Cross table, sensitivity (SE), specificity (SP), likelihood ratio (LR) and diagnostic accuracy
| Erosions | CT+ | CT− | Diagnostic accuracy | Likelihood ratio | Intermodality | |||||
| T1+ | 28 | 7 | SE | 73.68% | 56.9%–86.6% | LR− | 0.28 | Agreement | 87.5% | |
| T1− | 10 | 91 | SP | 92.86% | 85.84%–97.08% | LR+ | 10.32 | Cohen’s k | 0.682 | 0.54–0.82 |
| SWI+ | 31 | 3 | SE | 81.58% | 65.67%–92.26% | LR− | 0.19 | Agreement | 92.6% | |
| SWI− | 7 | 95 | SP | 96.94% | 91.31%–99.36% | LR+ | 26.65 | Cohen’s k | 0.811 | 0.7–0.92 |
| Sclerosis | CT+ | CT− | ||||||||
| T1+ | 16 | 0 | SE | 23.88% | 14.31%–35.86% | LR− | 0.76 | Agreement | 62.5% | |
| T1− | 51 | 69 | SP | 100.0% | 94.79%–100.0% | LR+ | Cohen’s k | 0.241 | 0.13–0.35 | |
| SWI+ | 50 | 5 | SE | 74.63% | 62.51%–84.47% | LR− | 0.27 | Agreement | 84.6% | |
| SWI− | 17 | 64 | SP | 92.75% | 83.89%–97.61% | LR+ | 10.30 | Cohen’s k | 0.69 | 0.57–0.81 |
| Joint space changes | CT+ | CT− | ||||||||
| T1+ | 26 | 7 | SE | 70.27% | 53.02%–84.13% | LR− | 0.32 | Agreement | 86.8% | |
| T1− | 11 | 92 | SP | 92.93% | 85.97%–97.11% | LR+ | 9.94 | Cohen’s k | 0.654 | 0.5–0.8 |
| SWI+ | 28 | 10 | SE | 75.68% | 58.8%–88.23% | LR− | 0.27 | Agreement | 86% | |
| SWI− | 9 | 89 | SP | 89.9% | 82.21%–95.05% | LR+ | 7.49 | Cohen’s k | 0.65 | 0.51–0.79 |
All values were calculated using CT as standard of reference or in comparison with CT (absolute agreement and Cohen’s kappa). Agreement of SWI with CT was significantly higher for sclerosis (p<0.001) and tended to be higher for erosions (p=0.143), while there was no difference for joint space changes (p=1).
Bold text have been used to mark the subsection headings of the table.
SWI, susceptibility-weighted imaging.