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Related Concept Videos

Randomized Experiments01:13

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
Simple...
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...
Blinding01:11

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.
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...
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...
Hazard Ratio01:12

Hazard Ratio

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 evaluating a...

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Related Experiment Video

Updated: Jul 5, 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

The revised CONSORT statement for reporting randomized trials: explanation and elaboration.

D G Altman1, K F Schulz, D Moher

  • 1ICRF Medical Statistics Group, Centre for Statistics in Medicine, Institute of Health Sciences, Old Road, Headington, Oxford OX3 7LF, United Kingdom.

Annals of Internal Medicine
|April 17, 2001
PubMed
Summary
This summary is machine-generated.

Poor reporting quality in randomized controlled trials (RCTs) can bias results. The CONSORT statement provides a checklist and flow diagram to improve RCT reporting and scientific integrity.

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Area of Science:

  • Clinical Trials Methodology
  • Scientific Reporting Standards
  • Evidence-Based Medicine

Background:

  • Inadequate reporting and design of randomized controlled trials (RCTs) are linked to biased treatment effect estimates.
  • Systematic errors in RCTs undermine their core principle of eliminating bias and indicate poor scientific practice.
  • Poor scientific quality in RCTs raises ethical concerns regarding patient welfare and research integrity.

Framework:

  • The CONSORT (Consolidated Standards of Reporting Trials) statement was developed by scientists and editors to enhance RCT reporting quality.
  • CONSORT provides a standardized checklist and flow diagram to guide authors in reporting their trials.
  • This framework aims to improve the clarity, completeness, and transparency of RCT publications.

Implementation:

  • Numerous leading medical journals and international editorial groups have adopted the CONSORT statement.
  • The CONSORT statement serves as a crucial tool for authors to improve the reporting of their research.
  • This explanatory document elaborates on each checklist item, offering rationales and examples of good reporting.

Implications:

  • Adoption of CONSORT improves the critical appraisal and interpretation of RCTs by healthcare professionals and researchers.
  • Enhanced reporting through CONSORT contributes to more reliable and trustworthy scientific evidence.
  • The CONSORT statement, its supporting documents, and online resources facilitate better understanding and dissemination of best practices in clinical trial reporting.