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See here for an “At a Glance” summary spreadsheet of registration requirements.

See here for UH-specific instructions

What is is a web-based resource that provides patients, their family members, health care professionals, researchers, and the public with easy access to information on publicly and privately supported clinical studies on a wide range of diseases and conditions. ( is a public registry aimed at increased transparency and improved public awareness of research. The website is maintained by the National Library of Medicine (NLM) at the National Institutes of Health (NIH), and registration is required by law for certain clinical trials of drugs, medical devices, biological products and NIH-funded clinical trials. Registration is also required in many cases for journal publication.

To ensure compliance as well as to avoid publication concerns, please make sure you read through the definitions and timelines carefully. The new NIH rules and International Committee of Medical Journal Editors (ICMJE) have very broad definitions of clinical trial. Contact the UH IRB if you have any questions at

What is the purpose of registering a study?

Registration provides a mechanism to ensure continuity in the research enterprise, which supports research integrity through the dissemination of research results, whether positive or negative.

What studies must be registered?

Certain FDA-regulated studies, NIH-funded studies and other unfunded studies with an intent to publish in an ICMJE journal require registration in 


Released in 2007, the Food and Drug Administration Amendments Act of 2007 (FDAAA) required clinical trial registration and results information submission for certain studies.  The “Final Rule,” which clarified these FDAAA requirements for registering studies in, became effective in 2017.

Research that must be registered under FDA requirements generally includes interventional studies (one or more arms) of drugs, biological products, or devices that are subject to FDA regulation, meaning that the trial has one or more sites in the U.S., involves a drug, biologic, or device that is manufactured in the U.S. (or its territories), or is conducted under an investigational new drug application (IND) or investigational device exemption (IDE). 

Are there any tools to help determine which FDA studies are required to be registered on

  • A checklist for determining whether your FDA regulated study is required to be registered at can be found here
  • You can read the Final Rule that clarified FDA requirements for registering studies in here


NIH’s policy applies to clinical trials funded in whole or in part through the NIH extramural and intramural programs.  NIH defines a clinical trial as: a study where one or more human subjects are prospectively assigned to one or more interventions (which may include placebo or other control) to evaluate the effects of those interventions on health-related biomedical or behavioral outcomes. This policy does not apply to NIH-funded clinical trials initiated before the effective date of January 18, 2017, clinical trials that use NIH-supported infrastructure but do not receive NIH funds to support their conduct, or clinical trials of ongoing, non-competing awards. If the answers to the following four questions are yes, your study meets the NIH definition of a clinical trial:

  1. Does the study involve human participants research?
  2. Are participants prospectively assigned to an intervention?
  3. Is the study designed to evaluate the effect of the intervention on the participants?
  4. Is the effect being evaluated a health-related biomedical or behavioral outcome?

Note that if the answers to all four questions above are yes, your study meets the NIH definition of a clinical trial, even if

  • You are studying healthy participants
  • Your study is a single intervention with no comparison group (e.g., placebo or control)
  • Your study is only designed to assess the pharmacokinetics, safety, and/or maximum tolerated dose of an investigational drug
  • Your study is utilizing a behavioral intervention

Are there any tools to help determine which NIH-funded studies are required to be registered on

  • Checklists for determining whether your NIH-funded study is required to be registered at can be found here and here
  • You can read the NIH policy explaining requirements for registering studies in here.


In 2005, the ICMJE required that all clinical trials be entered into a public registry. The ICMJE defines a clinical trial as any research study that prospectively assigns human participants or groups of humans to one or more health-related interventions to evaluate the effects on health outcomes:

  • Health-related interventions include any intervention used to modify a biomedical or health-related outcome (for example, drugs, surgical procedures, devices, behavioral treatments, dietary interventions, and process-of-care changes).
  • Health outcomes include any biomedical or health-related measures obtained in patients or participants, including pharmacokinetic measures and adverse events.

Additionally, for trials that start enrolling participants on or after January 1, 2019, ICMJE will require data sharing statements in the registration as a condition of publication.  These statements will also be required in manuscripts submitted to ICMJE journals starting in July 2018.

Are there any tools to help determine which studies the ICMJE require to be registered on

  • An FAQ to help with determining whether your study is required to be registered at is available here.
  • For more information regarding the ICMJE data sharing statement requirement, please see here


Signatories to the May 18, 2017 World Health Organization International Clinical Trials Registry Platform (WHO ICTRP), including such funding agencies as the Bill and Melinda Gates foundation, require registration and results reporting by their grant recipients.

UH principal investigators should become familiar with the terms of their research foundation sponsors, which may include registering a study for public results dissemination.

Who is responsible for registering a study?

The responsible party is as follows, based on agency:

FDA-regulated studies

The sponsor of the clinical trial, or

The principal investigator (PI) of such clinical trial if so designated by the sponsor, grantee, contractor, or awardee, so long as the PI is responsible for conducting the trial, has access to and control over the data from the clinical trial, has the right to publish the results of the trial, and has the ability to meet all of the FDA’s requirements for submission of clinical trial information.

NIH-funded studies

The awardee or the investigator is responsible for registering the study.

ICMJE requirements

The ICMJE expects the authors to ensure that the study is registered appropriately.

If it is unclear who is responsible for registering an applicable clinical trial, investigators should consult with the sponsor, funding agency, and/or other study investigators to define who the responsible party will be.

What are the compliance timelines for registering a study?

FDA Compliance Dates

The most recent requirements related to initial study registration (from the “Final Rule”) apply to studies initiated on or after January 18, 2017, and results submission requirements apply to trials that reach their primary completion date on or after January 18, 2017. Trials initiated after September 27, 2007 but before January 18, 2017 still require registration; however, those studies would be held to the criteria previously in place before the Final Rule became effective.  If you have a study that was initiated during this specific time period that is not yet listed in, see guidance here for assistance.

  • Registration compliance deadline: 21 days after enrollment of first subject.
  • Results submission compliance deadline: No later than 1 year after the completion date (referred to as the "primary completion date") of the clinical trial, which is defined as the date of final data collection for the primary outcome measure.

NIH Policy Compliance Dates

The policy applies to applications submitted on or after January 18, 2017 for clinical trials initiated on or after January 18, 2017, and competing renewal applications that include a new clinical trial (i.e., a clinical trial initiated on or after January 18, 2017).

  • Registration compliance deadline: 21 days after enrollment of first subject.
  • Results submission compliance deadline: No later than 1 year after the completion date (referred to as the "primary completion date") of the clinical trial, which is defined as the date of final data collection for the primary outcome measure.

ICMJE Compliance Dates

Investigators should register trials that began enrolling patients any time before July 1, 2005 as soon as possible if they wish to submit them to a journal that follows the ICMJE policy.  Beginning September 13, 2005, ICMJE journals will consider trials for publishing only if they were adequately registered before journal submission.

  • Registration compliance deadline: At or before the time of first patient enrollment.
  • Results submission compliance deadline: ICMJE does not require results to be submitted; however, ICMJE encourages registry results reporting even when not required. Results should be submitted no later than 1 year after the completion date (referred to as the "primary completion date") of the clinical trial, which is defined as the date of final data collection for the primary outcome measure.

How often must a study record be updated?

The following data elements must be updated not later than 30 calendar days after a change occurs:

  • Study start date
  • Intervention name(s)
  • Availability of Expanded Access
  • Expanded Access status
  • Overall recruitment status
  • Explanation for change in status
  • Actual enrollment data
  • Individual site status
  • IRB status
  • Completion Date
  • Responsible Party
  • Official Title
  • Contact Information 

Each record must be reviewed for accuracy, and the Record Verification Date updated at least every 12 months, even if there have been no changes to the study. The need to update ends when the study is completed or terminated and the results are entered, approved and posted.  Results must be submitted no later than 12 months after (Primary) Completion Date.

Are there any additional tools available to help me? How do I get started?

Please see our UH user guide for instructions on registering a study, completing your record and updating your record.

Please see our ClinTrials flow chart for help on determining whether you need to register a study.

One-on-one help is available! Contact the IRB at 713-743-9740 or

Where can I find additional information? training material

Case studies/examples showing application of NIH definitional of clinical trials

ICMJE requirements for clinical trials registration system user guide

10 minute webinars for each results module

Helpful Hints (with common study designs examples) Review of Protocol Submissions