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Clinical Trials

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.
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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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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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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...

Blinding

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.

Randomized Experiments

Randomized Experiments

The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
Simple randomization
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A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition

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International Collaboration and Commercial Involvement in Randomized Controlled Trials From 10 Leading Countries,

Shunichi Fukuhara^1,2,3, Yuki Kataoka^1,4, Takuya Aoki^1,5

¹Section of Clinical Epidemiology, Department of Community Medicine, Graduate School of Medicine, Kyoto University, Kyoto, JPN.

|June 28, 2024

Summary

This summary is machine-generated.

The number of randomized controlled trials (RCTs) has increased, but many are published outside high-impact clinical journals. International collaboration and commercial involvement in RCTs have risen, particularly in Japan, raising concerns about potential bias.

Keywords:

commercial involvement core clinical journals international collaboration medical publication randomized controlled trials

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Area of Science:

Clinical Research
Medical Informatics
Publication Trends

Background:

Randomized controlled trials (RCTs) are crucial for clinical decision-making, with their numbers rapidly increasing.
Understanding trends in international collaboration and commercial involvement in RCTs is essential to identify potential biases.

Purpose of the Study:

To quantify changes in the number of RCT articles in high-impact clinical journals.
To analyze trends in international collaboration among top contributing countries.
To assess the extent of commercial involvement in RCTs over two decades.

Main Methods:

Descriptive study analyzing RCT articles from MEDLINE (1997-2019).
Focus on the 10 leading countries in natural sciences (Nature Index 2019).
Identification of high-impact journals using the Core Clinical Journals (CCJ) filter; defined international collaboration and commercial involvement by author affiliations.

Main Results:

Total RCT articles doubled, but those in CCJ remained stable, suggesting lower clinical relevance for newer studies.
International collaboration increased in most top countries, except China.
Commercial involvement in single-country RCTs decreased, but increased significantly in international collaborative RCTs, especially in Japan (12-fold increase).

Conclusions:

The surge in RCTs is largely occurring outside core clinical journals, potentially impacting clinical relevance.
Increased international collaboration is a general trend, but commercial involvement, particularly in Japan, has risen substantially.
The growing commercial involvement in RCTs necessitates monitoring for potential sponsorship bias and evaluating mitigation strategies.