Calculator for confidence intervals of relative risk This calculator works off-line. (IE4)

Programme written by DJR Hutchon. Enter data into the boxes "A","B","C",and "D"

		Group characteristic
		Present	Absent
		(A+C)	(B+D)
OUTCOME	Total "yes" A+B=	A =	B =
	Total "no" C+D	C =	D=

Relative risk R =
95% confidence interval =
A permanent record of the analysis can be obtained by printing the page.
Ref: Gardner M J and Altman D G. Statisitics with confidence. BMJ publications. Reprint 1994 p 51-52

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@Postmaster.co.uk
1/10/1999