Re: [R] metafor - code for analysing geometric means

2014-12-07 Thread Bert Gunter
an der Voet, H. > (2012). Transformations of summary statistics as input in meta-analysis for > linear dose-response models on a logarithmic scale: A methodology developed > within EURRECA. BMC Medical Research Methodology, 12(57). > > Best, > Wolfgang > >> -Original

Re: [R] metafor - code for analysing geometric means

2014-12-07 Thread Purssell, Ed
Michael Dewey; Purssell, Ed; r-help@r-project.org Subject: RE: [R] metafor - code for analysing geometric means With "geometric mean 1 CI /3.92", I assume you mean "(upper bound - lower bound) / 3.92". Two things: 1) That will give you the SE of the mean, not the SD of the observa

Re: [R] metafor - code for analysing geometric means

2014-11-14 Thread Viechtbauer Wolfgang (STAT)
p-boun...@r-project.org] > On Behalf Of Michael Dewey > Sent: Thursday, November 13, 2014 12:36 > To: Purssell, Ed; r-help@r-project.org > Subject: Re: [R] metafor - code for analysing geometric means > > On 13/11/2014 11:00, Purssell, Ed wrote: > > ?Dear All > >

Re: [R] metafor - code for analysing geometric means

2014-11-13 Thread Michael Dewey
On 13/11/2014 11:00, Purssell, Ed wrote: ?Dear All I have some data expressed in geometric means and 95% confidence intervals. Can I code them in metafor as: rma(m1i=geometric mean 1, m2i=geometric mean 2, sd1i=geometric mean 1 CI /3.92, sd2i=geometric mean 2 CI/3.92...etc, measure="

[R] metafor - code for analysing geometric means

2014-11-13 Thread Purssell, Ed
?Dear All I have some data expressed in geometric means and 95% confidence intervals. Can I code them in metafor as: rma(m1i=geometric mean 1, m2i=geometric mean 2, sd1i=geometric mean 1 CI /3.92, sd2i=geometric mean 2 CI/3.92...etc, measure="MD") All of the studies use geometric means.