Re: [R] metafor and meta-analysis at arm-level

2010-08-09 Thread Viechtbauer Wolfgang (STAT)
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Re: [R] metafor and meta-analysis at arm-level

2010-08-08 Thread Angelo Franchini
Original Message > From: Angelo Franchini [mailto:angelo.franch...@bristol.ac.uk] > Sent: Wednesday, August 04, 2010 16:26 > To: Viechtbauer Wolfgang (STAT) > Cc: 'Angelo Franchini'; r-help@r-project.org > Subject: RE: [R] metafor and meta-analysis at arm-level >

Re: [R] metafor and meta-analysis at arm-level

2010-08-05 Thread Viechtbauer Wolfgang (STAT)
010 16:26 To: Viechtbauer Wolfgang (STAT) Cc: 'Angelo Franchini'; r-help@r-project.org Subject: RE: [R] metafor and meta-analysis at arm-level > Hello Wolfgang. > > I'd appreciate if you could help me check whether I am doing the proper > thing to do an arm-level meta-an

Re: [R] metafor and meta-analysis at arm-level

2010-08-04 Thread Angelo Franchini
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 Angelo Franchini Sent: Tuesday, July 06, 2010 10:37 To: Wo

Re: [R] metafor and meta-analysis at arm-level

2010-07-09 Thread Viechtbauer Wolfgang (STAT)
day, July 06, 2010 10:37 To: Wolfgang Viechtbauer Cc: r-help@r-project.org; Angelo Franchini Subject: Re: [R] metafor and meta-analysis at arm-level > Hello Wolfgang, > > Thank you very much for your response. > When you mentionthe "appropriate design matrix", do you mean

Re: [R] metafor and meta-analysis at arm-level

2010-07-06 Thread Angelo Franchini
Hello Wolfgang, Thank you very much for your response. When you mentionthe "appropriate design matrix", do you mean by that the 'n1i, n2i, m1i, m2i, sd1i, sd2i' arguments of the rma function, or am I missing something? I read the documentation on metafor (introduction), rma/rma.uni and escalc, and

Re: [R] metafor and meta-analysis at arm-level

2010-07-04 Thread Wolfgang Viechtbauer
Hello Angelo, You can either supply the arm-level outcomes and corresponding sampling variances directly (via the yi and vi arguments) or supply the necessary information so that the escalc() or rma() functions can calculate an appropriate arm-level outcome (such as the log odds). See the docum

[R] metafor and meta-analysis at arm-level

2010-07-02 Thread Angelo Franchini
Hi, I have been looking for an R package which allowed to do meta-analysis (both pairwise and network/mixed-treatment) at arm-level rather than at trial-level, the latter being the common way in which meta-analysis is done. By arm-level meta-analysis I mean one that accounts for data provided at t