| Factor | Bivariate logistic analysis | Multivariate logistic analysis |
|---|
| P | Crude OR (95% C.I.) | P | Adjusted OR (95% C.I.) |
|---|
| Hospital level |
| Primary hospital | Reference | Reference |
| Secondary hospital | 0.001 | 1.297 (1.117–1.506) | 0.008 | 1.309 (1.128–1.519) |
| Tertiary hospital | < 0.001 | 1.834 (1.413–2.380) | < 0.001 | 1.852 (1.427–2.403) |
| Sex (0 = male, 1 = female) | < 0.001 | 2.908 (2.425–3.487) | 0.039 | 2.048 (1.036–4.051) |
| Exercise in leisure time |
| Never/almost never | Reference | Reference |
| Sometimes | < 0.001 | 0.410 (0.355–0.473) | 0.041 | 0.448 (0.209–0.957) |
| Often | < 0.001 | 0.327 (0.278–0.383) | < 0.001 | 0.352 (0.169–0.735) |
| Workload |
| Work hours per week |
| < 40 | Reference | Reference |
| 40–45 | < 0.001 | 2.337 (2.029–2.693) | 0.042 | 1.908 (1.021–3.565) |
| > 45 | < 0.001 | 3.104 (2.623–3.672) | < 0.001 | 2.517 (1.270–4.988) |
| Number of patients in the charge of at night |
| < 30 | Reference | Reference |
| 30–60 | < 0.001 | 2.560 (2.191–2.991) | 0.012 | 2.201 (1.102–4.397) |
| > 60 | < 0.001 | 8.062 (6.721–9.670) | < 0.001 | 6.080 (3.190–11.586) |
| Night shift frequency per month |
| Never | Reference | Reference |
| 1–3 | < 0.001 | 2.279 (1.839–2.824) | 0.146 | 2.018 (0.918–4.437) |
| 4–6 | < 0.001 | 4.339 (3.527–5.339) | < 0.001 | 3.717 (1.807–7.647) |
| ≥ 7 | < 0.001 | 9.050 (7.162–11.438) | < 0.001 | 7.156 (3.357–15.256) |
| Occupational stress |
| Psychological job demand | 0.003 | 2.257 (1.086–4.688) | 0.018 | 2.168 (1.062–4.426) |
| Job control | < 0.001 | 0.425 (0.195–0.927) | < 0.001 | 0.451 (0.212–0.961) |
| Workplace social support | < 0.001 | 0.348 (0.158–0.765) | < 0.001 | 0.378 (0.180–0.794) |
| Job insecurity | 0.011 | 2.447 (1.054–5.685) | 0.022 | 2.408 (1.045–5.551) |
