Table 1 Participants’ demographics and working conditions at enrollment (n = 40)
Mean (SD)/number (%) | Range | |
|---|---|---|
Age, mean (SD), years | 28.3 (5.1) | 23.0–41.0 |
Job tenure, mean (SD), years | 5.3 (4.0) | 1.0–18.0 |
Body mass index, mean (SD), kg/m2 | 19.6 (1.8) | 16.0–25.0 |
Marital status, no. (%) | ||
Married or with a partner | 7 (17.5%) | |
Not married | 33 (82.5%) | |
Dependent, children, no. (%) | ||
Yes | 1 (2.5%) | |
No | 39 (97.5%) | |
Dependent, care role, no. (%) | ||
Yes | 1 (2.5%) | |
No | 39 (97.5%) | |
Drink alcohol, no. (%) | ||
Yes | 19 (47.5%) | |
No | 21 (52.5%) | |
Smoke cigarettes, no. (%) | ||
Yes | 0 (0%) | |
No | 40 (100.0%) | |
Exercise-oriented, no. (%) | ||
Yes | 11 (27.5%) | |
No | 29 (72.5%) | |
Sleep-oriented, no. (%) | ||
Yes | 24 (60.0%) | |
No | 16 (40.0%) | |
Activity-oriented, no. (%) | ||
Yes | 10 (25.0%) | |
No | 30 (75.0%) | |
Number of night shifts per month, mean (SD) | 4.6 (0.9) | 2.0–6.0 |
Overtime hours in the previous month, no. (%) | ||
< 10 h | 11 (27.5%) | |
< 20 h | 17 (42.5%) | |
≥ 20 h | 12 (30.0%) | |
Experience of quick return, no. (%), a | ||
Yes | 12 (30.0%) | |
No | 28 (70.0%) | |
Change in workload, no. (%) | ||
Decreased | 3 (7.5%) | |
Not change | 27 (67.5%) | |
Increased | 10 (25.0%) |