Statistical analyses of TMT scores
| Main and interaction effects* | ||
|---|---|---|
| Factor | F | p value |
| TMT-B – TMT-A | ||
| NSS × ACC morphology | 9.5 | 0.005 |
| ACC morphology × CSF volume | 9.5 | 0.005 |
| NSS × handedness | 4.5 | 0.044 |
| ACC morphology | 4.7 | 0.040 |
| TMT-B | ||
| ACC morphology × CSF volume | 8.0 | 0.009 |
| NSS × ACC morphology | 7.6 | 0.011 |
| TMT-A | ||
| Age | 15.9 | < 0.001 |
| Education level | 4.7 | 0.040 |
| Handedness × CSF volume | 4.4 | 0.046 |
ACC = anterior cingulate cortex; CSF = cerebrospinal fluid; NSS = neurological soft signs; TMT = Trail Making Test.
↵* Main and interaction effects were assessed using univariate linear models, including NSS, handedness, ACC morphology and sex as qualitative factors and CSF normalized volume, age and years of education as quantitative covariates. Only significant effects are reported.