High | Design | Prospective study design |
| | Clearly defined occupational group |
| | Clearly defined comparison group without occupational risk |
| | |
| Diagnosis | Clinical diagnosis of Lyme borreliosis (generally by physician) |
| | Laboratory confirmation (by western blot*) |
| | |
Moderate | Design | Cross sectional or case-control study design |
| | Clearly defined occupational group |
| | Clearly defined comparison group without occupational risk |
| | |
| Diagnosis | Clinical diagnosis of Lyme borreliosis (generally by physician) |
| | Positive ELISA or IFA serology |
| | |
Low | Design | Any design |
| | Clearly defined occupational group |
| | Clearly defined comparison group without occupational risk |
| | |
| Diagnosis | Diagnosis based on self reported symptoms or serology only |
| | Positive ELISA or IFA serology |
| | |
None | Design | Any design |
| | No defined occupational group |
| | No defined comparison group without occupational risk |
| | |
| Diagnosis | Diagnosis based on self report |
| | Positive ELISA or IFA serology |