Counting your chickens before they're hatched: power analysis.
review · Level V
Where this comes from
- Record sourced from PubMed, PMID 24835566.
- Also identified by DOI 10.1053/j.jfas.2014.05.001.
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- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
How does an investigator know that he has enough subjects in his study design to have the predicted outcomes appear statistically significant? In this Investigators' Corner I discuss why such planning is necessary, give an intuitive introduction to the calculations needed to determine required sample sizes, and hint at some of the more technical difficulties inherent in this aspect of study planning.
Medical subject headings
- Biomedical Research
- Research Design
- Sample Size