Terms starting with F

Factorial Assignment

Factorial assignment is a type of clinical study in which groups of participants receive one of several combinations of interventions. For example, two-by-two factorial assignment involves four groups of participants. Each group receives one of the following pairs of interventions: (1) medicine A and medicine B, (2) medicine A and a placebo, (3) a placebo and medicine B, or (4) a placebo and a placebo. Therefore, during the clinical study, the different groups of participants receive all possible combinations of the two medicines (A and B) and the placebos. (CTG)

Fees for Participation

Fees for participation refer to when clinical study organizers provide some form of compensation to participants. This may take the form of money, or the reimbursement of travel expenses, food, food vouchers, or other services.


Findings are the results of a clinical study after the information obtained from the study is analyzed.

First Posted

"First posted" is the date on which the study record was first available on ClinicalTrials.gov. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date. (CTG) "

First Submitted

"First submitted" is the date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date). (CTG) "

First Submitted that Met quality control (QC) Criteria

"First submitted that met quality control (QC) criteria" is the date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) QC review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria. (CTG) "

First-in-Humans Study

First-in-human studies administer an experimental medicine or treatment to a small group of people (20–80) for the first time. The purpose is to evaluate its safety and identify side effects. (NIH)

Food and Drug Administration (FDA)

The Food and Drug Administration is an agency within the U.S. Department of Health and Human Services responsible for protecting the public health by assuring the safety, efficacy, and security of human and veterinary medicines, biological products, medical devices, nation’s food supply, cosmetics, and products that emit radiation. (NIH)

Full Physical Exam Assessment

A full physical exam assessment is a comprehensive assessment that gauges a clinical study participant's entire physical health status. It is often used to establish a baseline at the beginning of a clinical study.

Funder Type

Funder type describes the organization that provides funding or support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting. Organizations listed as sponsors and collaborators for a study are considered the funders of the study. ClinicalTrials.gov refers to four types of funders: 1) U.S. National Institutes of Health, 2) Other U.S. Federal agencies (for example, Food and Drug Administration, Centers for Disease Control and Prevention, or U.S. Department of Veterans Affairs), 3) Industry (for example: pharmaceutical and device companies), 4) All others (including individuals, universities, and community-based organizations). (CTG)