From floated to conventional confidence intervals for the relative risks based on published dose-response data
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1Karolinska Institutet, National Institute of Environmental Medicine, Nobelsvag 13, 17155 Stockholm, Sweden. nicola.orsini@ki.se
Abstract:
A dose-response meta-analysis of epidemiological studies can encounter different types of confidence intervals (floated vs. conventional). This paper illustrates how to back calculate conventional confidence intervals from a set of relative risks reported with floated confidence intervals or floated standard errors. Furthermore, we provide an implementation of the formulas in a user-friendly program developed for Stata software. I exemplify the point using published data about alcohol intake and endometrial cancer incidence from the Million Women Study.
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