Table 3.
Results of voxelwise modulated white matter density (WMD), partial volume corrected cerebral blood flow (CBF-PV-Corr), and non-partial volume corrected cerebral blood flow (CBF-NonPV-Corr) comparisons between controls and fighters are shown. The results were thresholded at cluster defining threshold (CDT) of p < 0.001 uncorrected. A family wise error rate at corrected p < 0.05 was applied and the clusters surviving the threshold for each group are tabulated. The extent of the cluster, mean ± SD for the compared group in the significant cluster and the effect sizes are tabulated. Refer Fig. 3, Fig. 4, Fig. 5 for the location of the clusters.
| Cluster | Mean ± standard deviation (controls) | Mean ± standard deviation (fighters) | Number of voxels in the cluster | Effect size |
|---|---|---|---|---|
| Modulated white matter density (a.u.) | ||||
| Cluster 1 | 0.51 ± 0.05 | 0.49 ± 0.05 | 3534 | 0.89 ± 0.11 |
| CBF-PV-Corr (ml/100 g/min) | ||||
| Cluster 1 | 65.45 ± 22.24 | 46.9 ± 14.93 | 194 | 0.89 ± 0.11 |
| CBF-NonPV-Corr (ml/100 g/min) | ||||
| Cluster 1 | 35.22 ± 12.18 | 25.91 ± 7.99 | 263 | 0.91 ± 0.1 |
| Cluster 2 | 19.46 ± 12.56 | 29.52 ± 13.03 | 321 | 0.84 ± 0.06 |