STD rates (new cases per 100 000) in the Eight Americas, 2008
| America | Primary and secondary syphilis | Gonorrhoea | Chlamydia |
| 1. Asian | 1.4 | 14.5 | 100.6 |
| 2. Northland low-income rural white | 0.3 | 9.2 | 125.5 |
| 3. Middle America | 2.7 | 30.0 | 172.4 |
| 4. Low-income whites in Appalachia and the Mississippi Valley | 1.1 | 23.8 | 139.4 |
| 5. Western Native American | 2.9 | 80.9 | 820.7 |
| 6. Black Middle America | 14.5 | 475.3 | 1,063.6 |
| 7. Southern low-income rural black | 15.3 | 482.2 | 1,109.4 |
| 8. High-risk urban black | 25.3 | 507.2 | 1,155.9 |