__Calculator for confidence intervals of odds ratio in an unmatched case control study. For example groups of cases and controls studied to assess a treatment or exposure to a suspected causal factor.__ This calculator works off-line. (IE4) #### Programme written by DJR Hutchon. Enter data into the boxes "A","B","C",and "D" or

into boxes "A", "A+B", "C", and "C+D" Enter titles into blank boxes.

This calculator is for educational use. It is believed accurate but no responsibility for accuracy of the results is accepted by the author. David J R Hutchon BSc, MB, ChB, FRCOG Consultant Gynaecologist, Memorial Hospital, Darlington, England.

You are welcome to keep this page and use the calculator off-line. I would appreciate an E-mail if you find it useful enough to do so. E-mail to me at DJRHutchon@hotmail.co.uk

31/3/2001

Reference J Martin Bland and Douglas G Altman Statistics Notes: The odds ratio BMJ 2000;320:1468