Table 3.

Interpretation of Cohen’s kappa values.

Value of kappa	Level of agreement	% of data that are reliable
0–0.20	None	0–4
0.21–0.39	Minimal	4–15
0.40–0.59	Weak	15–35
0.80–0.90	Strong	64–81
Above 0.90	Almost perfect	82–100