Research Article
Discrimination between Alzheimer's Disease and Mild Cognitive Impairment Using SOM and PSO-SVM
Table 2
Statistical analysis of features.
| Features | Mean volume ± SD | Normal | MCI | AD | value (NC versus MCI) | value (NC versus AD) |
| Volume | | | | | | | 862.4 ± 42.7 | 824.6 ± 57.8 | 789.7 ± 84.3 | 0.016 | 0.007 | | 637.6 ± 45.8 | 601.8 ± 21.2 | 558.1 ± 63.4 | 0.021 | 0.019 | | 863.1 ± 112.9 | 909.7 ± 128.5 | 971.8 ± 132.5 | 0.038 | 0.017 | Shape | | | | | | Area | 1792.4 ± 278.5 | 1903.5 ± 426.6 | 2361.1 ± 802.3 | 0.029 | 0.024 | Area (PR) | 673.5 ± 121.5 | 874.9 ± 132.5 | 911.4 ± 183.2 | 0.024 | 0.018 | Area (PL) | 647.1 ± 137.2 | 872.5 ± 142.5 | 910.9 ± 183.5 | 0.031 | 0.011 | Area (FR) | 151.9 ± 117.6 | 231.5 ± 162.4 | 262.4 ± 167.8 | 0.020 | 0.009 | Area (FL) | 162.7 ± 91.0 | 258.2 ± 144.3 | 278.5 ± 189.2 | 0.022 | 0.010 | Perimeter | 226.7 ± 23.1 | 276.9 ± 20.2 | 289.8 ± 27.6 | 0.029 | 0.019 | Circularity | 45.6 ± 4.9 | 39.8 ± 3.6 | 38.2 ± 2.7 | 0.039 | 0.021 | Elongation | 1.1 ± 0.4 | 1.4 ± 0.6 | 1.3 ± 0.2 | 0.016 | 0.009 | Rectangularity | 0.5 ± 0.2 | 0.6 ± 0.4 | 0.6 ± 0.1 | 0.028 | 0.016 | | 37.3 ± 2.1 | 38.4 ± 3.7 | 40.6 ± 4.2 | 0.031 | 0.037 | | 36.1 ± 1.8 | 39.2 ± 3.1 | 43.1 ± 6.1 | 0.034 | 0.028 | | 38.6 ± 4.3 | 41.4 ± 2.9 | 42.9 ± 4.6 | 0.042 | 0.030 | | 34.7 ± 2.9 | 39.7 ± 1.4 | 42.8 ± 4.1 | 0.022 | 0.028 | | 72.8 ± 4.3 | 81.7 ± 8.4 | 83.8 ± 8.4 | 0.009 | 0.011 | | 72.5 ± 4.9 | 78.2 ± 3.1 | 81.6 ± 8.2 | 0.011 | 0.007 | Min thickness | 27.4 ± 3.8 | 29.0 ± 2.6 | 30.1 ± 3.4 | 0.020 | 0.009 | Mean Sig. | 25.6 ± 3.1 | 27.9 ± 2.7 | 29.8 ± 3.1 | 0.032 | 0.013 |
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