Dear Dr. Viechtbauer:
Thanks so much! Now all these issues are clear.
With best regards.
Qiang Yue
From: Viechtbauer Wolfgang (STAT)
Date: 2013-05-23 05:06
To: qiangmoon; r-help
Subject: RE: RE: [R] using metafor for meta-analysis of before-after studies
(escalc, SMCC)
The mean
), we can not use the percentage change
to calculate SMCC, but have to get the raw change first?
With best wishes.
Qiang Yue
From: Viechtbauer Wolfgang (STAT)
Date: 2013-05-21 10:09
To: Moon Qiang; r-help
Subject: RE: [R] using metafor for meta-analysis of before-after studies
(escalc, SMCC
Hello, Michael.
Thanks very much, your suggestion is really helpful, and hopefully will address
our issue. I will also read the suggested references to learn more about
meta-analysis.
With best wishes.
Qiang Yue
From: Michael Dewey
Date: 2013-04-28 06:30
To: qiangmoon; Michael Dewey; wvb
regards.
Qiang Yue
From: Michael Dewey
Date: 2013-04-27 07:28
To: qiangmoon; wvb
CC: r-help
Subject: Re: [R] using metafor for meta-analysis of before-after studies
At 03:27 27/04/2013, Qiang Yue wrote:
Hello, Dr. Viechtbauer.
I am trying to perform a meta-analyis on a group
of before-after
, and
if it is possible to calculate the ¡®sdi¡¯ (the standard deviation of the
change scores) using the SD of percentage change.
Thank you very much, I am looking forward to your reply.
With best wishes.
Qiang Yue M.D.
Visiting Scholar of IMHR, University of Ottawa
1145 Carling Avenue, K1Z
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