Table 3.
Summary of demographic characteristics and wearable sensor data of participants.
| CHARACTERISTICS | |
| Age (years) | 73.8 ± 5.8 |
| Gender (M:F) | 317:538 |
| Education (years) | 11.8 ± 2.1 |
| BMI (kg/m2) | 23.2 ± 3.1 |
| Median MMSE scores | 29 (20, 30) |
| Ever smoker | 36 (4.2%) |
| Ever drinker | 354 (41.4%) |
| PAST HISTORY | |
| Hypertension | 429 (50.2%) |
| Diabetes mellitus | 114 (13.3%) |
| Hypercholesterolemia | 281 (32.9%) |
| WEARABLE SENSOR DATA | |
| Walking steps (steps/day) | 5452.9 ± 2778.0 |
| Conversation time (mins/day) | 219.7 ± 86.3 |
| Heart rate (counts/mins/day) | 64.7 ± 6.3 |
| TST (mins/day) | 408.4 ± 69.1 |
| WASO (mins/day) | 22.1 ± 14.1 |
| Sleep efficiency (%/day) | 1.0 ± 0.0 |
| Awakening time count (counts/day) | 0.5 ± 0.3 |
| Nap time (mins/day) | 48.7 ± 39.3 |
M, Male; F, Female; BMI, Body mass index; MMSE, Mini-Mental State Examination; TST, Total sleep time; WASO, time awake after sleep onset; (20, 30), the range of MMSE value is from 20 to 30; mins, minutes.