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Distribution of Alzheimer's disease trials by phase
| Phase 1 | Phase 2 | Phase 3 | Phase 4 | |
|---|---|---|---|---|
| United Statesa | 13 | 29 | 22 | 7 |
| Western Europe | 7 | 17 | 15 | 1 |
| Canada | 0 | 10 | 11 | 1 |
| Eastern Europe | 0 | 10 | 11 | 0 |
| Australia/New Zealand | 2 | 6 | 10 | 1 |
| Japan | 1 | 4 | 9 | 2 |
| South America | 0 | 5 | 7 | 0 |
| Korea | 0 | 3 | 5 | 1 |
| Russia | 0 | 7 | 4 | 0 |
| Middle East | 1 | 3 | 3 | 3 |
| Chinab | 1 | 2 | 4 | 1 |
| Africa | 0 | 1 | 4 | 0 |
| Mexico/Central America | 0 | 2 | 3 | 0 |
| India/Southeast Asia | 0 | 0 | 1 | 1 |
aThe United States had one trial listed as phase I/II. bChina had one trial listed as phase II/III.
