- Sociodemographic characteristics of participants.
| Characteristics | n | % |
|---|---|---|
| Sex | ||
| Female | 131 | 50.6 |
| Male | 128 | 49.4 |
| Age (year) | ||
| ≤20 | 25 | 9.7 |
| 21–30 | 110 | 42.5 |
| 31–40 | 96 | 37.0 |
| 41–50 | 26 | 10.0 |
| >50 | 2 | 0.7 |
| Mean ± SD | 30.2±8.6 | |
| Handedness | ||
| Left | 27 | 10.4 |
| Right | 232 | 89.6 |
| Education level | ||
| Below high school | 24 | 9.3 |
| High school | 93 | 35.9 |
| Graduate | 136 | 52.5 |
| Postgraduate | 6 | 2.3 |
| Marital status | ||
| Single | 124 | 47.9 |
| Married | 126 | 48.6 |
| Divorced | 7 | 2.7 |
| Widowed | 2 | 0.8 |
| Employed | ||
| No | 104 | 40.2 |
| Yes | 155 | 59.8 |
| Work timing | ||
| Day time | 130 | 83.8 |
| Shifts (morning, evening, or night) | 25 | 16.1 |