I am currently
doing a meta-analysis of studies that look at the effects
of protein intake
on body composition. I want to set up a 2-level model
that models the
within and between study variation, as outlined in Joop
Hox's chapters on
meta-analysis in his books. I've seen examples for HLM and SAS on
the
web, but these are not the pieces of software that I use. In an
attempt
to learn how to do a meta-analysis with the GUI interface of S-plus
(I'm also trying it with GenStat..I've cross-posted this problem to the GENSTAT
list so I hope that doesn't bother anyone), I've
tried to adapt the following
SAS code (for a meta-analysis of teacher
expectancy effects by
Raudenbush):
Data meta;
Infile
'c:\meta.txt';
Input effect sd week studyID;
Invsd=1/(sd);
Run;
Proc mixed covtest
data=""> Class studyID;
Weight
invsd;
Model effect = week /s;
Random int
/type=un sub=studyID;
Parms (0.1) (1)/hold=(2);
Run;
I've been trying to do something similar in both S-Plus 6.2 and
GENSTAT 7.0 without
success.
Anyone who might be able to help me with
how to set up a multilevel meta-
analysis with S-Plus 6.2, it would be
tremendously
appreciated.
Thank you for your
time,
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