Table 1.
Intra-rater reliability of scoring of Etarfolatide SPECT/CT knee images.
| Knee Location | Kappa Statistic |
95% CI | Agreement* | |
|---|---|---|---|---|
| Joint (Capsule) | tibiofemoral | 0.78 | 0.60 – 0.96 | Substantial |
| patellofemoral | 0.64 | 0.25 – 1.00 | Substantial | |
| Synovial | 0.68 | 0.41 – 0.96 | Substantial | |
| Subchondral Bone | 0.90 | 0.72 – 1.00 | Almost perfect | |
CI = confidence interval
*
Magnitude guidelines reflecting the strength of agreement have been described by Landis and Koch: a value <0 indicates no agreement; a value between 0–0.2 slight agreement; 0.21–0.4 fair agreement; 0.41–0.6 moderate agreement; 0.61–0.8 substantial agreement; and 0.81–1.00 almost perfect agreement [47].