Table 1.
Descriptive Statistics of Demographic Information, WMI, PFC HbO2 Levels and Gait Velocity (N = 55)
| Total Sample | Low WMI (n = 27) | Med-High WMI (n = 28) | |
|---|---|---|---|
| Age (range 65–88 years) | 74.76 (±4.97) | 75.67 (±5.83) | 73.89 (±3.88) |
| Gender (%female) | 49.1 | 44.4 | 53.6 |
| Education | 15.73 (±3.82) | 13.65 (±3.56) | 16.58 (±3.69) |
| Global health status score | 1.44 (±1.07) | 1.48 (±1.16) | 1.39 (±0.99) |
| RBANS total | 91.89 (±11.06) | 91.33 (±11.09) | 92.43 (±11.21) |
| Gait velocity—STW (cm/s) | 69.79 (±15.47) | 68.02 (±11.67) | 71.50 (±18.48) |
| Gait velocity—DTW (cm/s) | 60.47 (±12.62) | 60.06 (±11.76) | 60.86 (±13.62) |
| HbO2—STW (μM units) | 0.39 (±0.97) | 0.34 (±1.11) | 0.44 (± 0.81) |
| HbO2—DTW (μM units) | 0.90 (±1.54) | 1.09 (±1.61) | 0.71 (±1.45) |
| Whole-brain FA | 0.34 (±0.02) | 0.33 (±0.01) | 0.36 (±0.01) |
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.