TABLE 4.
Regressions Between Behavioral Summary Measure of Fluid Processing and Occipital Metabolite Ratios.
| Full Sample | Young Adult Group | Older Adult Group | |||||||
|---|---|---|---|---|---|---|---|---|---|
| df | T |
p (one tailed) |
df | T |
p (two tailed) |
df | T |
p (two tailed) |
|
| GABA+/Cr | 31 | 1.84 | 0.07 | 14 | −2.45 | <0.05 | 15 | 1.47 | 0.16 |
| Myo/Cr | 34 | 2.70 | 0.01 | 16 | 0.69 | 0.85 | 16 | 1.28 | 0.22 |
| Cho/Cr | 34 | −0.16 | n.s.* | 16 | −1.52 | 0.15 | 16 | 0.86 | 0.40 |
| NAA/Cr | 34 | 1.87 | 0.07 | 16 | −0.08 | 0.94 | 16 | −0.04 | 0.97 |
| Glx/Cr | 34 | 3.36 | <0.01 | 16 | 0.27 | 0.79 | 16 | 3.34 | <0.01 |
Cho, choline; Cr, creatine; GABA, gamma-aminobutyric acid; Glx, glutamate and glutamine; Myo, myoinositol; NAA, N-acetylaspartic acid.
*
Nonsignificant. Relationship between task performance and metabolite ratios was opposite to that predicted, and so exact significance values were not calculated.