Table 1. demographic information of the patients.
| Variable | N (%) | |
|---|---|---|
| Gender | male | 636(93) |
| female | 47(7) | |
| Marital status | Single | 139(20) |
| Married | 543(80) | |
| Occupation | Manual Worker | 532(78) |
| Administrative job | 80(12) | |
| construction worker | 24(4) | |
| Other | 47(7) | |
| Education | Under bachelor degree | 631(92) |
| Bachelor's degree and higher | 52(8) | |
| Smoking | Yes | 204(30) |
| No | 479(70) | |
| shiftwork | Yes | 455(67) |
| No | 229(33) | |
| Sleepiness | Yes | 154(22) |
| No | 550(78) | |
| Opioid user | Yes | 98(14) |
| No | 584(86) | |
| Job | construction worker | 24(3%) |
| Manual Worker | 532(78%) | |
| Administrative job | 80(12%) | |
| others | 47(7%) |
* Differences was evaluated using Pearson’s chi-square and one-way ANOVA test.