d 'ODDSRISK': module to convert Logistic Odds Ratios to Risk Ratios
d
d oddsrisk converts logistic regression odds ratios to relative
d risk ratios. When the incidence of an outcome is common in the
d study population; i.e. greater than 10%, the logistic regression
d odds ratio no longer approximates the risk ratio. As the
d incidence rate becomes more frequent, the more the odds ratio
d overestiamtes the risk ratio when its value is greater than 1,
d and the more it underestiamtes the risk ratio when under one. J.
d Zhang and K. Yu proposed a method of adjusting the logistic
d regression odds ratio in a cohort study or clinical trial so that
d it approximates the risk ratio. This is particularly important
d when the odds ratio is greater than 2.5 or under 0.5. The method
d has also been shown to be applicable for retrospective and
d observational studies as well.
d
d KW: logistic odds ratios
d KW: risk ratios
d KW: logistic regression
d
d Requires: Stata version 10.0
d
d Distribution-Date: 20080203
d
d Author: Joseph Hilbe
d Support: email jhilbe@@aol.com
d
f oddsrisk.ado
f oddsrisk.hlp