Table 3.
Left-right difference in segmented brain volume ratio and cerebral blood flow.
| Left | Right | Difference | P value | |
|---|---|---|---|---|
| Total brain (volume ratio, %) | 38.1 ± 1.7 | 38.0 ± 1.7 | 0.13 ± 0.49 | 0.612 |
| Cortical gray matter (%) | 16.1 ± 1.0 | 16.4 ± 1.0 | -0.29 ± 0.25 | 0.026 |
| Subcortical gray matter (%) | 0.72 ± 0.04 | 0.71 ± 0.04 | 0.01 ± 0.02 | 0.010 |
| Cerebral white matter (%) | 14.4 ± 0.9 | 14.4 ± 1.0 | -0.01 ± 0.20 | 0.869 |
| Frontal cortex (%) | 5.7 ± 0.4 | 5.9 ± 0.4 | -0.24 ± 0.18 | <0.001 |
| Parietal cortex (%) | 4.0 ± 0.3 | 4.0 ± 0.3 | 0.03 ± 0.13 | 0.439 |
| Temporal cortex (%) | 4.1 ± 0.3 | 4.1 ± 0.3 | 0.02 ± 0.13 | 0.625 |
| Occipital cortex (%) | 1.9 ± 0.2 | 2.0 ± 0.2 | -0.07 ± 0.15 | 0.002 |
| Insula cortex (%) | 0.43 ± 0.03 | 0.45 ± 0.03 | -0.02 ± 0.02 | <0.001 |
| Limbic system (%) | 1.3 ± 0.1 | 1.0 ± 0.1 | 0.21 ± 0.07 | <0.001 |
| Hippocampus (%) | 0.23 ± 0.01 | 0.25 ± 0.02 | -0.02 ± 0.01 | <0.001 |
| Basal ganglia (%) | 0.49 ± 0.04 | 0.46 ± 0.04 | 0.03 ± 0.02 | <0.001 |
| Cerebellum (%) | 4.7 ± 0.4 | 4.7 ± 0.4 | 0.07 ± 0.10 | 0.113 |
| Lateral ventricle (%) | 0.84 ± 0.4 | 0.71 ± 0.4 | 0.13 ± 0.15 | <0.001 |
| ICA flow (mL/min) | 342.8 ± 111.1 | 330.7 ± 115.7 | 12.1 ± 98.8 | 0.306 |
| MCA flow (mL/min) | 167.1 ± 54.8 | 185.8 ± 62.3 | -18.8 ± 47.1 | 0.013 |
| ACA-A1 flow (mL/min) | 118.3 ± 52.5 | 100.6 ± 46.7 | 17.1 ± 63.0 | 0.010 |
| ACA-A2 flow (mL/min) | 96.0 ± 41.2 | 86.0 ± 35.8 | 9.95 ± 33.4 | 0.096 |
| PCA-P1 flow (mL/min) | 85.0 ± 35.3 | 91.5 ± 44.4 | -7.87 ± 37.1 | 0.282 |
| PCA-P2 flow (mL/min) | 88.9 ± 39.7 | 96.1 ± 38.5 | -5.31 ± 28.7 | 0.059 |
| Total outflow #1 (mL/min) | 369.5 ± 111.7 | 382.0 ± 131.4 | -12.0 ± 101 | 0.675 |
| Total outflow #2 (mL/min) | 350.0 ± 115.5 | 365.7 ± 116.0 | -11.4 ± 66.1 | 0.218 |
Difference, left minus right. P-value, prevalence ratio for the Wilcoxon rank sum test.