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. 2023 Jun 13;13(4):427–439. doi: 10.3233/JPD-239901

Table 5.

Enrollment table for Active Phase 1-3 drug trials

# of trials Target enrollment Average/trial median min max
Phase 1 47 1,591 34 20 3 120
Phase 2 72 9,091 126 67 10 732
Phase 3 20 6,005 300 310 50 600
Total 139 16,687