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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

κ

Level of agreement

< 0

Poor

0.00–0.20

Slight

0.21–0.40

Fair

0.41–0.60

Moderate

0.61–0.80

Substantial

0.81–1

Almost perfect