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Sample size nomograms for interpreting negative clinical studies.
Annals of Internal Medicine
|August 1, 1983
Summary
Interpreting non-significant clinical studies is challenging. New sample size nomograms help clinicians assess if study sample sizes adequately detect clinically important effects, aiding interpretation of negative study results.
Area of Science:
- Clinical study interpretation
- Biostatistics
- Medical research methodology
Background:
- Interpreting clinical studies with non-significant results presents challenges.
- A key concern is whether the sample size was adequate to detect a clinically meaningful effect.
Purpose of the Study:
- To develop and present sample size nomograms for interpreting non-significant clinical studies.
- To provide clinicians with a tool to assess the adequacy of sample sizes in negative studies.
Main Methods:
- Development of a pair of sample size nomograms.
- Nomograms utilize common levels of statistical significance.
- Examples are provided to illustrate usage.
Main Results:
- The nomograms offer a practical method for evaluating sample size adequacy.
- They assist in determining if a negative study could reliably detect clinically important differences.
Conclusions:
- The developed nomograms serve as a valuable reference for clinicians.
- These tools aid in the appropriate interpretation of apparently negative clinical study findings.
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