Table 2.2: Significance of diagnostic appropriateness of the Kappa value Kappa index Suitability < 0, 20 poor 0, 20 - 0, 40 fair 0, 41 - 0, 60 moderate 0, 61 - 0, 80 good 0, 81 - 1, 00 excellent 10 2.2.7.