Table 2 Agreement between the radiologists (interobserver variability) for the first and second readings (P value < 0.05)
Observersa | First round K value (95% confidence interval) | % agreement (n/na) | Second round K value (95% confidence interval) | % agreement (n/na) |
|---|---|---|---|---|
Between observer 1,2 | 0.36 (0.31–0.59) | 62.5 (125/200) | 0.59 (0.57–0.60) | 65 (130/200) |
Between observer 1,3 | 0.38 (0.28–0.49) | 71 (142/200) | 0.50 (0.47–0.50) | 75 (150/200) |
Between observer 2,3 | 0.56 (0.47–0.59) | 82.5 (165/200) | 0.57 (0.55–0.60) | 90.5 (181/200) |