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Re: st: Meta-analysis questions


From   Rui Liu <ruiliu2010@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Meta-analysis questions
Date   Thu, 23 Sep 2010 17:15:58 -0400

Thank you so much for your response. Regarding question 1, I'm wondering
whether the random or randomi would be the best D&L method to use?

Rui

On Thu, Sep 23, 2010 at 4:54 PM, Rui Liu <ruiliu2010@gmail.com> wrote:
>
> Dear Tiago,
>
> Thank you so much for your response. Regarding question 1, I'm wondering whether the random or randomi would be the best D&L method to use.
>
> Rui
>
>
> On Thu, Sep 23, 2010 at 4:12 PM, Tiago V. Pereira <tiago.pereira@mbe.bio.br> wrote:
>>
>> Dear Rui,
>>
>> 1) Yes, the default is the fixed-effect inverse variance method if your
>> data is based on logor and selogor; typing "metan logor selogor, randomi"
>> will give you the DerSimonian-Laird method.
>>
>> Type
>>
>> help metan
>>
>> to see the options.
>>
>>
>> 2) As the message says, the option begg can handle only raw data (e.g. 2x2
>> tables, with a b c d counts)
>>
>> Type
>>
>> help metabias
>>
>> for further information
>>
>>
>> 3) You need to provide more information on your data set, and how the
>> typename variable was coded.
>>
>> Also, try the pdfs that the following link shows :
>>
>> http://tinyurl.com/342osna
>>
>>
>> Hope this helps.
>>
>> Tiago
>>
>>
>> --------------
>>
>> Hi. I'm a new user of STATA and the meta-analysis commands and have a
>> couple of questions...
>>
>> 1) For "metan logor selogor" command, is the default fixed effect? and
>> if I would like to test for the DerSimonian & Laird random effects is
>> it correct to type "metan logor selogor, random"?
>>
>> 2) I'm trying to do the command "metabias logor selogor, graph (begg)"
>> but is giving me the following error message:
>> Note: data input format theta se_theta assumed.
>> Only Egger or Begg tests can be used with two input variables theta se_theta
>> r(198);
>>
>> What is causing this and how should I resolve it?
>>
>> 3) I'm trying to do the command "metafunnel logor selogor, by
>> (typename)" where typename is the type of different study designs but
>> is it giving me the following error message:
>> Note: default data input format (theta, se_theta) assumed.
>> type mismatch
>> r(109);
>>
>> If i don't put in "by (typename)" it works fine and giving me the
>> funnel plot. What is causing this and how should I resolve it?
>>
>> Thank you so much in advance for your guidance.
>>
>> Rui
>>
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
>> *   http://www.stata.com/support/statalist/faq
>> *   http://www.ats.ucla.edu/stat/stata/
>

*
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