Table 1.
Sample Characteristics
| Total Sample | Low Perceived Fatigue | High Perceived Fatigue | |
|---|---|---|---|
| Participants, n | 314 | 160 | 154 |
| Women, n (%) | 176 (56) | 86 (54) | 89 (58) |
| Mean (SD) | Mean (SD) | Mean (SD) | |
| Age, y | 76.8 (±6.67) | 76.20 (±6.64) | 77.41 (±6.66) |
| Education, y | 14.42 (±3.00) | 14.57 (±2.85) | 14.27 (±3.14) |
| BFI | 1.5 (±1.5) | 0.39 (±0.34) | 2.5 (±1.43) |
| Disease Comorbidity Index | 1.62 (±1.08) | 1.46 (±1.04) | 1.78 (±1.10) |
| RBANS (total score) | 91.38 (±11.74) | 92.29 (±11.57) | 90.44 (±11.86) |
| Gait velocity NW, cm/s | 79.82 (±17.28) | 83.35 (±17.12) | 76.46 (±16.80) |
| Gait velocity WWT, cm/s | 64.96 (±18.63) | 68.12 (±18.31) | 61.93 (±18.48) |
| Alpha: rate of letter generation per minute | 33.6 (±12) | 33.6 (±12.6) | 32.4 (±10.8) |
| WWT: rate of letter generation per minute | 33.6 (±15) | 34.2 (±15.6) | 31.2 (±12) |
| Alpha: rate of errors generation per minute | 3.83 (±5.5) | 4.09 (±6.80) | 3.57 (±3.54) |
| WWT: rate of error generation per minute | 6.94 (±7.39) | 7.47 (±8.93) | 6.40 (±5.39) |
| NW: HbO2 levels | 0.11 (±1.25) | 0.11 (±1.35) | 0.12 (±1.14) |
| Alpha: HbO2 levels | 0.69 (±0.98) | 0.73 (±1.05) | 0.63 (±.90) |
| WWT: HbO2 levels | 0.73 (±1.41) | 0.79 (±1.27) | 0.63 (±1.50) |
Note: BFI = Brief Fatigue Inventory; NW = normal-walk; RBANS = Repeatable Battery for the Assessment of Neuropsychological Status; WWT = walk-while-talk.