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Do you or someone you know want to participate in a clinical study? See information for patients and families.

Support Materials


Protocol Registration and Results System (PRS) Information

Data Element Definitions, Templates, and Checklists

Protocol Registration Data Element Definitions: Describe the registration data items (required and optional) that are entered via PRS

  • Interventional Study Protocol Registration Template: The template is a formatted summary of the relevant interventional study data elements for each registration module. The template is intended to help investigators understand and gather the data needed to complete each registration module.

Expanded Access Data Element Definitions: Describe the expanded access data items (required and optional) that are entered via PRS

Results Data Element Definitions: Describe the results data items (required and optional) that are entered via PRS

  • Simple Results Templates and Results Data Preparation Checklists: The templates are 1--page formatted summaries of the relevant data elements for each results module, and the checklists provide an overview of the necessary data. The templates and checklists are intended to help investigators understand and gather the data needed to complete each results module.

Review Criteria and Other Support Materials

PRS User's Guide: Describes how to use the PRS to submit clinical study information to, including step-by-step instructions. Protocol Review Criteria (PDF): Describe review criteria for study records submitted to the registry (Draft, August 2010) Results Review Criteria (PDF): Describe review criteria for each scientific module in the results section of the study record submitted to the results database (Draft, September 2009)

Helpful Hints (PDF): Tips on entering results data, including three examples of common study models (parallel design, crossover design, and diagnostic accuracy studies), and measure types (Draft, September 2009)

U.S. Laws, Regulations, and Guidance

NIH Policy on Registration and Results Submission of NIH-Funded Clinical Trials

The U.S. National Institutes of Health (NIH) issued a final policy establishing the expectation that every clinical trial funded in whole or in part by NIH is registered on and has summary results submitted and posted in a timely manner. For additional information on the NIH Policy, see History, Policies, and Laws on

Food and Drug Administration Amendments Act of 2007 (FDAAA) and Final Rule (42 CFR Part 11)

The Final Rule for Clinical Trials Registration and Results Information Submission (42 CFR Part 11) was issued by the U.S. Department of Health and Human Services in September 2016. The Final Rule clarifies and expands the regulatory requirements and procedures for submitting registration and summary results information of clinical trials on, in accordance with Section 801 of FDAAA (PDF). The regulation is effective on January 18, 2017 and responsible parties are expected to be in compliance as of April 18, 2017. For additional information on the Final Rule for FDAAA 801, see History, Policies, and Laws on

National Cancer Institute (NCI) Clinical Trial Access Policy

NCI issued its Policy Ensuring Public Availability of Results from NCI-supported Clinical Trials. NCI expects Final Trial Results for all NCI-supported Covered Trials to be reported in a publicly accessible manner within 12 months of the trial's Primary Completion Date.

Department of Veterans Affairs (VA) Clinical Trial Registration and Results Submission Policy

The VA policy on clinical trial registration and submission of summary results requires principal investigators (PIs) of VA Office of Research and Development (ORD)-funded clinical trials to register their trials and submit summary results to as a condition of funding. This policy uses the same definition of clinical trial as the International Committee of Medical Journal Editors and the World Health Organization. PIs must register their VA ORD-funded clinical trial on in order for study funds to be distributed. They must also update the study record in a timely manner and submit summary results information within 1 year of the Completion Date (see Primary Completion Date data element on

Center for Medicare and Medicaid Services (CMS)

CMS issued a National Coverage Determination (NCD) for Routine Costs in Clinical Trials, Section 310.1 (July 2007). Claims for routine costs of qualifying clinical trials as well as reasonable and necessary items and services used to diagnose and treat complications arising from participation in all clinical trials covered by Medicare will require health care providers and suppliers to report a Identifier (NCT Number) .

Patient-Centered Outcomes Research Institute (PCORI)

PCORI adopted a process for peer review and public release of the results of the comparative clinical effectiveness research studies that it funds. This process includes registering and submitting summary results information to for relevant clinical trials and observational studies. Patient registries are similarly required to be registered on and the Agency for Healthcare Research and Quality's Registry of Patient Registries (RoPR).

Note: Methodological and other projects that are not clinical studies should not be submitted to and must instead be registered in the National Library of Medicine Health Services Research Projects in Progress database (HSRProj).

Food and Drug Administration Modernization Act of 1997 (FDAMA)

Section 113 of FDAMA mandated the creation of a clinical trials database to register clinical trials of investigational drugs for "serious or life-threating diseases and conditions" (November 1997).

International Policies

International Committee of Medical Journal Editors (ICMJE)

ICMJE issued a clinical trial registration policy as part of the ICMJE Recommendations for the Conduct, Reporting, Editing, and Publication of Scholarly Work in Medical Journals , which is followed by more than 1,000 journals. The ICMJE Recommendations encourage journal editors to require that all clinical trials be entered in a public registry before the start of participant enrollment in order for the trials to be considered for publication. In June 2017, ICMJE amended its recommendations to include registration of an individual participant data (IPD) sharing statement (see IPD Sharing Statement data element on as an additional consideration for publication of reports for clinical trials that begin enrolling participants on or after January 1, 2019.

World Health Organization (WHO)

The WHO International Clinical Trials Registry Platform (ICTRP) policy specifies that "the registration of all interventional trials is a scientific, ethical and moral responsibility." Accordingly, ICTRP provides a global forum for trial registries to share best practices and promotes the development of specific criteria for primary registries in the WHO Registry Network. In addition, the WHO Statement on Public Disclosure of Clinical Trials Results specifies that "[t]here is an ethical imperative to report the results of all clinical trials, including those of unreported trials conducted in the past."

  • WHO ICTRP Trial Registration Data Set: Describes the minimum amount of trial information that must appear in a clinical study registry in order for a given trial to be considered fully registered by the WHO
  • WHO ICTRP Search Portal: Provides a single point of access to studies registered in various international registries, including data available on
This page last reviewed in January 2018