Frequencies observed

 

T =1

T = 0

Total

V= 1

 

 

 

D = 1

231

27

258

D = 0

32

54

86

V= 0

166

140

306

Total

429

221

650

Estimations of the weighted kappa coefficient

c

95% CI

0.1

0.594

(0.489 , 0.699)

0.2

0.584

(0.482 , 0.686)

0.3

0.575

(0.475 , 0.676)

0.4

0.567

(0.467 , 0.667)

0.5

0.558

(0.457, 0.659)

0.6

0.550

(0.447 , 0.652)

0.7

0.542

(1.437, 0.647)

0.8

0.534

(0.426 , 0642)

0.9

0.526

(0.412 , 0.637)

Table 8: Data from the study of Drum and Christacopoulos and estimations of the weighted kappa coefficient.