Table 2.
Major imaging-based features selected by Wilk’s λ value of a stepwise forward variable selection method in four imaging-based clusters and healthy subjects (stratum 1)
| Variable | Region | Wilk’s λ value |
Cluster 1 (N = 100) |
Cluster 2 (N = 80) |
Cluster 3 (N = 141) |
Cluster 4 (N = 85) |
P value | Stratum 1 (N = 69) |
|---|---|---|---|---|---|---|---|---|
| βtissueRV | Total | 0.286 |
0.240 (0.041) |
0.245 (0.041) |
0.172 (0.026) |
0.110 (0.020) |
< 0.0001 |
0.264 (0.054) |
| Jacobian | Total | 0.145 |
2.16 (0.259) |
1.67 (0.200) |
1.63 (0.201) |
1.32 (0.147) |
< 0.0001 |
2.11 (0.378) |
| Emph% | Total | 0.116 |
5.8 (0.058) |
2.4 (0.026) |
10.4 (0.073) |
25.0 (0.110) |
< 0.0001 |
0.024 (0.028) |
| fSAD% | Total | 0.093 |
8.7 (0.065) |
7.5 (0.055) |
23.5 (0.086) |
36.8 (0.074) |
< 0.0001 |
0.050 (0.052) |
| βtissueTLC | Total | 0.080 |
0.109 (0.015) |
0.142 (0.019) |
0.103 (0.014) |
0.081 (0.014) |
< 0.0001 |
0.122 (0.03) |
Values expressed as mean (SD). Full names of each variable or region were described in Abbreviations used