Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 2 Level of agreement among observers for the AO/OTA 2007 classification after both review sessions
AO/OTA 2007 | Observers | % agreement | Kappa (95% CI) | Judgement |
|---|---|---|---|---|
First reading | 1 versus 2 | 65.9 | 0.680 (0.546–0.817) | Substantial agreement |
1 versus 3 | 60.3 | 0.561 (0.472–0.662) | Moderate agreement | |
2 versus 3 | 58.6 | 0.546 (0.448–0.644) | Moderate agreement | |
Mean | 61.6 | 0.590 (0.448–0.817) | Moderate agreement | |
Second reading | 1 versus 2 | 56 | 0.519 (0.420–0.617) | Moderate agreement |
1 versus 3 | 65.5 | 0.626 (0.534–0.718) | Substantial agreement | |
2 versus 3 | 52.6 | 0.482 (0.383–0.582) | Moderate agreement | |
Mean | 58 | 0.542 (0.383–0.718) | Moderate agreement |