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From |
"Tiago V. Pereira" <tiago.pereira@mbe.bio.br> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Meta-analysis questions |

Date |
Thu, 23 Sep 2010 17:12:01 -0300 (BRT) |

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/

**Follow-Ups**:**Re: st: Meta-analysis questions***From:*"Tiago V. Pereira" <tiago.pereira@mbe.bio.br>

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