Table 1.
Participant characteristics (n = 30).
| Demographics | Baseline |
|---|---|
| Age, mean (SD) | 69.2 (4.3) |
| Sex, % female (n) | 66.7 (20) |
| Years of education, mean (SD) | 14 (2.7) |
| Mood (DASS score), mean (SD) | 9.1 (4.7) |
| MoCA score, mean (SD) | 26.4 (1.8) |
| Cardiorespiratory fitness (VO2peak) | 23 (5.6) |
| Sleep medication use, % positive (n) | 50 (15) |
| Total PSQI score, mean (SD), range | 9.7 (2.6), 6–15 |
| Sleep efficiency (%), mean (SD) | 84.9 (5.3) |
| Total sleep time (hours), mean (SD) | 6.5 (0.8) |
| Sleep onset latency (minutes), mean (SD) | 19.5 (5.6) |
| Light sleep (%), mean (SD) | 63.2 (8.6) |
| Deep sleep (%), mean (SD) | 14.3 (4.3) |
| REM sleep (%), mean (SD) | 22.5 (5.7) |
DASS, Depression, Anxiety and Stress Scale; PSQI, Pittsburgh Sleep Quality Index; MoCA, Montreal Cognitive Assessment; REM, rapid eye movement. All sleep variables taken from baseline WatchPAT measurements, except for PSQI score which is self-reported. VO2peak refers to peak aerobic capacity, averaged across two baseline fitness tests.