rCBVmax and rCBVT, thresholds with respective sensitivities, specificities, and p values
| rCBVmax | rCBVT | ||||
|---|---|---|---|---|---|
| High grade if metric is | ≥1.75 | ≥2.15 | SD ≥1.7 | SD25 ≥1.24 | SD50 ≥1.35 |
| Sensitivity (%) | 98.4 | 95.1 | 95.1 | 95.1 | 95.1 |
| Specificity (%) | 67.7 | 80.7 | 100 | 96.8 | 96.8 |
| P value (vs rCBVmax ≥ 1.75) | <.001 | <.001 | <.001 | ||
| P value (vs rCBVmax ≥ 2.15) | .002 | .004 | .004 | ||
Note:—rCBV indicates relative cerebral blood volume; SD50, SD of the top 50%; SD25, SD of the top 25%.