Table 4.
Observer 1 criteria identified.
| Sensitivity in % (95% CI) | Specificity in % (95% CI) | PPV in % (95%CI) | NPV in % (95%CI) | Accuracy | |
|---|---|---|---|---|---|
| Indistinct nodal margins | 7 (2–17) | 100 (91–100) | 100 (51–100) | 42 (32–52) | 44 |
| Infiltration into adjacent tissues | 50 (36–64) | 84 (68–94) | 82 (67–92) | 53 (40–65) | 63 |
| Irregular nodal enhancement | 34 (22–48) | 95 (82–99) | 90 (71–97) | 47 (37–60) | 58 |
| Matted nodes | 27 (16–40) | 86 (71–95) | 75 (53–89) | 44 (33–55) | 51 |
| Central necrosis | 63 (49–75) | 78 (62–90) | 81 (67–90) | 58 (44–71) | 69 |
CI: confidence interval; PPV: positive predictive value; NPV: negative predictive value.