Table 3.
Analysis of interreader agreement percent of concordance and kappa of agreement.
| CT features | N (% of concordance) | Kappa (95%CI) | Kappa interpretation |
|---|---|---|---|
| Shape | 767/827 | 0.726 (0.655–0.788) | Substantial |
| Location | 803/827 | 0.828 (0.724–0.906) | Almost perfect |
| Texture | 788/827 | 0.847 (0.794–0.893) | Almost perfect |
| Bubblelike lucency | 787/827 | 0.797 (0.727–0.852) | Almost perfect |
| Margins | 777/827 | 0.851 (0.807–0.888) | Almost perfect |
| Vascular convergence | 758/827 | 0.767 (0.707–0.818) | Almost perfect |
| Air bronchogram | 762/827 | 0.827 (0.781–0.867) | Almost perfect |
| Cavitation | 809/827 | 0.839 (0.761–0.909) | Almost perfect |
| Pleural retraction | 821/827 | 0.984 (0.969–0.995) | Almost perfect |
| Pleural effusion | 797/827 | 0.926 (0.893–0.950) | Almost perfect |
| Spiculate | 782/827 | 0.613 (0.511–0.711) | Substantial |
| Calcifications | 785/827 | 0.626 (0.510–0.714) | Substantial |
| Enhancement degree | 215/360 | 0.748 (0.677–0.816) | Substantial |
| Peripheral emphysema | 801/827 | 0.894 (0.853–0.928) | Almost perfect |
| Peripheral fibrosis | 779/827 | 0.860 (0.891–0.899) | Almost perfect |
| Lymphadenopathy | 794/827 | 0.884 (0.842–0.920) | Almost perfect |
| Thickening pleura | 789/827 | 0.749 (0.673–0.818) | Substantial |
| Heterogeneity | 773/827 | 0.873 (0.828–0.902) | Almost perfect |
| Necrosis | 747/827 | 0.694 (0.623–0.751) | Substantial |
| Metastasis | 793/827 | 0.908 (0.874–0.939) | Almost perfect |