[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

From |
Nicola Orsini <nicola.orsini@ki.se> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: thanks / a new question - heterogeneity test |

Date |
Fri, 25 Nov 2005 09:31:12 +0100 |

Hi Andrei,

you can get the Q statistic, its p-value and the I2 statistic in different ways:

1) Use -metan- instead of -meta- command

The Q-test is stored in r(het)

The p-value is stored in r(p_het)

2) Use -metareg- instead of -meta- command

The Q-test is stored in e(Q)

The degrees of freedom of Q is stored in e(df_Q)

Then, you can easily calculate the p-value by yourself

scalar p_het = chiprob(e(df_Q), e(Q))

Nicola

Andrei Malinovschi wrote:

Dear statalisters,

I would like to start by thanking you for the quick

answer - special thanks to Maarten Buis, Neil

Shephard, Roger Newson and Hervé Stolowy. I got both

the answer + further ideas how to improve the process

/ my analysis.

I have now another problem when doing a metaanalysis

and running the meta command. I am interested in the

random pooled estimate (95% CI) and heterogeneity test

(Q and p-value). I have found that the random effect

(95%CI) is stored in the global macros S_1, S_3, S_4,

but I cannot find where Q and the p-value for

heterogeneity test are stored. Any suggestions or

another way to retrieve them?

A possible solution that I was thinking about and it

is probably too complicated would be to calculate Q

(from the mathematical formula) and then use heterogi

to get both the p-value for heterogeneity test and

even I^2 that is not given by meta command.

Thanks in advance!

Best regards,

Andrei

__________________________________ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com

*

* 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/

**References**:**st: thanks / a new question - heterogeneity test***From:*Andrei Malinovschi <a_malinovschi@yahoo.com>

- Prev by Date:
**RE: st: radar graphics in stata** - Next by Date:
**Re: Thanks! RE: st: A way to "set more off" forever?** - Previous by thread:
**st: thanks / a new question - heterogeneity test** - Next by thread:
**st: RE: thanks / a new question - heterogeneity test** - Index(es):

© Copyright 1996–2015 StataCorp LP | Terms of use | Privacy | Contact us | What's new | Site index |