Table 3.
Results of between-group comparisons for outcome measures
| Outcome Measure | TDC | TBI | MD | t | df | 95% CI | Hedges’s g | |||
|---|---|---|---|---|---|---|---|---|---|---|
| n | M (SD) | n | M (SD) | LL | UL | |||||
| FA | ||||||||||
| CCa | 19 | .482 (.019) | 21 | .455 (.039) | .027** | 2.821 | 30.9 | .001 | .047 | .848 |
| FX | 17 | .351 (.018) | 20 | .325 (.024) | .026** | 3.747 | 35.0 | .012 | .040 | 1.210 |
| Right CBa | 19 | .396 (.026) | 21 | .378 (.045) | .018 | 1.563 | 33.8 | −.005 | .041 | .473 |
| Left CBa | 19 | .425 (.030) | 21 | .407 (.048) | .018 | 1.427 | 35.7 | −.008 | .043 | .433 |
| Right PPa | 19 | .342 (.016) | 21 | .326 (.039) | .016 | 1.737 | 27.7 | −.003 | .035 | .520 |
| Left PP | 19 | .329 (.024) | 21 | .319 (.036) | .010 | 1.024 | 38.0 | −.010 | .030 | .318 |
| Right UF | 18 | .379 (.020) | 20 | .368 (.033) | .010 | 1.153 | 36.0 | −.008 | .029 | .367 |
| LeftUF | 18 | .394 (.028) | 16 | .381 (.037) | .013 | 1.129 | 32.0 | −.010 | .036 | .378 |
| LDFR rawa | 19 | 12.00 (2.29) | 21 | 10.19 (3.75) | 1.809 | 1.862 | 34.9 | −.164 | 3.783 | .564 |
| LDFR z-score | 19 | 0.42 (0.99) | 21 | −0.25 (1.41) | .671 | 1.729 | 38.0 | −.115 | 1.457 | .536 |
TDC = typically developing children. TBI = traumatic brain injury. FA = fractional anisotropy. CC = corpus callosum. FX = fornix. CB = cingulum bundle. PP = perforant pathways. UF = uncinate fasciculus. LDFR = total score on the long-delay free recall trial of the California Verbal Learning Test – Children’s version (Delis et al. 1994). Hedges’s g ≥ .20, .50, and .80 are considered small, medium, and large effect sizes, respectively (Hedges 1981)
**
p < .01
a
Welch’s two-sample t-test (Welch 1947) was used to compare means with unequal variances