Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st:meta-analysis


From   Tom Trikalinos <ttrikalin@mac.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st:meta-analysis
Date   Fri, 3 Sep 2004 11:56:39 +0300


Generally speaking, if you want to check whether any factor(s) X1 (X2...) affect(s) Theta (ie the Effect Size), a meta-regression framework is probably warranted:
Try using _metareg_ and check the documentation.

. findit metareg

. metareg Theta X1 X2, wsse(seTheta)

Really advanced analysis would be based on Bayesian approaches and is relatively easily implemented in WinBUGS (free specialist software, try googling it). Lots of papers in Stat Med on Bayesian meta-analysis.

Hope this helps,

Tom



On Sep 3, 2004, at 11:11 AM, cui liwei wrote:


thanks Tom, but I still want to know if the sample size will affect the results.
you see, the "meta" doesn't take into account the "n".

input n theta se_theta
18 4.37 1.0740
18 3.13 1.5602
20 3.51 1.8622
21 3.34 1.9122
18 4.25 .60029
end

meta theta se_theta





From: Tom Trikalinos <ttrikalin@mac.com>
Reply-To: statalist@hsphsun2.harvard.edu
To: statalist@hsphsun2.harvard.edu
Subject: Re: st:meta-analysis
Date: Tue, 31 Aug 2004 11:59:48 +0300

I suppose you know what you're doing;
. findit metan
OR
.findit meta

yields useful routines. Use Coef values as the effect size (Theta) and the SE thereof as SE_theta.

Good luck

Tom


On Aug 31, 2004, at 11:44 AM, cui liwei wrote:


Dear all,

Here are the results of several regress,how to perform meta-analysis.
thanks!

Obs Coef. Std.Err. t P>|t|
18 4.37 1.0740 4.07 0.001
18 3.13 1.5602 2.01 0.062
.
.
18 4.25 .60029 7.08 0.000

Cui

_________________________________________________________________
~{SkA*;z5DEsSQ=xPP=;Aw#,GkJ9SC~} MSN Messenger: http://messenger.msn.com/cn
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/
_________________________________________________________________
与联机的朋友进行交流,请使用 MSN Messenger:  http://messenger.msn.com/cn
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index