Table 2.
Participants’ daily physiological and behavioral features.
| Feature | Values |
| hrmeana (bpm), mean (SD) | 74.87 (8.6) |
| hrstdb (bpm), mean (SD) | 13.42 (3.45) |
| hrentropyc, mean (SD) | 0.63 (0.21) |
| steps, mean (SD) | 7545 (4419.36) |
| duration_entropy_non_step, mean (SD) | 2.34 (0.34) |
| duration_entropy_step, mean (SD) | 1.69 (0.32) |
| nap_count, mean (SD) | 0.56 (0.69) |
| brightness_sleep (scale of 1-100), mean (SD) | 18.63 (23.09) |
| sleep_duration (min), mean (SD) | 406.46 (172.01) |
| nap_duration (min), mean (SD) | 52.99 (108.23) |
| sleep_regularity_3 days (scale of –100 to 100), mean (SD) | 52.25 (28.3) |
| sleep_regularity_5 days (scale of –100 to 100), mean (SD) | 52.1 (22.6) |
| sleep_regularity_7 days (scale of –100 to 100), mean (SD) | 52.02 (19.26) |
| deep_sleep (scale of 1-5), mean (SD) | 3.2 (1.14) |
| immediate_sleep (scale of 1-5), mean (SD) | 3.55 (1.14) |
| fatigue_recover (scale of 1-5), mean (SD) | 2.84 (1.05) |
| mid_awake (scale of 1-5), mean (SD) | 3.2 (1.31) |
| sleep_satisfy (scale of 1-5), mean (SD) | 2.85 (1.02) |
| alcohol_amount (cups), mean (SD) | 0.3 (0.63) |
| caffeine_amount (cups), mean (SD) | 1.53 (1.46) |
| worktime_today_duration (h), mean (SD) | 5.62 (4.19) |
| worktime_today_duration (1: midnight-8 AM; h), mean (SD) | 1.52 (2.85) |
| worktime_today_duration (2: 8 AM-4 PM; h), mean (SD) | 2.15 (3.25) |
| worktime_today_duration (3: 4 PM-midnight; h), mean (SD) | 1.96 (3.08) |
| extrawork_activities (n=1865), n (%) | 924 (49.54) |
| sleep_prev_24d (n=2092), n (%) | 2088 (99.81) |
| wake_natural (n=1890), n (%) | 793 (41.96) |
| wake_alarm (n=1890), n (%) | 882 (46.67) |
| wake_other (n=1890), n (%) | 198 (10.48) |
ahrmean: average daily heart rate.
bhrstd: SD of daily heart rate.
chrentropy: entropy of daily heart rate.
dsleep_prev_24: binary indicator of sleep in the previous 24 hours.