Note: Includes phase 1-3 industry sponsored trials. Medical device trials & trials which were terminated or suspended are excluded from data. Data updates since the 2022 report suggest the fall in years 2021/2022 were related to retrospective data updates, rather than representing a major fall in sites per trial.
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Average total number of site per drug trial started worldwide 2012-2023
In the pandemic years 2020 to 2023, the average number of sites per clinical drug trial worldwide was relatively stable, with of 18 in 2021. This statistic shows the average total number of sites per clinical drug trial worldwide from 2012 to 2023.
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IQVIA (Clinical Trial Repository Databases), & EFPIA. (December 9, 2024). Average total number of sites per clinical trial started worldwide from 2012 to 2023 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 26, 2026, from /statistics/1345947/average-number-sites-per-drug-trial-started-by-phase-worldwide/
IQVIA (Clinical Trial Repository Databases), und EFPIA. "Average total number of sites per clinical trial started worldwide from 2012 to 2023." Chart. December 9, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 26, 2026. /statistics/1345947/average-number-sites-per-drug-trial-started-by-phase-worldwide/
IQVIA (Clinical Trial Repository Databases), EFPIA. (2024). Average total number of sites per clinical trial started worldwide from 2012 to 2023. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 26, 2026. /statistics/1345947/average-number-sites-per-drug-trial-started-by-phase-worldwide/
IQVIA (Clinical Trial Repository Databases), and EFPIA. "Average Total Number of Sites per Clinical Trial Started Worldwide from 2012 to 2023." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 9 Dec 2024, /statistics/1345947/average-number-sites-per-drug-trial-started-by-phase-worldwide/
IQVIA (Clinical Trial Repository Databases) & EFPIA, Average total number of sites per clinical trial started worldwide from 2012 to 2023 ÌÇÐÄÆƽâ°æ, /statistics/1345947/average-number-sites-per-drug-trial-started-by-phase-worldwide/ (last visited July 26, 2026)
Average total number of sites per clinical trial started worldwide from 2012 to 2023 [Graph], IQVIA (Clinical Trial Repository Databases), & EFPIA, December 9, 2024. [Online]. Available: /statistics/1345947/average-number-sites-per-drug-trial-started-by-phase-worldwide/
