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Related Concept Videos

Clinical Trials01:16

Clinical Trials

8.5K
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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Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

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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.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
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Bioavailability Study Design: Healthy Subjects Versus Patients01:15

Bioavailability Study Design: Healthy Subjects Versus Patients

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Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...
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Blinding01:11

Blinding

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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.
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Blind Procedures02:07

Blind Procedures

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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...
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Related Experiment Video

Updated: May 2, 2026

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
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Assessing usual care in clinical trials.

Judith A Erlen1, Lisa K Tamres2, Nancy Reynolds3

  • 1University of Pittsburgh, PA, USA jae001@pitt.edu.

Western Journal of Nursing Research
|March 14, 2014
PubMed
Summary

Clinical trials often assume consistent usual care for controls, but this assumption is frequently unmet. Systematic assessment and reporting of usual care are crucial for accurate clinical trial interpretation.

Keywords:
HIVadherencecontrol conditioninterventionusual care

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Area of Science:

  • Clinical Trials
  • HIV/AIDS Research
  • Public Health

Background:

  • Clinical trials often use usual care as a control condition, assuming uniform participant experience.
  • This assumption may be flawed, potentially impacting study outcomes and interpretation.

Purpose of the Study:

  • To describe the assessment of usual care in the Multisite Adherence Collaboration in HIV (MACH 14) studies.
  • To evaluate the consistency and comprehensiveness of usual care assessments in HIV adherence trials.

Main Methods:

  • Review of usual care assessment protocols across 16 studies within the MACH 14 collaboration.
  • Analysis of the timing, frequency, and content of usual care assessments.

Main Results:

  • Only five of the 16 MACH 14 studies formally assessed usual care.
  • Significant variability existed in assessment protocols, timing, and frequency.
  • All assessed usual care focused on patient education regarding HIV, medications, and adherence.

Conclusions:

  • The assessment of usual care in HIV adherence clinical trials is often inconsistent and lacks systematic evaluation.
  • There is a need for standardized methods to assess and report usual care in clinical trial designs.
  • Understanding usual care's influence is vital for interpreting experimental treatment effects in HIV therapy trials.