R 2 | R 3 | R 4 | R 5 | R 6 | R 7 | R 8 | R 9 | ||
---|---|---|---|---|---|---|---|---|---|
R 1 | Kappa | 0.267 | 0.387 | 0.450 | 0.409 | 0.357 | 0.453 | 0.376 | 0.652 |
Agreement | 65.73 | 84.37 | 78.82 | 78.75 | 69.10 | 83.33 | 72.73 | 89.93 | |
R 2 | Kappa | 0.146 | 0.330 | 0.326 | 0.318 | 0.244 | 0.338 | 0.250 | |
Agreement | 58.68 | 67.01 | 66.66 | 65.97 | 63.19 | 66.66 | 63.54 | ||
R 3 | Kappa | 0.313 | 0.307 | 0.164 | 0.434 | 0.225 | 0.491 | ||
Agreement | 75.52 | 77.51 | 60.00 | 85.52 | 67.36 | 87.93 | |||
R 4 | Kappa | 0.405 | 0.416 | 0.420 | 0415 | 0.507 | |||
Agreement | 75.09 | 71.38 | 75.59 | 72.92 | 81.38 | ||||
R 5 | Kappa | 0.355 | 0.455 | 0.381 | 0.527 | ||||
Agreement | 68.51 | 79.93 | 71.78 | 83.39 | |||||
R 6 | Kappa | 0.300 | 0.417 | 0.348 | |||||
Agreement | 66.21 | 71.18 | 68.62 | ||||||
R 7 | Kappa | 0.381 | 0.564 | ||||||
Agreement | 72.92 | 87.24 | |||||||
R 8 | Kappa | 0.382 | |||||||
Agreement | 73.26 |
The inter-reader kappa coefficients are shown in the upper part of the cells and the degree of agreement (in %) among readers is shown in the lower part of the cell, for each comparison between two of the readers. Mean kappa value was 0.375 (range: 0.146–0.652) and mean agreement was 73.66% (range: 58.7–90%).
R, reader; SIJ, sacroiliac joint; SpA, spondyloarthritis.