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Combined single subject trials.

T Johannessen1, D Fosstvedt, H Petersen

  • 1Department of Community Medicine and General Practice, University of Trondheim, Norway.

Scandinavian Journal of Primary Health Care
|March 1, 1991
PubMed
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Combined single subject trials analyze treatment crossovers to identify drug responder characteristics, not overall clinical benefit. This approach generates hypotheses for future group trials.

Area of Science:

  • Clinical Research Methodology
  • Biostatistics
  • Pharmacology

Background:

  • Single subject trials involve multiple treatment crossovers.
  • Independent trials can be combined for broader conclusions.
  • Conventional group trials focus on overall clinical benefit.

Purpose of the Study:

  • To identify characteristics of drug responders.
  • To extend conclusions from individual trials beyond a single subject.
  • To generate hypotheses for optimizing future group trial designs.

Main Methods:

  • Utilizing randomized controlled single subject trials.
  • Combining results from independent single subject trials.
  • Applying strict entry criteria, uniform procedures, and consensus outcome targets.

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Main Results:

  • The primary goal is to indicate features typical for drug responders.
  • External validity depends on rigorous trial prerequisites.
  • Elucidates new insights into treatment effects.

Conclusions:

  • Combined single subject trials offer a unique approach to understanding drug response variability.
  • This methodology is crucial for hypothesis generation in clinical research.
  • It aids in optimizing the design of subsequent group trials for enhanced efficacy and targeted therapies.