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Related Concept Videos

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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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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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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Related Experiment Video

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Using Continuous Data Tracking Technology to Study Exercise Adherence in Pulmonary Rehabilitation
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Adherence reporting in randomized controlled trials.

Ze Zhang1, Michael J Peluso, Cary P Gross

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Treatment adherence is often underreported in randomized controlled trials (RCTs). When reported, adherence measurement methods and results vary significantly, impacting the interpretation of study quality and findings.

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Area of Science:

  • Clinical Research
  • Pharmacotherapy
  • Evidence-Based Medicine

Background:

  • Treatment adherence significantly influences observed therapeutic effects in randomized controlled trials (RCTs).
  • Adherence also serves as an indicator of research quality and participant treatment acceptance.
  • Current practices for measuring and reporting adherence in RCTs are not well understood.

Purpose of the Study:

  • To determine and evaluate the practices for measuring and reporting treatment adherence in RCTs.
  • Focus on RCTs involving oral pharmacologic interventions published in high-impact factor journals.

Main Methods:

  • Systematic review of RCTs involving oral pharmacotherapy published in 2010.
  • Data abstraction by two independent investigators on trial characteristics, adherence monitoring, and reporting.
  • Statistical analysis including chi-square and Spearman's rank correlation.

Main Results:

  • Only 45.9% of 111 included RCTs reported adherence.
  • Studies reporting adherence were more likely to report negative findings (p=0.032).
  • Pill count-back was the most common monitoring method; median adherence was 88.4%.
  • Longer follow-up was associated with lower adherence (r=-0.45, p=0.0015).
  • Few studies adequately accounted for lost participants or medication discontinuation.

Conclusions:

  • Adherence measurement and reporting are significantly underreported in published RCTs.
  • Substantial heterogeneity exists in adherence definition, analysis, and reporting.
  • Improved adherence reporting is crucial for enhancing the interpretation of RCT quality and results.