Table 1.
Overview of results for all readers at 1.5 and 3T
| 1.5 Tesla MRI | 3 Tesla MRI | |||||||
|---|---|---|---|---|---|---|---|---|
| Reader 1 (RFAV) | Reader 2 (MJL) | Reader 3 (MOJ) | Overall (3 readers) | Reader 1 (RFAV) | Reader 2 (MJL) | Reader 3 (MOJ) | Overall (3 readers) | |
| Sensitivity (%) | 57 (4/7) (33–69) | 43 (3/7) (20–54) | 57 (4/7) (33–69) | 52 (11/21) (39–61) | 57 (4/7) (35–78) | 43 (3/7) (20–54) | 29 (2/7) (10–40) | 43 (9/21) (29–55) |
| Specificity (%) | 83 (5/6) (55–97) | 83 (5/6) (55–97) | 83 (5/6) (55–97) | 83 (15/18) (67–94) | 50 (3/6) (24–75) | 83 (5/6) (55–97) | 83 (5/6) (62–97) | 72 (13/18) (56–86) |
| PPV (%) | 80 (4/5) (46–96) | 75 (3/4) (36–95) | 80 (4/5) (46–96) | 79 (11/14) (58–92) | 57 (4/7) (35–78) | 75 (3/4) (ateria36–95) | 75 (3/4) (24–94) | 64 (9/14) (44–82) |
| NPV (%) | 63 (5/8) (41–73) | 56 (5/9) (38–65) | 63 (5/8) (41–73) | 60 (15/25) (48–67) | 50 (3/6) (37–58) | 56 (5/9) (38–65) | 50 (5/10) (37–58) | 52 (13/25) (40–62) |
| AUC | 0.70 (0.40–1.00) | 0.87 (0.65–1.00) | 0.66 (0.34–0.97) | 0.73 (0.57–0.89) | 0.61 (0.29–0.93) | 0.82 (0.57–1.00) | 0.52 (0.20–0.85) | 0.64 (0.46–0.81) |
| Accuracy (%) | 69 (9/13) (43–82) | 62 (8/13) (37–74) | 69 (9/13) (43–82) | 67 (26/39) (52–76) | 54 (7/13) (30–77) | 62 (8/13) (37–74) | 54 (7/13) (34–66) | 56 (22/39) (42–69) |
| Overstaging (%) | 43 (3/7) | 29 (2/7) | 57 (4/7) | 43 (9/21) | 43 (3/7) | 43 (3/7) | 86 (6/7) | 57 (12/21) |
| Understaging (%) | 17 (1/6) | 17 (1/6) | 0 (0/6) | 11 (2/18) | 33 (2/6) | 17 (1/6) | 0 (0/6) | 17 (3/18) |
Positive outcome measure is pT1-2
PPV positive predictive value, NPV negative predictive value, AUC area under ROC curve