| Socio-professional characteristics | Effective | % | |
| Age group | <45 years | 46 | 50 |
| 45 - 55 years | 41.12 | 44.7 | |
| >55 years | 4.87 | 5.3 | |
| Gender | Male | 57 | 61.3 |
| Female | 35 | 38.7 | |
| Matrimonial state | Single | 20 | 21.7 |
| Married | 70 | 76.1 | |
| Divorced | 1 | 1.1 | |
| Widower | 1 | 1.1 | |
| Number of dependent children | 0 | 3 | 4.5 |
| 1 - 3 | 34 | 74 | |
| >3 | 15 | 22.8 | |
| Medical history | Diabetes | 8 | 8.7 |
| Hypertension | 3 | 3.26 | |
| Musculoskeletal disorder | 7 | 7.6 | |
| Others | 7 | 7.6 | |
| Occupational categories | Nurse | 73 | 79.3 |
| Laboratory agent | 4 | 43 | |
| Administrator | 1 | 1.1 | |
| Anesthetist technician | 9 | 9.8 | |
| Radiologist technician | 5 | 5.4 | |
| Average occupational seniority in night shift | <10 years | 25 | 27.2 |
| 10 - 20 years | 5 | 5.4 | |
| ≥21 years | 58 | 65.9 | |
| Possible pattern for retirement | Age | 29 | 31.5 |
| Private reasons | 20 | 8.7 | |
| Occupational reasons | 8 | 21.7 | |
| Health reasons | 4 | 4.3 | |