Detailed STAT 509 Lesson 2 - Overview of Clinical Trials

A complete set of vocabulary flashcards for STAT 509 Lesson 2, covering clinical trial definitions, historical ethics, IRB requirements, and statistical professionalism.

Lesson 2 Purpose

Provides an overview of clinical trials as research and the ethical obligations governing their design, conduct, and reporting.

Clinical research

Investigates proposed medical treatments, assesses 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.

Statistical reasoning characteristic 1

Establish an objective framework for conducting an investigation.

Statistical reasoning characteristic 2

Place data and theory on an equal scientific footing.

Statistical reasoning characteristic 3

Design data production through experimentation.

Statistical reasoning characteristic 4

Quantify the influence of chance.

Statistical reasoning characteristic 5

Estimate systematic and random effects.

Statistical reasoning characteristic 6

Combine theory and data using formal methods.

Experiment

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

Clinical trial

An experiment testing medical interventions on human subjects.

Design

The process or structure used to isolate the factors of interest.

Confirmatory trial

A trial used to confirm findings from earlier studies, especially when results contradict biological theory.

Prevention trial

A trial in healthy subjects to determine whether an intervention prevents disease onset.

Window of opportunity

The period, often early in development, when a trial is most feasible and likely to influence practice.

Non-experimental comparative evidence requirement 1

The treatment of interest must occur naturally.

Non-experimental comparative evidence requirement 2

Study subjects must provide valid observations for the biological question.

Non-experimental comparative evidence requirement 3

The natural history of the disease under standard therapy or without therapy must be known.

Non-experimental comparative evidence requirement 4

The treatment effect must be large enough to overshadow random error and bias.

Non-experimental comparative evidence requirement 5

Evidence of efficacy must be consistent with biological knowledge.

Physician-patient ethical tension

Conflict between the healer's duty to the individual and the investigator's duty to generate scientific knowledge.

AMA research obligation

Professional duty for physicians to continue studying and advancing scientific knowledge.

Responsible Conduct of Research training

Instruction in ethics, integrity, peer review, and conflicts of interest required by agencies like the NIH or NSF.

Financial conflict-of-interest reporting

PHS requirement to report significant financial interests that could affect research design or conduct.

Technical competence

The requirement that investigators be qualified through education, certification, and experience.

Humanistic competence

The requirement that investigators demonstrate compassion and empathy.

Nuremberg Trials

$1946-1947$ trials exposing atrocities by Nazi physicians under the guise of experimentation.

Nuremberg Code

International directives for ethical human experimentation adopted in $1947$.

Nuremberg Code principle 1

Voluntary consent of the human subject is essential.

Nuremberg Code principle 2

There must be no reasonable alternative to conducting the experiment.

Nuremberg Code principle 3

Anticipated results must have a basis in biological knowledge and animal experimentation.

Nuremberg Code principle 4

Procedures should avoid unnecessary physical and mental suffering and injury.

Nuremberg Code principle 5

There should be no expectation of death or disability as a result of the trial.

Nuremberg Code principle 6

The degree of patient risk should not exceed the humanitarian importance of the problem.

Nuremberg Code principle 7

Subjects should be protected against even a remote possibility of death or injury.

Nuremberg Code principle 8

The study must be conducted by qualified scientists with a high degree of skill and care.

Nuremberg Code principle 9

The subject may stop participation at will.

Nuremberg Code principle 10

The investigator must terminate the experiment if injury, disability, or death appears likely.

Declaration of Helsinki

A World Medical Association code of ethics for physicians conducting research, first adopted in $1964$.

Independent ethical review (Helsinki)

The requirement that research protocols be reviewed by a committee distinct from the investigator.

Tuskegee Syphilis Study

A U.S. PHS study of untreated syphilis that continued for decades even after penicillin became an effective cure.

National Research Act of 1974

U.S. congressional response to research abuses that established a commission for the protection of human subjects.

Belmont Report

A $1979$ report distilling ethical guidelines into respect for persons, beneficence, and justice.

Respect for persons

Ethical principle emphasizing individual autonomy and the right to make informed decisions.

Beneficence

The investigator's obligation to maximize help and minimize harm through risk-benefit assessment.

Justice

Fair distribution of the benefits and burdens of research across populations.

Institutional Review Board (IRB)

A mechanism/committee established to protect human participants in research.

Common Rule

The Federal Policy for the Protection of Human Subjects, including core DHHS regulations in $45\,CFR\,Part\,46$.

IRB approval prerequisite 1

Risks to study participants are minimized.

IRB approval prerequisite 2

Risks are reasonable in relation to anticipated benefits.

IRB approval prerequisite 3

Selection of study participants is equitable.

IRB approval prerequisite 4

Informed consent is obtained and appropriately documented for each participant.

IRB approval prerequisite 5

Adequate provisions exist to monitor collected data and ensure participant safety.

IRB approval prerequisite 6

Participant privacy and data confidentiality are protected.

Informed consent

A process and documentation reflecting respect for persons, ensuring participation is voluntary.

Required informed-consent element 1

The research nature of the study.

Required informed-consent element 2

Reasonably foreseeable risks and discomforts.

Required informed-consent element 3

Potential benefits and alternatives.

Required informed-consent element 4

Procedures for maintaining privacy.

Required informed-consent element 5

Treatment for injuries incurred.

Required informed-consent element 6

Individuals to contact with questions.

Required informed-consent element 7

The voluntary nature of participation and the ability to withdraw at any time.

Required informed-consent element 8

Choosing not to enter the study does not cause loss of benefits.

Unanswerable design

A study design incapable of answering the biological question, which is considered unethical.

Equipoise

Genuine collective uncertainty about which available therapy is best, justifying randomization.

Placebo

An inactive facsimile of active therapy used to control for the process of receiving treatment.

Unethical placebo use

Using an inactive control when a disease is life-threatening and an effective therapy exists.

Active control

An accepted effective standard therapy used as a comparison treatment.

Add-on placebo design

A design where all subjects receive standard therapy and are randomized to either a new treatment or a placebo.

HIPAA Privacy Rule

U.S. federal standards protecting identifiable health information, with an effective date of April $14$, $2003$.

Protected Health Information (PHI)

Individually identifiable health information protected under HIPAA standards.

Interim statistical analysis

A planned analysis performed before trial completion to periodically assess treatment superiority.

Independent monitoring board

A group of scientists (e.g., DSMB) who monitor results and decide if a trial should continue.

Data integrity

The requirement that research data must be accurate, honest, and free of falsification.

Trial registration

Entering trial information in a public database to reduce selective nonpublication.

Publication bias

Distorted literature caused by favoring studies with statistically significant results over those without.

Ghost authorship

Deceptive authorship where actual writers are not disclosed or listed authors did not participate.

Professional competence (Statistician)

Maintaining current knowledge and field developments to provide expert service.

Human rights (Statistician)

The constant regard for human rights during the practice of statistics.

Honest and objective reporting

The ethical requirement for statisticians to present findings without deception.

Disclosure of interests

Revealing financial or professional ties that could affect or appear to affect statements.

Statistical ethics - data collection 1

Collect only data needed for the purposes of the inquiry.

Statistical ethics - data collection 2

Inform participants about the nature, sponsorship, and intended uses of their data.

Statistical ethics - data collection 3

Establish the sponsor's intentions and ability to protect confidentiality.

Statistical ethics - data collection 4

Inform participants about the strengths and limitations of confidentiality protections.

Statistical ethics - data collection 5

Process data according to intentions and remove identifying information.

Statistical ethics - data collection 6

Maintain confidentiality when data are transferred to other people or organizations.

Statistical ethics - sponsors/clients 1

Clarify qualifications to undertake the inquiry.

Statistical ethics - sponsors/clients 2

Reveal factors that may conflict with impartiality.

Statistical ethics - sponsors/clients 3

Accept no contingency-fee arrangements.

Statistical ethics - sponsors/clients 4

Apply statistical methods without regard for a desired outcome.

Statistical ethics - sponsors/clients 5

Outline alternative statistical methods along with the selected methods.

Statistical ethics - sponsors/clients 6

Maintain confidentiality concerning other sponsors or clients.

Multi-center trial burden

A trial conducted across many institutions that can cost hundreds of millions of dollars.

Role of statistics

Provides a formal way to account for variability, quantify chance, and estimate systematic effects.

Randomization requirement

The presence of equipoise regarding available treatments.

Reporting urgency

The duty for investigators to share trial results fully and without unnecessary delay.

Subject selection ethics

Determining if a population can answer a question while ensuring risks are proportionate and selection is just.