Table 3.
Statistical measures of the performance of 18F-FDG PET and 1H MRS
| Visual Analysis | Parameter (%) | All Cases | Low–Grade | High–Grade |
|---|---|---|---|---|
| 18F-FDG PET | Sensitivity | 80 (30–99) | 100 (20–100) | 67 (13–98) |
| Specificity | 71 (30–95) | 67 (13–98) | 75 (22–99) | |
| PPV | 83 (36–99) | 100 (20–100) | 75 (22–99) | |
| NPV | 67 (24–94) | 67 (13–98) | 67 (13–98) | |
| Accuracy | 75 (43–93) | 80 (30–99) | 71 (30–95) | |
| 1H MRS | Sensitivity | 100 (46–100) | 100 (20–100) | 100 (31–100) |
| Specificity | 71 (30–95) | 33 (2–87) | 100 (40–100) | |
| PPV | 100 (46–100) | 100 (5–100) | 100 (40–100) | |
| NPV | 71 (30–95) | 50 (9–91) | 100 (31–100) | |
| Accuracy | 83 (51–97) | 60 (17–93) | 100 (56–100) |
*
Numbers in parentheses are 95% confidence intervals.