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Related Concept Videos

Clinical Trials01:16

Clinical Trials

11.0K
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...
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Clinical Trials: Overview01:11

Clinical Trials: Overview

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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...
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Hazard Ratio01:12

Hazard Ratio

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The hazard ratio (HR) is a widely used measure in clinical trials to compare the risk of events, such as death or disease recurrence, between two groups over time. It reflects the ratio of hazard rates—the instantaneous risk of the event occurring—between a treatment group and a control group. This measure provides valuable insights into the relative effectiveness of a treatment by assessing how the risk of an event differs between the two groups.
For example, in a clinical trial...
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Data Collection by Experiments01:13

Data Collection by Experiments

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Data collection is a systematic method of obtaining, observing, measuring, and analyzing accurate information. An experimental study is a standard method of data collection that involves the manipulation of the samples by applying some form of treatment prior to data collection. It refers to manipulating one variable to determine its changes on another variable. The sample subjected to treatment is known as “experimental units.”
An example of the experimental method is a public...
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Bioavailability Study Design: Healthy Subjects Versus Patients01:15

Bioavailability Study Design: Healthy Subjects Versus Patients

198
Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...
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Bioequivalence studies: Biowaivers01:13

Bioequivalence studies: Biowaivers

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In certain scenarios, in vitro dissolution tests can replace in vivo bioequivalence studies. This is particularly true when a drug product, though available in varying strengths, maintains proportional similarity in its active and inactive ingredients. In such cases, the need for in vivo bioequivalence studies for lower strength variants may be waived, provided dissolution tests and in vivo studies on the highest strength yield satisfactory results.Bioequivalence can be indicated through...
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Updated: Mar 12, 2026

In Silico Clinical Trials for Cardiovascular Disease
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'PACE-Gate': When clinical trial evidence meets open data access.

Keith J Geraghty1

  • 1The University of Manchester, UK.

Journal of Health Psychology
|November 4, 2016
PubMed
Summary
This summary is machine-generated.

The PACE trial for chronic fatigue syndrome faced controversy. Patients alleged overstated treatment effectiveness for cognitive behavioural therapy and graded exercise therapy after data release revealed lower efficacy.

Keywords:
chronic fatigue syndromeclinical trialscognitive behavioural therapypsychotherapytreatment

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Area of Science:

  • Clinical Trials
  • Medical Research Methodology
  • Patient Advocacy

Background:

  • The PACE trial investigated treatments for chronic fatigue syndrome (CFS), a condition characterized by profound fatigue.
  • Controversy arose regarding the trial's methodology and reported outcomes, particularly concerning cognitive behavioural therapy (CBT) and graded exercise therapy (GET).

Purpose of the Study:

  • To address patient concerns and investigate allegations of overstated treatment efficacy in the PACE trial.
  • To examine the impact of data access, via a freedom of information request, on understanding trial results.

Main Methods:

  • Analysis of data from the PACE trial, following its release.
  • Review of patient claims regarding the lowering of improvement thresholds.

Main Results:

  • Patient access to PACE trial data revealed significantly lower efficacy for CBT and GET than initially reported.
  • Allegations of overstated treatment effectiveness were substantiated by the released data.

Conclusions:

  • The PACE trial's reported outcomes may not accurately reflect the true effectiveness of CBT and GET for chronic fatigue syndrome.
  • Transparency and data accessibility are crucial for validating clinical trial results and maintaining public trust.