complete agreement 78.1%; kappa 0.66 |
[61] | 50 | 5 | NGS | Complete agreement 83.3%; kappa 0.73 |