Table 3.

Proposed scoring system of Landis and Koch (Biometrics 1977 [22]) for rating of the Kappa statistic

Kappa statistic	Strength of agreement
<0.00	Poor
0.00–0.20	Slight
0.21–0.40	Fair
0.41–0.60	Moderate
0.61–0.80	Substantial
0.81–1.00	Almost perfect