Table 1.

Interpretation of intraclass correlation coefficients (ICC)

ICC	Agreement
1.0	Perfect agreement
0.99 to 0.81	Almost perfect agreement
0.80 to 0.61	Substantial agreement
0.60 to 0.41	Moderate agreement
0.40 to 0.21	Fair agreement
0.20 to 0.01	Slight agreement
0.0 to −0.1	Poor agreement