| Clinical signs | Workforce | Percentages |
| Low back pain | 28 | 66.7 |
| Radicalgies | 36 | 85.7 |
| Radicular lamination | 37 | 88.1 |
| Genito-sphincter disorders | 12 | 28.6 |
| Paraparesis | 10 | 23.8 |