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Clinical Trials: Overview01:11

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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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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.
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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...
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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.
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Post-marketing surveillance is a critical component of pharmaceutical regulation, often uncovering unanticipated adverse drug reactions (ADRs) once a drug is widely used over an extended period.
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Updated: Sep 27, 2025

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
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Data flow within global clinical trials: a scoping review.

Kaitlyn Kwok1, Neha Sati2, Louis Dron2

  • 1Faculty of Medicine, The University of British Columbia, Vancouver, British Columbia, Canada.

BMJ Global Health
|April 12, 2022
PubMed
Summary

Global clinical trials predominantly show data flow from the Global South to the Global North for analysis. This highlights an inequitable data sharing model that requires policy re-evaluation for better global health equity.

Keywords:
Clinical trialEpidemiologyRandomised control trialReview

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Area of Science:

  • Global Health
  • Clinical Trials
  • Health Economics

Background:

  • Global clinical trials are crucial for advancing medical knowledge and treatments.
  • Understanding data flow in international research is essential for equitable scientific contribution.
  • Existing research highlights disparities in global health research participation and outcomes.

Purpose of the Study:

  • To document the direction of clinical trial data flow in major global publications from 2013 to 2021.
  • To analyze data movement from the Global South to the Global North in international research collaborations.
  • To identify patterns of data sharing and author affiliations across different country income groups.

Main Methods:

  • A scoping analysis was conducted on randomized clinical trials published in leading medical journals (2013-2021).
  • Studies involving author affiliations and recruitment across different World Bank-defined income groupings were included.
  • Data flow was tracked from trial recruitment sites to the location of statistical analysis.

Main Results:

  • Out of 305 included studies, 82% of trials recruiting across income groups were solely funded by high-income countries.
  • In 73.4% of assessable studies, data flowed exclusively or predominantly to high-income country authors for statistical analysis.
  • A minimal number of studies (3.2%) showed data flow to lower-middle and upper-middle-income countries for analysis.

Conclusions:

  • Global clinical trial data predominantly flows from the Global South to the Global North.
  • Current data sharing practices in global clinical trials may perpetuate inequities.
  • Policies governing data sharing need re-examination to foster a more equitable global research landscape.