Table 2.
Concordances and discordances of diffusion-weighted MR studies by level of training
| Level of training | Correct diagnosis | FP results | FN results | Total no. of discrepancies | |
|---|---|---|---|---|---|
| TP | TN | ||||
| R1 | 74 (46.2) | 58 (36.2) | 6 (3.8) | 22 (13.8) | 28 (17.6) |
| R2 | 72 (45) | 61 (38.1) | 3 (1.9) | 24 (15) | 27 (16.9) |
| R3 | 71 (44) | 63 (39) | 1 (0.6) | 25 (15.6) | 26 (16.2) |
| R4 | 77 (48) | 72 (45) | 4 (2.5) | 12 (7.5) | 16 (10) |
Data are number of examinations; numbers in parentheses are percentages
FN false negative; FP false positive; NPV negative predictive value; PPV positive predictive value; TN true negative; TP true positive