Table 2.
Diagnostic accuracy of readers by group* and by attendance or non-attendance at previous in person FAST MRI interpretation-training
| Category | Measure | ||||
|---|---|---|---|---|---|
| Concordance (Accuracy) | True positive rate (Sensitivity) | True negative rate (Specificity) | Kappa (95% CI) | Diagnostic odds ratio (95% CI) | |
| All readers | 9800/10746 (91%) | 1994/2408 (83%) | 7806/8338 (94%) | 0.75 (0.74–0.77) | 70.67 (61.59–81.09) |
| Reader group* | |||||
| Group 1* | 5065/5498 (92%) | 1034/1232 (84%) | 4031/4266 (94%) | 0.77 (0.76–0.80) | 89.58 (73.26–109.52) |
| Group 2* | 4735/5248 (90%) | 960/1176 (82%) | 3775/4072 (93%) | 0.73 (0.70–0.75) | 56.49 (46.76–68.25) |
| Attendance at previous in person FAST MRI interpretation training | |||||
| Attended | 4123/4500 (92%) | 876/1008 (87%) | 3247/3492 (93%) | 0.77 (0.75–0.79) | 87.95 (70.27–110.08) |
| Not attended | 5677/6246 (91%) | 1118/1400 (80%) | 4559/4846 (94%) | 0.74 (0.72–0.76) | 62.98 (52.77–75.16) |
| Reader group* and attendance at previous in person FAST MRI interpretation training | |||||
| Group 1* Attended | 1613/1750 (92%) | 533/616 (87%) | 2002/2134 (94%) | 0.78 (0.75–0.81) | 97.40 (72.83–130.25) |
| Group 1* Not attended | 2530/2748 (92%) | 501/616 (81%) | 2029/2132 (95%) | 0.77 (0.74–0.80) | 85.82 (64.65–113.93) |
| Group 2* Attended | 1588/1750 (91%) | 343/392 (88%) | 1245/1358 (92%) | 0.75 (0.71–0.78) | 77.12 (54.03–110.09) |
| Group 2* Not attended | 3147/3498 (90%) | 617/784 (79%) | 2530/2714 (93%) | 0.71 (0.69–0.74) | 50.80 (40.48–63.76) |
* Reader group: group 1 = experience of fpMRI interpretation in their usual clinical practice, group 2 = no previous experience of breast MRI interpretation in their clinical practice