STAT 509 - Lesson 2: Overview of Clinical Trials Vocabulary

A comprehensive vocabulary set covering the role of statistics, ethical principles (Nuremberg, Helsinki, Belmont), regulatory requirements (IRB, Informed Consent), and trial design concepts from STAT 509 Lesson 2.

Clinical research

Research that investigates proposed medical treatments, assesses relative benefits of competing therapies, and establishes optimal treatment combinations.

Empirical knowledge

Knowledge generated from observations and data.

Medical theory

Theory based on established biology and biological hypotheses.

Statistical theory

Theory derived from mathematical and probabilistic models.

Experiment

A series of observations made under conditions controlled by the scientist.

Clinical trial

An experiment testing medical treatments on human subjects, distinguished by its experimental nature and its occurrence in humans.

Confirmatory trial

A trial used to confirm findings from earlier studies, particularly when results are surprising or contradict biological theory.

Replicative or extension study

A repeat study that may confirm an earlier result, or a new trial testing whether a therapy works in a different population.

Prevention trial

A trial in healthy subjects to determine whether an intervention prevents disease onset; often cumbersome, lengthy, and expensive.

Window of opportunity

The period when a trial is most feasible and likely to influence practice, often relatively early in a new therapy's development.

Investigator objectivity

A crucial component of ethical medical research where investigators remain objective in design, conduct, analysis, and reporting.

Nuremberg Code

International directives for ethical human experimentation adopted in 1947, consisting of 10 principles including voluntary consent and avoidance of unnecessary suffering.

Declaration of Helsinki

A World Medical Association code of ethics for physicians conducting clinical research, first adopted in 1964, emphasizing the protection of life, health, and human dignity.

Tuskegee Syphilis Study

A U.S. Public Health Service study of untreated syphilis in Alabama that continued after penicillin became an effective cure, ending in the early 1970s after public exposure.

National Research Act of 1974

U.S. congressional response to research abuses that established the National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research.

Belmont Report

A 1979 report that distilled ethical guidelines for human-subject research into three principles: respect for persons, beneficence, and justice.

Respect for persons / individual autonomy

The ethical principle that people have the right to make decisions about what is done to them, requiring that participants be informed of risks and alternatives.

Beneficence

The patient's right to favorable treatment and the investigator's obligation to balance risks to current participants against benefits to future patients.

Justice

The ethical principle requiring a fair distribution of the benefits and burdens of research.

Institutional Review Board (IRB)

A mechanism established to protect human participants in research, mandated for FDA-regulated products and federally funded research.

Common Rule

The Federal Policy for the Protection of Human Subjects; core DHHS regulations in 45 CFR Part 46, Subpart A adopted by many U.S. agencies.

Informed consent

A process and documentation reflecting respect for persons where participants are informed about risks, benefits, and voluntariness before participation.

Equipoise

Genuine collective uncertainty about which available therapy is best; the condition required to justify randomizing a patient to treatment.

Placebo

An inactive facsimile of active therapy used so participants may not know whether the active ingredient is present, helping to clarify the treatment effect.

Active control

An accepted effective standard therapy used as the comparison treatment when withholding effective treatment would be unethical.

HIPAA Privacy Rule

U.S. federal standards protecting the privacy of individually identifiable personal health information (PHI), with an effective date of April 14, 2003.

Interim statistical analysis

A planned analysis performed before trial completion to periodically assess treatment superiority while preserving the trial's statistical integrity.

Publication bias

Bias caused when journals or the scientific literature disproportionately favor studies with statistically significant results.

Ghost authorship

Deceptive authorship in which actual writers are not disclosed or listed authors did not genuinely participate in the research.