| Variables | Number | Proportion (%) |
| Quality of the requester | ||
| Specialist doctor | 90 | 47.12 |
| General practitioner | 63 | 32.98 |
| Paramedic | 29 | 15.18 |
| Residents | 9 | 4.71 |
| Number of years of experience | ||
| <5 | 20 | 10.47 |
| [5 - 10[ | 42 | 21.99 |
| [10 - 15[ | 56 | 29.32 |
| ≥15 | 73 | 38.22 |