Table 2.
Mean FA values for ASD and TD groups. For each of the five target tracts, the mean fractional anisotropy (FA) is shown for each group (ASD = autism spectrum disorder; TD = typically developing; F = between-group F-test value with QA rating covaried out; p = p-value). Bilateral tracts have been collapsed due to no main effect of laterality.
| Tract | Fractional anisotropy |
F | p | |
|---|---|---|---|---|
| ASD | TD | |||
| SPLEN | .658 (±.04) | .678 (±.03) | 5.358 | 0.026a |
| CS | .413 (±.03) | .431 (±.03) | 3.663 | 0.063 |
| SCR | .483 (±.03) | .479 (±.05) | 0.28 | 0.599 |
| PLIC | .567 (±.02) | .572 (±.01) | 0.042 | 0.839 |
| ILF | .434 (±.04) | .467 (±.04) | 6.138 | 0.018a |
a
Statistically significant between-group difference in tract-specific FA.