MedCalc
Mail a PDF copy of this page to:
(Your email address will not be added to a mailing list)
working
Skip to main content
Close
Download our user-friendly MedCalc statistical software for your Windows desktop. Download - More info

Other calculators ...

Free statistical calculators

Comparison of proportions calculator

Sample 1

 
 

Sample 2

 
 

Computational notes

MedCalc uses the "N-1" Chi-squared test as recommended by Campbell (2007) and Richardson (2011).

The confidence interval is calculated according to the recommended method given by Altman et al. (2000).

Literature

  • Altman DG, Machin D, Bryant TN, Gardner MJ (Eds) (2000) Statistics with confidence, 2nd ed. BMJ Books. (p. 49) Buy from Amazon
  • Campbell I (2007) Chi-squared and Fisher-Irwin tests of two-by-two tables with small sample recommendations. Statistics in Medicine 26:3661-3675. PubMed
  • Richardson JTE (2011) The analysis of 2 x 2 contingency tables - Yet again. Statistics in Medicine 30:890. PubMed

Recommended book

Statistics with Confidence: Confidence Intervals and Statistical Guidelines
Altman DG, Machin D, Bryant TN, Gardner MJ (Eds)

Buy from Amazon US - CA - UK - DE - FR - ES - IT

This introduction to confidence intervals has been updated and expanded to include methods for using confidence intervals, with illustrative worked examples and extensive guidelines and checklists to help the novice. There are six new chapters on areas such as diagnostic studies and meta-analyses.

This site uses cookies to store information on your computer. More info...