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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...
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.
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...
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...
Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs01:20

Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs

Bioequivalence experimental study designs are crucial methodologies used in evaluating and comparing the bioavailability of different drug products. These designs are categorized into various types: completely randomized, randomized block, repeated measures, cross and carry-over, and Latin square designs.Completely randomized designs involve randomly allocating treatments to all subjects participating in the experiment. This allocation is achieved by assigning unique random numbers to subjects...
Blind Procedures02:07

Blind Procedures

Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...

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Related Experiment Video

Updated: Jun 19, 2026

The Adjuvant Efficacy of Angong Niuhuang Pill in the Treatment of Viral Encephalitis: A Meta-Analysis of Randomized Controlled Trials
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The Adjuvant Efficacy of Angong Niuhuang Pill in the Treatment of Viral Encephalitis: A Meta-Analysis of Randomized Controlled Trials

Published on: April 19, 2024

Critically appraising randomised trials.

Derek Richards1

  • 1Centre for Evidence-based Dentistry, Oxford.

Evidence-Based Dentistry
|October 13, 2009
PubMed
Summary
This summary is machine-generated.

Critical appraisal is a core skill for evidence-based practice, essential for evaluating research. This guide explains how to critically appraise randomised controlled trials (RCTs) for dental professionals.

Related Experiment Videos

Last Updated: Jun 19, 2026

The Adjuvant Efficacy of Angong Niuhuang Pill in the Treatment of Viral Encephalitis: A Meta-Analysis of Randomized Controlled Trials
08:36

The Adjuvant Efficacy of Angong Niuhuang Pill in the Treatment of Viral Encephalitis: A Meta-Analysis of Randomized Controlled Trials

Published on: April 19, 2024

Area of Science:

  • Dental Education
  • Evidence-Based Dentistry
  • Research Methodology

Background:

  • Critical appraisal is fundamental to evidence-based practice.
  • The teaching of critical appraisal skills is increasing in dental schools.
  • Understanding research methodology is crucial for clinicians.

Purpose of the Study:

  • To outline the key principles for appraising randomised controlled trials (RCTs).
  • To provide a foundational guide for dental professionals on evaluating research.
  • To enhance the application of evidence-based dentistry in clinical practice.

Main Methods:

  • The article focuses on the principles of critical appraisal.
  • It specifically addresses the evaluation of randomised controlled trials (RCTs).
  • Key concepts and criteria for assessing RCT validity are discussed.

Main Results:

  • The principles for appraising randomised controlled trials (RCTs) are presented.
  • Guidance is provided on assessing the methodological rigor of RCTs.
  • The importance of critical appraisal for informed clinical decision-making is highlighted.

Conclusions:

  • Mastering critical appraisal of RCTs is vital for evidence-based dental practice.
  • Dental schools are increasingly incorporating critical appraisal training.
  • Effective appraisal skills empower dentists to utilize the best available evidence.