Table 1

Interpretation of intraclass correlation coefficients (ICC)

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