Means (M), SDs and correlations of variables
| Variables | M | SD | 1 | 2 | 3 | 4 |
| 1. WPV | 2.750 | 2.100 | 1 | |||
| 2. Psychological stress | 3.330 | 0.861 | 0.382** | 1 | ||
| 3. Subjective sleep quality | 2.290 | 0.763 | −0.281** | −0.471** | 1 | |
| 4. Subjective health | 2.470 | 0.643 | −0.302** | −0.464** | 0.524** | 1 |
**p<0.01.
WPV, workplace violence.