TABLE 2.
Results of analysis of covariance to assess effects of possible confounds age, scanner site, gender and global metrics.
| Source | df1, df2 | F | p | Effect size |
| Grey matter volume | ||||
| Participant group (A) | 1, 43 | 4.87 | 0.033 | 0.10 |
| ROI (B) | 4.22, 181.56 | 3.63 | 0.006 | 0.08 |
| Scanner site (C) | 2, 43 | 0.61 | 0.549 | 0.03 |
| Age (D) | 1, 43 | 1.10 | 0.299 | 0.03 |
| Gender (E) | 1, 43 | 0.30 | 0.587 | 0.01 |
| Global volume (F) | 1, 43 | 0.95 | 0.335 | 0.02 |
| A × B | 4.22, 181.56 | 4.85 | 0.001 | 0.10 |
| A × C | 2, 43 | 0.02 | 0.976 | 0.00 |
| A × E | 1, 43 | 0.00 | 0.963 | 0.00 |
| A × B × C | 8.44, 181.56 | 0.39 | 0.934 | 0.02 |
| A × B × E | 4.22, 181.56 | 0.86 | 0.492 | 0.02 |
| A × C × E | 2, 43 | 0.08 | 0.920 | 0.00 |
| A × B × C × E | 8.44, 181.56 | 0.30 | 0.968 | 0.01 |
| B × C | 8.44, 181.56 | 1.19 | 0.308 | 0.05 |
| B × D | 4.22, 181.56 | 2.14 | 0.074 | 0.05 |
| B × E | 4.22, 181.56 | 0.53 | 0.723 | 0.01 |
| B × F | 4.22, 181.56 | 0.48 | 0.764 | 0.01 |
| B × C × E | 8.44, 181.56 | 2.64 | 0.008 | 0.11 |
| C × E | 2, 43 | 0.77 | 0.471 | 0.03 |
| Cortical thickness | ||||
| Participant group (A) | 1, 43 | 0.00 | 0.962 | 0.00 |
| ROI (B) | 11.00, 473.00 | 1.11 | 0.352 | 0.03 |
| Scanner site (C) | 2, 43 | 0.86 | 0.432 | 0.04 |
| Age (D) | 1, 43 | 0.03 | 0.861 | 0.00 |
| Gender (E) | 1, 43 | 0.20 | 0.658 | 0.01 |
| Global thickness (F) | 1, 43 | 0.51 | 0.478 | 0.01 |
| A × B | 11.00, 473.00 | 1.55 | 0.112 | 0.04 |
| A × C | 2, 43 | 0.66 | 0.522 | 0.03 |
| A × E | 1, 43 | 0.00 | 0.948 | 0.00 |
| A × B × C | 22.00, 473.00 | 0.85 | 0.666 | 0.04 |
| A × B × E | 11.00, 473.00 | 0.61 | 0.823 | 0.01 |
| A × C × E | 2, 43 | 2.94 | 0.064 | 0.12 |
| A × B × C × E | 22.00, 473.00 | 0.68 | 0.862 | 0.03 |
| B × C | 22.00, 473.00 | 0.79 | 0.746 | 0.04 |
| B × D | 11.00, 473.00 | 0.65 | 0.783 | 0.02 |
| B × E | 11.00, 473.00 | 0.54 | 0.875 | 0.01 |
| B × F | 11.00, 473.00 | 0.86 | 0.582 | 0.02 |
| B × C × E | 22.00, 473.00 | 0.50 | 0.975 | 0.02 |
| C × E | 2, 43 | 3.68 | 0.033 | 0.15 |
| Cortical surface area | ||||
| Participant group (A) | 1, 43 | 7.52 | 0.009 | 0.15 |
| ROI (B) | 2.26, 97.28 | 2.72 | 0.064 | 0.06 |
| Scanner site (C) | 2, 43 | 0.34 | 0.712 | 0.02 |
| Age (D) | 1, 43 | 1.79 | 0.188 | 0.04 |
| Gender (E) | 1, 43 | 0.20 | 0.656 | 0.01 |
| Global surface area (F) | 1, 43 | 0.71 | 0.403 | 0.02 |
| A × B | 2.26, 97.28 | 6.62 | 0.001 | 0.13 |
| A × C | 2, 43 | 0.03 | 0.968 | 0.00 |
| A × E | 1, 43 | 0.10 | 0.749 | 0.00 |
| A × B × C | 4.53, 97.28 | 0.10 | 0.989 | 0.01 |
| A × B × E | 2.26, 97.28 | 0.81 | 0.459 | 0.02 |
| A × C × E | 2, 43 | 0.62 | 0.542 | 0.03 |
| A × B × C × E | 4.53, 97.28 | 0.46 | 0.788 | 0.02 |
| B × C | 4.53, 97.28 | 0.71 | 0.601 | 0.03 |
| B × D | 2.26, 97.28 | 2.89 | 0.054 | 0.06 |
| B × E | 2.26, 97.28 | 0.05 | 0.967 | 0.00 |
| B × F | 2.26, 97.28 | 0.61 | 0.565 | 0.01 |
| B × C × E | 4.53, 97.28 | 2.35 | 0.052 | 0.10 |
| C × E | 2, 43 | 0.27 | 0.765 | 0.01 |
Effect size shown is partial eta-squared. Huynh-Feldt correction applied to correct for violation of sphericity. Significance is illustrated by boldface.