Table 5.

Concordance and percent agreement between two pathologists

ER-αKi-67
Between Individual Coresn = 288n = 267
    Cohen's κ (95% CI)0.79 (0.74-0.83)0.52 (0.45-0.59)
    Percent agreement*192 (73%)141 (53%)
Between Maximum Stain of Three Coresn = 101n = 96
    Cohen's κ (95% CI)0.73 (0.65-0.82)0.55 (0.44-0.66)
    Percent agreement63 (66%)50 (52%)
Between dichotomized valuen = 96n = 96
    κ (95% CI)0.65 (0.50-0.81)0.67 (0.53-0.82)
    Percent agreement81 (84%)81 (84%)
  • Abbreviation: 95% CI, 95%, confidence interval.

  • * Number of cores that were scored the same by the two pathologists.

  • The maximum stain of the three cores was dichotomized (positive if staining in >10% of cells).