If you have the bounds of a 95% CI in the form of: exponential(estimate +/- 1.96*SE)
then it is easy to get the SE back: SE = (log(UL) - log(LL)) / (2*1.96) Then supply the estimates and the SEs to the forest() function: forest(estimate, sei=SE) You can use: forest(estimate, sei=SE, transf=exp) if you want to exponentiate the estimates and CI bounds. Alternatively, you can use: forest(estimate, sei=SE, atransf=exp) to exponentiate the x-axis values. Best, -- Wolfgang Viechtbauer http://www.wvbauer.com/ Department of Methodology and Statistics Tel: +31 (0)43 388-2277 School for Public Health and Primary Care Office Location: Maastricht University, P.O. Box 616 Room B2.01 (second floor) 6200 MD Maastricht, The Netherlands Debyeplein 1 (Randwyck) ----Original Message---- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Kim Jung Hwa Sent: Monday, December 14, 2009 05:22 To: C.H. Cc: r-help@r-project.org Subject: Re: [R] help: forest plots > Thanks for this link. It helps, but I have to make lots of forest > plots and these R scripts are not generic. > > Are you aware of similar functions as forest(), which can take input > in the form of estimates, lower_limit, upper_limit? Thanks a lot! > > ~Kim > > On Sun, Dec 13, 2009 at 8:12 PM, C.H. <chainsawti...@gmail.com> wrote: > >> This one does required the metafor package. >> >> http://tables2graphs.com/doku.php?id=04_regression_coefficients >> >> >> >> On Mon, Dec 14, 2009 at 8:13 AM, Kim Jung Hwa >> <kimhwamaill...@gmail.com> >> wrote: >>> Hi All, >>> >>> I'm fitting a Poisson regression. And I want to plot 95% Confidence >>> Interval of Regression Estimates. >>> >>> After coming back to original scale (using following formula): >>> >>> exponential(estimate +/- 1.96*SE), >>> >>> at best I can get the output in the form of estimates, lower_limit, >>> upper_limit values. >>> >>> As far I know forest() in metafor package needs input in the form of >>> estimates and their variances. In the above case can I still use >>> forest()? OR if there exists some other function which takes such >>> input and gives forest plots? >>> >>> Any help would be highly appreciated, >>> Thanks, >>> Kim ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
