Association between latitude and prevalence of Behçet’s disease (adapted from Demirkesen et al25)
| Latitude (°N) | Country/ethnic group | Prevalence of Behçet’s disease per 105 |
|---|---|---|
| 25 | Saudi Arabia | 20 |
| 31 | Palestinian | >10 |
| 32 | Iran | 16.7 |
| 32 | Morocco | >15 |
| 36 | Japan | 13.5 |
| 39 | Portugal | 1.53 |
| 39 | Turkey | 100 |
| 42 | Italy | 2.5 |
| 52 | England | 0.5 |
| 56 | Scotland | 0.27 |
| 60 | Sweden | 1.18 |
| 62 | Amerindian | Not reported |