Table 3.
Inter-Reader Agreement Between Expert Readers for the Presence of Individual Chest Radiograph Features in Children Investigated for Intrathoracic TB
| All | |||
|---|---|---|---|
| Reader 1 and 2 k, (95% CI) | Reader 1 and 3, k (95% CI) | Reader 2 and 3, k (95% CI) | |
| Number of CR readsa | 259 | 162 | 120 |
| Any abnormality | 0.55 (.41–.68) | 0.55 (.40–.71) | 0.46 (.25–.67) |
| Alveolar opacification | 0.47 (.37–.56) | 0.52 (.39–.66) | 0.47 (.31–.63) |
| Bronchopneumonia | 0.10 (-.01–.21) | 0.15 (.01–.29) | 0.27 (-.07–.61) |
| Collapse | 0.52 (.34–.71) | -0.01 (-.03– .01) | 0.26 (-.05– .56) |
| Perihilar infiltrates | 0.20 (.10–.30) | 0.26 (.07–.44) | 0.37 (.19–.55) |
| Interstitial infiltrates | 0.29 (.11–.46) | -0.01 (-.16–.15) | 0.08 (-.13–.31) |
| Enlarged perihilar lymph nodes | 0.52 (.39–.65) | 0.62 (.47–.78) | 0.64 (.39–.89) |
| Enlarged paratracheal lymph nodes | 0.41 (.24–58) | 0.35 (.10–.61) | 0.79 (.51–1.0) |
| Tracheal deviation/compression | 0.33 (.03–.63) | 0.27 (-.17–.72) | 0.01 (-.03–.01) |
| Bronchial deviation/compression | 0.54 (.38–.70) | 0.37 (.13–.60) | 0.79 (.51–1.0) |
| Miliary infiltrates | 0.38 (.06–.70) | 0.56 (.11–1.0) | 0.00 (.0–.0) |
| Ghon focus | 0.32 (-.03–.67) | 0.66 (.04–1.0) | 0.01 (-.03–.01) |
| Cavities | 0.42 (.21–.62) | 0.34 (-.02– .71) | 0.91 (.72–1.0) |
| Expansile pneumonia | 0.49 (.06–.92) | 1.0 (1.0–1.0) | 0.49 (-.12– 1.0) |
| Pleural effusion | 0.43 (.19–.68) | 0.75 (.53–.96) | 0.79 (.51–1.0) |
Interpretation of Cohen kappa coefficient: ≤0 no agreement, 0.01–0.2 slight agreement, 0.21–0.4 fair agreement, 0.41–0.6 moderate agreement, 0.61–0.8 substantial agreement, 0.81–1.00 almost perfect agreement.
Abbreviations: CI, confidence interval; CR, chest radiograph; k, Cohen kappa coefficient.
Each CR generated 2 single independent CR reads.