Review
doi: 10.1186/cc2428.
Epub 2003 Dec 30.
Statistics review 8: Qualitative data - tests of association
Affiliations
- PMID: 14975045
- PMCID: PMC420070
- DOI: 10.1186/cc2428
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Review
Statistics review 8: Qualitative data - tests of association
Crit Care.
2004 Feb.
Abstract
This review introduces methods for investigating relationships between two qualitative (categorical) variables. The chi2 test of association is described, together with the modifications needed for small samples. The test for trend, in which at least one of the variables is ordinal, is also outlined. Risk measurement is discussed. The calculation of confidence intervals for proportions and differences between proportions are described. Situations in which samples are matched are considered.
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References
-
- Everitt BS. The Analysis of Contingency Tables. 2. London, UK: Chapman & Hall; 1992.
-
- Bland M. An Introduction to Medical Statistics. 3. Oxford, UK: Oxford University Press; 2001.
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