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Table 2 Determination of interpretation categories of kappa values, adapted from Landis and Koch [10]

From: Optimization of PET protocol and interrater reliability of 18F-PSMA-11 imaging of prostate cancer

κLevel of agreement
< 0Poor
0.00–0.20Slight
0.21–0.40Fair
0.41–0.60Moderate
0.61–0.80Substantial
0.81–1Almost perfect