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Related Concept Videos

Clinical Trials01:16

Clinical Trials

6.7K
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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Experimental Designs01:16

Experimental Designs

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An experimental design is a systematic process that allows researchers to evaluate the relationship between dependent and independent variables. There are three widely used types of experimental design - pre-experimental design, true experimental design, and quasi-experimental design. In pre-experimental design, the researcher compares the data before and after some interventions or treatments. The true-experimental design has more than one purposefully created group, a commonly measured...
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Group Design02:01

Group Design

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The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between...
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Cochran's Q Test01:17

Cochran's Q Test

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Cochran's Q Test is a nonparametric statistical test used to determine if there are potential differences in the outcomes of three or more related groups on a binary (yes/no) or dichotomous outcome. It is essentially an extension of the McNemar Test, which is limited to two related samples - Cochran's Q test can handle three or more related samples, making it more versatile in scenarios where subjects are measured under multiple conditions. The test statistic follows a Chi-Square...
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Crossover Experiments01:16

Crossover Experiments

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Crossover experiments, also called the repeated-measurements design, is a study design in which all experimental units are exposed to all treatments in different periods. Crossover experiments are generally used in psychology, the pharmaceutical industry, agriculture, and medicine.
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
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The Participant-Reported Implementation Update and Score PRIUS: A Novel Method for Capturing Implementation-Related Data Over Time
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Similarities and Differences Between Pragmatic Trials and Hybrid Effectiveness-Implementation Trials.

John C Fortney1,2, Geoffrey M Curran3,4, Aaron R Lyon5

  • 1Department of Psychiatry and Behavioral Sciences, School of Medicine, University of Washington, Seattle, WA, USA. fortneyj@uw.edu.

Journal of General Internal Medicine
|April 16, 2024
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Summary

Pragmatic trials enhance generalizability, while hybrid trials speed up evidence adoption. Understanding their distinct features is crucial for accurate research and policy decisions.

Keywords:
FidelityHybrid Effectiveness-Implementation TrialsImplementation TrialsPragmatic TrialsTrial Design

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Area of Science:

  • Clinical Trials Methodology
  • Implementation Science
  • Health Services Research

Background:

  • Pragmatic trials aim to increase the generalizability of research findings to routine clinical care.
  • Hybrid trials assess both clinical effectiveness and implementation success to accelerate evidence-based practice adoption.
  • Both methodologies share design features, leading to potential confusion and misclassification.

Purpose of the Study:

  • To clarify the similarities and differences between Pragmatic Trials and Hybrid Effectiveness-Implementation Trials.
  • To guide funders, researchers, and policymakers in distinguishing these trial types.
  • To assist investigators in selecting, labeling, and operationalizing the correct trial design.

Main Methods:

  • Comparative analysis of Pragmatic Trials and Hybrid Effectiveness-Implementation Trials.
  • Discussion of shared design features and key distinctions.
  • Development of recommendations for trial selection and operationalization.

Main Results:

  • Pragmatic Trials and Hybrid Effectiveness-Implementation Trials, despite shared features, address different research questions.
  • Blurred boundaries can hinder grant evaluation, scientific interpretation, and policy development.
  • Most trials are not purely one type but possess characteristics of both.

Conclusions:

  • Clear differentiation between Pragmatic Trials and Hybrid Effectiveness-Implementation Trials is essential.
  • Recommendations are provided to aid investigators in choosing the appropriate trial type.
  • These guidelines complement existing reporting standards like TIDieR and StaRI.