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172146 Studies found for: Participants

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Map Legend
Source:https://ClinicalTrials.gov
Region Name Number of Studies
World 172,146
Africa [map] 6,721
Central America [map] 2,139
East Asia [map] 20,637
Japan 4,058 [studies]
Europe [map] 43,897
Middle East [map] 8,764
North America 83,064
Canada [map] 13,803 [studies]
Mexico 2,905 [studies]
United States [map] 74,456 [studies]
North Asia [map] 4,759
Pacifica [map] 5,875
South America [map] 7,154
South Asia [map] 3,401
Southeast Asia [map] 4,535
Hints:

Click on a [map] link to show a map of that region.

Click on a [studies] link to search within your current results for studies in that region. Use the back button to return to this list and try another region.

Studies with no locations are not included in the counts or on the map.

Studies with multiple locations are included in each region containing locations.