Ivy Sign Score (No. of Regions) | Resting CBF (mL/100 g/min), Median (25th Percentile, 75th Percentile) | CVR (%), Median (25th Percentile, 75th Percentile) |
---|---|---|
0 (115) | 33.3 (30.4, 37.2) | 9.1 (1.8, 30.1) |
1 (37) | 32.4 (28.6, 35.0) | 4.3 (−5.7, 21.5) |
2 (40) | 31.6 (28.2, 33.6) | −0.2 (−7.4, 5.3) |
Note:—SPECT indicates single-photon emission CT; CBE, cerebral blood flow; CVR, cerebral vascular reserve.
* As the ivy sign score increased, the median value of the resting CBF decreased slightly (P = .0034). On the other hand, as the ivy sign score increased, the median value of the CVR decreased more obviously (P < .001).