Table 1.

Classification of the strength of agreement according to the Kappa coefficient.

Kappa coefficient	Strength of agreement
Less than 0	Negligible
0.00–0.20	Poor
0.21–0.40	Fair
0.41–0.60	Moderate
0.61–0.80	Good
0.81–1.00	Excellent

Source: Landis and Koch.¹⁷