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Search the Studies - NIH Clinical Research Studies

Help & Search Tips

Search Tips | Glossary | Disclaimers

Search Tips

The NIH Clinical Research Studies search performs word-by-word and word-combination searches through all the clinical studies in the database and retrieves those clinical studies that contain the user's search term(s). The clinical studies retrieved are listed by each individual word and multiple combinations of the words within the user's search term(s).

Search Logic Rules

  • Single word searches
    • example: diabetes
    • result: finds clinical studies containing the word diabetes
  • Multiple word searches
    • example: diabetes insulin
    • result: finds clinical studies containing either word (diabetes OR insulin) and both words (diabetes and insulin)

Displayed Results

  • The results of all the words entered for the search can be reviewed by scrolling down on the first Search Results page.
  • Additional links are provided to review the results of the search by each individual word and multiple combinations of the words within the user's search term(s). For example, clicking on the [+diabetes] link will display all clinical studies with the word diabetes and not the word insulin. The [+diabetes +insulin] link will display all the clinical studies with both words [+diabetes +insulin].

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Explanation Of Clinical Studies Data Items

Name of the clinical research project representative of the studies primary focus.

Description of the study.

Sponsoring Institute
The table below lists institute abbreviations, acronyms, and full names.



Institute Name



National Institute on Alcohol Abuse & Alcoholism



National Institute on Aging



National Institute of Arthritis and Musculoskeletal and Skin Diseases



National Cancer Institute



National Institutes of Health Clinical Center



National Institute of Child Health and Human Development



National Institute of Dental and Craniofacial Research



National Institute on Deafness and Other Communication Disorders



National Institute of Diabetes and Digestive and Kidney Diseases



National Eye Institute



National Heart, Lung, and Blood Institute



National Human Genome Research



National Institute of Allergy and Infectious Diseases



National Institute of Mental Health



National Institute of Neurological Disorders and Stroke



National Institute of Nursing Research

Recruitment Detail
Identifies both subject accrual type and the gender of the subjects participating in the clinical study. Subject accrual types include "Active Accrual of New Subjects" and "Follow-Up of Previously Enrolled Subjects Only."

Referral Letter Required
Identifies if participation in a protocol must be through a physician or if the protocols permits self-refer.

Population Exclusions
The subject population omitted from enrollment in a clinical research study for scientific reasons.

Eligibility Criteria
Identifies specific inclusion and exclusion criteria for subject enrollment in the clinical research study.

Special Instructions
dentifies information the Principal Investigator feels is pertinent for the patient to know when considering participating in the research study.

Disease Category
NIH clinical studies are grouped according to the International Classification of Diseases (ICD-9) disease categories.

Primary words, phrases, or acronyms, excluded from those found in the title that describe the study and are included in the search criteria to retrieve a protocol.

Recruitment Keywords
Primary words, phrases, or acronyms, identified by the Patient Recruitment and Public Liaison Office, used to identify protocols for possible patient participation.

Investigational Drug(s)
Identifies if the clinical research study involves an investigational drug.

Investigational Devices(s)
Identifies if the clinical research study involves an investigational device.

Principal Investigator
Information about the principal investigator includes the name and address of the person responsible for the coordination and conduct of the specific clinical study.

Source of reference for additional information pertaining to the clinical research study.

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Medical Information
It is not the intention of NIH to provide specific medical advice, but rather to provide users with information to better understand their health and their diagnosed disorders. Specific medical advice will not be provided, and NIH urges you to consult with a qualified physician for diagnosis and for answers to your personal questions.

E-mailed inquiries/requests
Email sent to the National Institutes of Health Clinical Center may be forwarded to appropriate NIH or outside experts for response. We do not collect your name and e-mail address for any purpose other than to respond to your query. Nevertheless, email is not necessarily secure against interception. If your communication contains sensitive or personal information, you may want to send it by postal mail. This statement applies to the NIH Clinical Center Clinical Studies website. Inquiries may be mailed to the addresses above.

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Contact the Patient Recruitment and Public Liaison Office for:

  • Details on how to participate in a study
  • Details on how to refer a patient to a study

NIH Clinical Studies Information Request

Contact the Office of Communications for:

  • General information about the NIH Clinical Center

Contact the Department Clinical Research Informatics, (DCRI) for:

  • Technical questions about Adobe Acrobat and the PDF format
  • Technical questions about this web server