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RE: st: How to plot ORs and CI - results of a logistic regression


From   Sofia Ramiro <sofiaramiro@hotmail.com>
To   Statalist <statalist@hsphsun2.harvard.edu>
Subject   RE: st: How to plot ORs and CI - results of a logistic regression
Date   Sun, 1 Jul 2012 20:41:47 +0100

Thank you very much for your hel, Roger.
The first part worked very well and now I manage to include the variable labels, thanks!
however, I got some problems with the 2nd part

. bmjcip S_1 S_2 S_3, cformat(%8.2f)
option ftrim not allowed

I still tried using other cformats and even xmlsub, but none of them worked.
Can you please help me?

thanks!

Sofia

----------------------------------------
> Date: Sun, 1 Jul 2012 20:12:14 +0100
> From: r.newson@imperial.ac.uk
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: How to plot ORs and CI - results of a logistic regression
>
> To reconstruct the variable labels into a variable with value labels,
> use the -label- option of -parmest-, together with the -sencode-
> package, which you can also download from SSC, and which is a "super"
> version of -encode-. As in:
>
> #delim ;
> logistic asdasimprov3M1 asdascalc male num_anos_escolaridade
> eva_total_colunaconvhighlow4;
> parmest, norestore eform label;
> sencode label, gene(parmlab);
> twoway scatter parmlab estimate,
> xline(1) ylab(, valuelabel angle(0)) ||
> rcap min95 max95 parmlab, horizontal
> legend(order(1 "point estimate"
> 2 "95% conf. int.") pos(6))
> xlabel(0(1)8) xtitle("Odds Ratio") ytitle("");
>
> And, if you want to print the estimates and confidence limits on the
> right-hand side of the graph, then you can download the -sdecode- and
> -bmjcip- packages from SSC, and use those. (-sdecode- is a "super"
> version of -decode-, and -bmjcip- is a front end for -sdecode-.) As in:
>
> #delim ;
> logistic asdasimprov3M1 asdascalc male num_anos_escolaridade
> eva_total_colunaconvhighlow4;
> parmest, norestore eform label;
> sencode label, gene(parmlab);
> clonevar S_1=estimate;
> clonevar S_2=min95;
> clonevar S_3=max96;
> bmjcip S_1 S_2 S_3, cformat(%8.2f);
> gene confint=S_1+" "+S_2+" "+S_3;
> sencode confint, many replace;
> twoway scatter parmlab estimate,
> xline(1) ylab(, valuelabel angle(0)) yaxis(1) ||
> rcap min95 max95 confint, horizontal yaxis(2) || ,
> legend(order(1 "point estimate"
> 2 "95% conf. int.") pos(6))
> xlabel(0(1)8) xtitle("Odds Ratio") ytitle("");
>
> This should give the confidence intervals for the odds ratios on the
> right-hand axis to 2 decimal places. (Let me know if it doesn't.)
>
> Best wishes
>
> Roger
>
>
> Roger B Newson BSc MSc DPhil
> Lecturer in Medical Statistics
> Respiratory Epidemiology and Public Health Group
> National Heart and Lung Institute
> Imperial College London
> Royal Brompton Campus
> Room 33, Emmanuel Kaye Building
> 1B Manresa Road
> London SW3 6LR
> UNITED KINGDOM
> Tel: +44 (0)20 7352 8121 ext 3381
> Fax: +44 (0)20 7351 8322
> Email: r.newson@imperial.ac.uk
> Web page: http://www.imperial.ac.uk/nhli/r.newson/
> Departmental Web page:
> http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/
>
> Opinions expressed are those of the author, not of the institution.
>
>
> On 01/07/2012 19:13, Sofia Ramiro wrote:
> > Dear Statalist members,
> >
> > I am trying to plot the results of a logistic regression. I would like to have a graph with the ORs and 95%CI plotted.
> > On the y-axis I would like to include the label of the variables names and, ideally (if possible), I would like to add, on the right hand side of the graph, the ORs and 95%CI written (just as we see for the forrest plots in a meta-analysis).
> > Having reviewed what as been written on this topic on statalist, this is what I did:
> >
> > logistic asdasimprov3M1 asdascalc male num_anos_escolaridade eva_total_colunaconvhighlow4
> > parmest, norestore eform
> > egen axis= axis(estimate), label(parm)
> > twoway scatter axis estimate, ///
> > xline(1) ylab(, valuelabel angle(0)) || ///
> > rcap min95 max95 axis, horizontal ///
> > legend(order(1 "point estimate" ///
> > 2 "95% conf. int.") pos(6)) ///
> > xlabel(0(1)8) xtitle("Odds Ratio") ytitle("")
> >
> > My problems are:
> > - On the y-axis I get the variables' names, but they are abbreviated names for my own use - how do I manage to put there labels - eg instead of male, I would like to have "Male gender (vs. female)" ?
> > - Is it to possible to create a column on the right hand side of the graph where the ORs and 95%CI are written (in addition to being ploted in the graph)? If yes, how?
> >
> > thanks!
> >
> > Sofia
> >
> > *
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> > * http://www.ats.ucla.edu/stat/stata/
> >
>
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