Table 3 Analysis of inter-reader agreement showing the percent of concordance and kappa of agreement
CT features | Number (% of concordance)a | kappa (95% CIs)b |
|---|---|---|
Cranial-caudal location | 199/199 (100) | 1 (1, 1) |
Central-peripheral location | 136/199 (68.3) | 0.66 (0.50, 0.80) |
Margin | 174/199 (87.4) | 0.80 (0.72, 0.87) |
Density | 192/199 (96.5) | 0.83 (0.72, 0.95) |
Air bronchogram | 182/199 (91.5) | 0.71 (0.58, 0.84) |
Cavitation | 188/199 (94.5) | 0.80 (0.69, 0.91) |
Pleural tags | 180/199 (90.5) | 0.80 (0.71, 0.88) |
Pleural abutment | 166/199 (83.4) | 0.66 (0.55, 0.77) |
Background emphysema | 198/199 (99.5) | 0.98 (0.94, 1.00) |