Distribution of studies on SLE epidemiology (n=113) in 21 regions
| Region | No of studies* |
| Europe, western | 32 |
| North America, high income | 28 |
| Asia, east | 8 |
| Latin America, central | 8 |
| North Africa and the Middle East | 8 |
| Asia Pacific, high income | 6 |
| Australasia | 4 |
| Caribbean | 4 |
| Europe, eastern | 3 |
| Latin America, southern | 3 |
| Latin America, tropical | 3 |
| Asia, south | 2 |
| Europe, central | 2 |
| Asia, central | 1 |
| Latin America, Andean | 1 |
SLE, systemic lupus erythematosus.