Trends, Charts, and Maps

ClinicalTrials.gov currently lists 158,491 studies with locations in all 50 states and in 185 countries. ClinicalTrials.gov receives more than 98 million page views per month and 64,000 unique visitors daily (as of July 2013).

Locations of Registered Studies

This chart shows the distribution of locations for all studies registered on ClinicalTrials.gov.
Total N = 158,491 studies

(Data as of January 05, 2014)

	Non-U.S. Only (44%)
	U.S. Only (40%)
	Not Specified (9%)
	Both U.S. & Non-U.S. (6%)

Location	Number of Registered Studies and Percentage of Total
Non-U.S. Only	70,435 (44%)
U.S. Only	64,065 (40%)
Not Specified*	14,210 (9%)
Both U.S. & Non-U.S.	9,781 (6%)
Total	158,491

* Not Specified: The location of the study was not provided by the Sponsor.

(Data as of January 05, 2014)

Locations of Recruiting Studies

This chart shows the distribution of locations for recruiting studies registered on ClinicalTrials.gov.
Total N = 31,642 studies

(Data as of January 05, 2014)

Recruiting Study Location Count Pie Chart

	Non-U.S. Only (50%)
	U.S. Only (44%)
	Both U.S. & Non-U.S. (6%)

Location	Number of Recruiting Studies and Percentage of Total
Non-U.S. Only	15,905 (50%)
U.S. Only	13,784 (44%)
Both U.S. & Non-U.S.	1,953 (6%)
Total	31,642

(Data as of January 05, 2014)

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Map of Studies Registered on ClinicalTrials.gov

See Studies on a Map for an interactive map of studies that are registered on ClinicalTrials.gov.

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Types of Registered Studies

This table shows the number and types of studies that are registered and for which results are available on ClinicalTrials.gov.

(Data as of January 05, 2014)

Study and Intervention Type		Number of Registered Studies and Percentage of Total	Number of Studies With Posted Results and Percentage of Total***
Total		158,491	10,900
Interventional		128,242 (80%)	10,208 (93%)
Type of Intervention*	Drug or biologic	84,392	8,645
	Behavioral, other	32,792	1,240
	Surgical procedure	14,233	478
	Device**	11,813	973
Observational		29,503 (18%)	692 (6%)
Expanded Access		227	N/A

* A study may include more than one type of intervention (that is, 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 519 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 has indicated that such a trial includes a device not previously approved or cleared by the U.S. FDA for any use. These are not included in the count of trials with at least one device.
*** Results are only required to be submitted for certain trials. For example, results submission is generally not required for trials of drugs, biologics, or devices that have not been approved by FDA; observational studies; and trials completed before 2008.

N/A = not applicable

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Number of Registered Studies Over Time

The graph below shows the total number of studies registered on ClinicalTrials.gov since 2000, based on the First Received Date. The first version of ClinicalTrials.gov was made available to the public on February 29, 2000.

(Data as of January 05, 2014)

Key

ICMJE: Indicates when the International Committee of Medical Journal Editors began requiring trial registration as a condition of publication under the Uniform Requirements for Manuscripts Submitted to Biomedical Journals (URM) (September 2005).

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

Year	Total Number of Registered Studies
2000	5,640
2001	6,991
2002	8,580
2003	10,246
2004	12,033
2005	24,956
2006	35,889
2007	49,290
2008	66,316
2009	83,489
2010	101,218
2011	119,425
2012	138,955
2013	158,437

(Data as of January 05, 2014)

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Number of Registered Studies With Posted Results Over Time

The graph below shows the number of registered studies with results posted on ClinicalTrials.gov, based on the Results First Received Date. ClinicalTrials.gov launched its results database in September 2008, at which time sponsors or investigators were allowed to begin submitting results for their registered studies. The results database was developed to accommodate results submission requirements outlined in FDAAA.

(Data as of January 05, 2014)