oddsrisk converts logistic regression odds ratios to relative risk ratios. When the incidence of an outcome is common in the study population; i.e. greater than 10%, the logistic regression odds ratio no longer approximates the risk ratio. As the incidence rate becomes more frequent, the more the odds ratio overestiamtes the risk ratio when its value is greater than 1, and the more it underestiamtes the risk ratio when under one. J. Zhang and K. Yu proposed a method of adjusting the logistic regression odds ratio in a cohort study or clinical trial so that it approximates the risk ratio. This is particularly important when the odds ratio is greater than 2.5 or under 0.5. The method has also been shown to be applicable for retrospective and observational studies as well.
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Publisher Info
Software component provided by Boston College Department of Economics in its series Statistical Software Components with number
S456897.
Size: Programming language: Stata Requires: Stata version 10.0 Date of creation: 19 Dec 2007 Date of revision:
03 Feb 2008 Handle: RePEc:boc:bocode:s456897
Note: This module may be installed from within Stata by typing "ssc install oddsrisk". Windows users should not attempt to download these files with a web browser. Contact details of provider: Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA Phone: 617-552-3670 Fax: +1-617-552-2308 Email: Web page: http://fmwww.bc.edu/EC/ More information through EDIRC