Table 2.
Results of the Independent samples T-test (based on 1000 bootstrap samples, equal variances not assumed).
| Parameter | Mean difference [95% Confidence Interval] | Std. Error | p-value |
|---|---|---|---|
| STM Shape-Only 3 | 0.058 [0.002 0.107] | 0.026 | 0.043 |
| STM Shape-Colour Binding 3 | 0.058 [−0.011 0.134] | 0.035 | 0.112 |
| STM Shape-Colour Binding 2 | 0.106 [0.023 0.192] | 0.043 | 0.021 |
| Addenbrooke's Cognitive Examination (ACE) | 10.762 [5.785 16.196] | 2.605 | 0.003 |
| Trail Making Task B-A | −20.879 [−47.441 7.351] | 13.723 | 0.155 |
| Hopkins Verbal Learning Task recognition | 1.381 [−0.152 3.000] | 0.792 | 0.092 † |
| Hopkins Verbal Learning Task delayed recall | 3.209 [0.569 6.049] | 1.371 | 0.041 |
| Hopkins Verbal Learning Task total recall | 7.498 [3.207 11.679] | 2.092 | 0.007 |
| Total FAS | 18.066 [10.484 25.944] | 3.913 | 0.001 |
| Animal Fluency | 8.201 [5.076 11.378] | 1.616 | 0.001 |
| Digit Symbol | 14.000 [6.807 21.094] | 3.701 | 0.001 |
| Rey Figure Copy | 1.791 [−0.534 4.224] | 1.204 | 0.161 |
| Rey Figure Immediate Recall | 8.749 [2.959 14.251] | 2.940 | 0.016 |
| Rey Figure Delayed Recall | 6.764 [0.919 12.429] | 2.923 | 0.042 |
| Graded Naming Test | 4.070 [1.280 6.999] | 1.427 | 0.012 |
| Normal Appearing White Matter volume (% in ICV) | 0.291 [−0.637 1.274] | 0.478 | 0.549 |
| Cerebrospinal Fluid volume (% in ICV) | −0.984 [−2.395 0.413] | 0.708 | 0.173 |
| Left Hippocampal volume (% in ICV) | 0.035 [0.002 0.067] | 0.017 | 0.055 |
| Right Hippocampal volume (% in ICV) | 0.044 [0.016 0.072] | 0.014 | 0.005 |
| Total Hippocampal volume (% in ICV) | 0.079 [0.026 0.132] | 0.028 | 0.009 |
| Volume of GM in Left Caudate (% in ICV) | 0.009 [−0.022 0.040] | 0.016 | 0.548 |
| Volume of GM in Right Caudate (% in ICV) | 0.028 [−0.0005 0.054] | 0.014 | 0.062 |
| Volume of GM in Left Putamen (% in ICV) | 0.012 [−0.024 0.045] | 0.017 | 0.494 |
| Volume of GM in Right Putamen (% in ICV) | 0.015 [−0.020 0.052] | 0.018 | 0.430 |
| Volume of GM in Left Globus Pallidus (% in ICV) | 0.003 [−0.003 0.008] | 0.003 | 0.382 |
| Volume of GM in Right Globus Pallidus (% in ICV) | 0.005 [−0.002 0.012] | 0.003 | 0.129 |
| Volume of GM in Left Thalamus (% in ICV) | −0.005 [−0.039 0.028] | 0.017 | 0.801 |
| Volume of GM in Right Thalamus (% in ICV) | −0.0008 [−0.034 0.031] | 0.017 | 0.959 |
| Volume of the Parahippocampal Gyrus (% in ICV) | 0.076 [0.020 0.143] | 0.031 | 0.035 |
Note: † p-value without bootstrap.
Legend: VSTM: Visual Short Term Memory, GM: Grey Matter, ICV: Intracranial Volume.