Table 2.
Linear Mixed-Effects Model Examining the Effects of Task, Whole-Brain WMI, and Their Interaction on PFC Oxygenation (N = 55)
| Variable | Estimate | t | 95%CI | p-value |
|---|---|---|---|---|
| STW versus DTW | −2.79 | −2.63 | [−4.88, −0.70] | .009 |
| FA | −4.75 | −0.90 | [−15.23, 5.72] | .370 |
| FA * task | 6.46 | 2.12 | [0.46, 12.47] | .035 |
| STW velocity | −0.01 | −0.70 | [−0.01, 0.01] | .485 |
| Age | 0.01 | 0.19 | [−0.02, 0.03] | .846 |
| Sex | −0.05 | −0.44 | [−0.28, 0.18] | .658 |
| GHS | −0.01 | −0.24 | [−0.13, 0.10] | .810 |
| RBANS total | 0.01 | 0.27 | [−0.01, 0.01] | .790 |
Note: DTW = dual-task walk; FA = fractional anisotropy; Global Health Status score potential range from 0 to 10; RBANS = Repeatable Battery for the Assessment of Neuropsychological Status; STW = single-task walk.