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Sample size for beginners

C D Florey1

  • 1Department of Epidemiology and Public Health, University of Dundee, Ninewells Hospital and Medical School.

BMJ (Clinical Research Ed.)
|May 1, 1993
PubMed
Summary

Researchers often neglect sample size estimation in health services research grant proposals. Ensuring adequate sample size is crucial for obtaining clear study results and strengthening grant applications.

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Area of Science:

  • Health Services Research
  • Grant Writing
  • Biostatistics

Background:

  • Grant proposals frequently lack sample size estimations, hindering health services research.
  • Research committees require evidence of adequate study size for reliable outcomes.
  • Underestimating sample size can lead to inconclusive findings and wasted resources.

Purpose of the Study:

  • To highlight the critical importance of sample size determination in health services research grant proposals.
  • To provide a clear explanation of sample size concepts for researchers.
  • To encourage greater attention to sample size calculations in grant applications.

Main Methods:

  • The abstract discusses the conceptual framework for determining sample size.
  • It emphasizes the need for evidence-based sample size justification.
  • The study advocates for illustrated explanations to simplify complex statistical concepts.

Main Results:

  • Failure to estimate sample size is a common and significant drawback in grant applications.
  • Adequate sample size is essential for research committees to assess study validity.
  • Clear explanations can improve researchers' understanding and application of sample size principles.

Conclusions:

  • Accurate sample size estimation is vital for successful health services research grants.
  • Researchers must prioritize sample size calculations to ensure study power and clarity.
  • Simplified guidance on sample size determination can enhance grant proposal quality.

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