This statistic shows the distribution of the top 20 countries worldwide based on clinical trial participants in 2015-2019, by share. In the United States, there were some 35 percent of all clinical trial participants worldwide, which was the largest share amongst all the other countries.
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Food and Drug Administration. (November 23, 2020). Top 20 clinical trial participant countries worldwide in 2015-2019, by share of participants [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 26, 2026, from /statistics/830035/top-participant-countries-for-clinical-trials-worldwide-by-share/
Food and Drug Administration. "Top 20 clinical trial participant countries worldwide in 2015-2019, by share of participants." Chart. November 23, 2020. ÌÇÐÄÆƽâ°æ. Accessed July 26, 2026. /statistics/830035/top-participant-countries-for-clinical-trials-worldwide-by-share/
Food and Drug Administration. (2020). Top 20 clinical trial participant countries worldwide in 2015-2019, by share of participants. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 26, 2026. /statistics/830035/top-participant-countries-for-clinical-trials-worldwide-by-share/
Food and Drug Administration. "Top 20 Clinical Trial Participant Countries Worldwide in 2015-2019, by Share of Participants." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 23 Nov 2020, /statistics/830035/top-participant-countries-for-clinical-trials-worldwide-by-share/
Food and Drug Administration, Top 20 clinical trial participant countries worldwide in 2015-2019, by share of participants ÌÇÐÄÆƽâ°æ, /statistics/830035/top-participant-countries-for-clinical-trials-worldwide-by-share/ (last visited July 26, 2026)
Top 20 clinical trial participant countries worldwide in 2015-2019, by share of participants [Graph], Food and Drug Administration, November 23, 2020. [Online]. Available: /statistics/830035/top-participant-countries-for-clinical-trials-worldwide-by-share/
