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Table 4 Kappa comparison according to the estimation method

From: Concordance between the TIRADS ultrasound criteria and the BETHESDA cytology criteria on the nontoxic thyroid nodule

Kappa

Observed Agreement

Expected agreement

Kappa

Standard error

IC 95%

Z

Value p

Global

65.56%

25.27%

0.5391

0.0425

0.46–0.62

12.68

<0.001

Weighted (linear weights)

87.22%

58.76%

0.6901

0.0528

0.59–0.79

13.07

<0.001

Estimated (quadratic weights

94.63%

72.86%

0.8021

0.0731

0.66–0.94

10.97

<0.001