Worldwide, there was a large increase in the average total number of patients per clinical drug trial from 2019 to 2023. This statistic shows the average number of patients per clinical drug trial started worldwide from 2012 to 2023.
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IQVIA, & EFPIA. (December 9, 2024). Average total number of patients per clinical drug trial started worldwide from 2012 to 2023 [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 20, 2026, from /statistics/1346484/average-number-subjects-per-trial-started-by-phase-worldwide/
IQVIA, und EFPIA. "Average total number of patients per clinical drug trial started worldwide from 2012 to 2023." Chart. December 9, 2024. ÌÇÐÄÆÆ½â°æ. Accessed July 20, 2026. /statistics/1346484/average-number-subjects-per-trial-started-by-phase-worldwide/
IQVIA, EFPIA. (2024). Average total number of patients per clinical drug trial started worldwide from 2012 to 2023. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 20, 2026. /statistics/1346484/average-number-subjects-per-trial-started-by-phase-worldwide/
IQVIA, and EFPIA. "Average Total Number of Patients per Clinical Drug Trial Started Worldwide from 2012 to 2023." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 9 Dec 2024, /statistics/1346484/average-number-subjects-per-trial-started-by-phase-worldwide/
IQVIA & EFPIA, Average total number of patients per clinical drug trial started worldwide from 2012 to 2023 ÌÇÐÄÆÆ½â°æ, /statistics/1346484/average-number-subjects-per-trial-started-by-phase-worldwide/ (last visited July 20, 2026)
Average total number of patients per clinical drug trial started worldwide from 2012 to 2023 [Graph], IQVIA, & EFPIA, December 9, 2024. [Online]. Available: /statistics/1346484/average-number-subjects-per-trial-started-by-phase-worldwide/