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Related Concept Videos

Clinical Trials01:16

Clinical Trials

Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
Clinical Trials: Overview01:11

Clinical Trials: Overview

Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
Preclinical Development: Overview01:28

Preclinical Development: Overview

Preclinical development consists of a series of tests that ensure the safety and efficacy of a new therapeutic compound before it is tested in humans. There are four main phases to this process. First, safety pharmacology tests are conducted to ensure the drug does not produce any acutely harmful effects. These tests examine parameters such as bronchoconstriction, cardiac dysrhythmias, blood pressure changes, and ataxia. Next, preliminary toxicological testing is performed to determine the...
Drug Administration and Therapy Phases: Overview01:26

Drug Administration and Therapy Phases: Overview

Drugs, the chemical agents used in diagnosing, treating, or preventing diseases, undergo a four-phase process of development: pharmaceutic, pharmacokinetics, pharmacodynamics, and therapeutic.
The pharmaceutical phase focuses on leveraging the physicochemical properties of the drug to design and manufacture an effective product. Variants include orally administered tablets or capsules, topical creams or ointments, and parenteral-delivery solutions or emulsions.
The pharmacokinetic phase...
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast, controlled...
Pharmaceutical Alternatives: Stability-Related Therapeutic Nonequivalence01:22

Pharmaceutical Alternatives: Stability-Related Therapeutic Nonequivalence

Generic intravenous (IV) drugs are considered bioequivalent to their branded counterparts due to their 100% bioavailability upon administration. However, variations in stability among different drug products can significantly influence their therapeutic performance, even if they are pharmaceutically equivalent.Cefuroxime, a prophylactic antimicrobial, is often used as a single-dose IV injection for patients undergoing coronary artery bypass grafting surgery. A 3 g dose typically provides...

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Related Experiment Video

Updated: May 21, 2026

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
04:53

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition

Published on: September 20, 2019

Current development in clinical trials: issues old and new.

David L DeMets1

  • 1Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, WI, U.S.A. demets@biostat.wisc.edu

Statistics in Medicine
|June 28, 2012
PubMed
Summary
This summary is machine-generated.

Clinical trials are crucial for evaluating new medical interventions but face ongoing design and analysis challenges. Emerging issues in genomics and proteomics require innovative solutions for robust clinical trial conduct.

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Area of Science:

  • Clinical Trials and Biostatistics
  • Genomics and Proteomics
  • Medical Intervention Evaluation

Background:

  • Randomized clinical trials (RCTs) are the gold standard for assessing new medical interventions.
  • Despite decades of experience, significant challenges persist in clinical trial design, conduct, monitoring, and analysis.
  • Advancements in genomics and proteomics introduce new complexities to trial methodologies.

Purpose of the Study:

  • To highlight persistent and emerging challenges in clinical trial design and conduct.
  • To discuss statistical and logistical issues impacting trial evaluation.
  • To address specific challenges including subject withdrawal, adaptive and noninferiority designs, surrogate markers, gene transfer studies, and comparative effectiveness research.

Main Methods:

  • Review of established and evolving challenges in clinical trial methodology.
  • Discussion of statistical and logistical considerations in trial design and analysis.
  • Examination of issues related to subject follow-up, novel designs, and specific study types like gene transfer and comparative effectiveness studies.

Main Results:

  • Clinical trials face enduring and new challenges, influenced by scientific progress.
  • Issues span statistical, logistical, and ethical domains, affecting trial integrity.
  • Specific concerns include managing subject withdrawal, implementing advanced designs, and analyzing complex data from gene transfer and comparative effectiveness studies.

Conclusions:

  • Addressing the multifaceted challenges in clinical trials is essential for reliable evaluation of medical interventions.
  • Adaptation of trial designs and analytical methods is necessary to incorporate advancements in genomics and proteomics.
  • Continued research and methodological innovation are required to overcome existing and emerging obstacles in clinical trial conduct.