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Designing clinical research studies: Part II.

Joyce Colling1

  • 1Oregon Health and Sciences University, School of Nursing, Portland, OR, USA.

Urologic Nursing
|January 17, 2004
PubMed
Summary
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This guide explains sampling strategies, sample size determination, and key elements for quantitative clinical study methods. It helps new investigators design effective research protocols.

Area of Science:

  • Clinical Research Methodology
  • Quantitative Study Design

Background:

  • Designing small quantitative clinical studies requires understanding fundamental methodological principles.
  • Beginning investigators often need guidance on core research design elements.

Purpose of the Study:

  • To outline common sampling strategies and sample size determination.
  • To detail the essential components of the methods section in intervention studies.
  • To provide resources for novice researchers in clinical study design.

Main Methods:

  • Discussion of prevalent sampling techniques.
  • Guidance on calculating appropriate sample sizes.
  • Explanation of the three hallmarks of intervention studies.
  • Description of necessary elements for the methods section.

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Main Results:

  • Provides a framework for selecting appropriate sampling methods.
  • Offers criteria for determining adequate sample size.
  • Clarifies essential components for intervention study protocols.

Conclusions:

  • This article equips new investigators with essential knowledge for designing quantitative clinical studies.
  • Effective sampling and methods sections are crucial for study validity and reproducibility.