Trends, Charts, and Maps – ClinicalTrials.gov

May 20, 2020

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ClinicalTrials.gov currently lists 339,863 studies with locations in all 50 States and in 214 countries.

As of March 2020, ClinicalTrials.gov receives about 3.5 million visitors monthly.

Contents

Locations of Registered Studies

The chart below shows the distribution of locations for all studies registered on ClinicalTrials.gov.

Percentage of Registered Studies by Location (as of May 19, 2020)
Total of 339,863 studies

Study Location Count Pie Chart

██ Non-U.S. only (50%)
██ U.S. only (34%)
██ Both U.S. and non-U.S. (5%)
██ Not provided (12%)
Location Number of Registered Studies and Percentage of Total
(as of May 19, 2020)
Non-U.S. only 168,269   (50%)
U.S. only 113,921   (34%)
Both U.S. and non-U.S. 17,484   (5%)
Not provided 40,189   (12%)
Total 339,863   (100%)

Locations of Recruiting Studies

The chart below shows the distribution of locations for recruiting studies registered on ClinicalTrials.gov.

Percentage of Recruiting Studies by Location (as of May 19, 2020)
Total of 51,064 recruiting studies

Recruiting Study Location Count Pie Chart

██ Non-U.S. only (61%)
██ U.S. only (34%)
██ Both U.S. and non-U.S. (5%)
Location Number of Recruiting Studies and Percentage of Total
(as of May 19, 2020)
Non-U.S. only 31,053   (61%)
U.S. only 17,366   (34%)
Both U.S. and non-U.S. 2,518   (5%)
Not provided 127   (0%)
Total 51,064   (100%)

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Map of Studies Registered on ClinicalTrials.gov

The See Studies on Map page provides an interactive map of studies that are registered on ClinicalTrials.gov.

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Types of Registered Studies

The table below shows the number and types of studies that are registered and have results posted on ClinicalTrials.gov.

Study and Intervention Type
(as of May 19, 2020)		 Number of Registered Studies and Percentage of Total Number of Studies With Posted Results and Percentage of Total***
Total 339,863 43,086
Interventional 266,997   (79%) 40,468   (94%)
Type of Intervention* 148,495 31,245
86,853 7,811
28,078 2,197
34,440 5,427
Observational 71,363   (21%) 2,618   (6%)
Expanded Access 647 N/A

* A study may include more than one type of intervention, meaning that a single study may be counted more than once. Because of this, the sum of counts by type of intervention do not equal the total number of interventional studies.
** A total of 856 applicable device clinical trials were submitted as “delayed posting” under the Food and Drug Administration Amendments Act of 2007 (FDAAA). That is, the Responsible Party indicated that the trial includes a device not previously approved or cleared by the Food and Drug Administration (U.S. FDA) for any use. These trials are not included in the counts of trials with at least one device.
*** Results are required to be submitted only for certain studies. For example, results submission is generally not required for observational studies; trials completed before 2008; and trials that include drug, biological, or device products not previously approved by the U.S. FDA for any use (if the Primary Completion Date is before January 18, 2017). See FDAAA 801 and the Final Rule for further information.

N/A = not applicable

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The graph and table below show the total number of studies posted on ClinicalTrials.gov since 2000, based on the First Posted date. The first version of ClinicalTrials.gov was made available to the public on February 29, 2000.

Registered Studies Over Time Graph

Key:

ICMJE: Indicates when the International Committee of Medical Journal Editors (ICMJE) began requiring trial registration as a condition of publication (September 2005)

FDAAA: Indicates when the registration requirements of FDAAA began and were implemented on ClinicalTrials.gov (December 2007)

Number of Registered Studies by Year (as of May 19, 2020)

Year First Posted Start of Year During Year End of Year
2000 † 1,255 † 2,119 2,119
2001 2,119 1,773 3,892
2002 3,892 1,379 5,271
2003 5,271 3,588 8,859
2004 8,859 3,166 12,025
2005 12,025 12,798 24,823
2006 24,823 10,917 35,740
2007 35,740 12,549 48,289
2008 48,289 17,566 65,855
2009 65,855 17,010 82,865
2010 82,865 17,350 100,215
2011 100,215 17,821 118,036
2012 118,036 19,466 137,502
2013 137,502 20,436 157,938
2014 157,938 23,311 181,249
2015 181,249 24,113 205,362
2016 205,362 27,795 233,157
2017 233,157 29,187 262,344
2018 262,344 30,976 293,320
2019 293,320 32,523 325,843
2020 325,843 14,020 ‡ 339,863 ‡

†ClinicalTrials.gov was first launched on February 29, 2000 with 1,255 studies available
‡As of May 19, 2020

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The graph and table below show the number of registered studies with results posted on ClinicalTrials.gov, based on the Results First Posted date. ClinicalTrials.gov launched its results database in September 2008, at which time sponsors or investigators could begin submitting results for their registered studies. The results database was first developed to accommodate the results submission requirements outlined in FDAAA. See About the Results Database for more information.

Registered Studies With Posted Results Over Time Graph

Number of Registered Studies With Posted Results by Year (as of May 19, 2020)

Year Results First Posted Start of Year During Year End of Year
2008 † 0 † 41 41
2009 41 1,098 1,139
2010 1,139 1,617 2,756
2011 2,756 2,200 4,956
2012 4,956 2,804 7,760
2013 7,760 3,093 10,853
2014 10,853 4,828 15,681
2015 15,681 3,801 19,482
2016 19,482 4,185 23,667
2017 23,667 5,827 29,494
2018 29,494 4,659 34,153
2019 34,153 6,522 40,675
2020 40,675 2,411 ‡ 43,086 ‡

†ClinicalTrials.gov Results Database was launched in September 2008, but initially held no results
‡As of May 19, 2020

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