Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: st: meta-analysis question


From   "b. water" <barleywater@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: meta-analysis question
Date   Thu, 2 Jul 2009 19:37:33 +0000

hi 
 
nicola orsini (from karolinska institute) provided me with this back in 2005 (i used (and still do) stata 8.2, should not make a difference if you are using stata 10):
 
// suppose you have 4 studies 
 
clear
input study cases total
1 20 1000
2 40 5000
3 30 1500
4 25 3300
end 
 
gen p = .
gen se = . 
 
// get proportions and std errors 
 
forv i =1(1)4 {
cii total[`i'] cases[`i']
qui replace p = r(mean) in `i'
qui replace se = r(se) in `i'
} 
 
// get the inverse variance-weighted proportion
// use the official Stata -vwls- command 
 
gen cons =1
vwls p cons, sd(se) 
 
// use the user written -metan- command 
 
// for fixed-effects meta-analysis
metan p se, nograph fixed 
 
// for random-effects meta-analysis
metan p se, nograph random
 
hth,
bw

----------------------------------------
> Subject: st: meta-analysis question
> Date: Thu, 2 Jul 2009 12:11:50 -0400
> From: Nader.Shaikh@chp.edu
> To: statalist@hsphsun2.harvard.edu
>
> I am doing a meta-analysis in which I will need to generate pooled
> prevalence rates (e.g., prevalence of congenital heart disease in
> children presenting with a murmur). Metan seems to require 2 groups. I
> only have a single group. How do I do this? Thanks. Nader Shaikh
>
>
> CONFIDENTIALITY NOTICE. This e-mail and attachments (if any) are the sole property of Children's Hospital of Pittsburgh of UPMC and may contain information that is confidential, proprietary, privileged or otherwise prohibited by law from disclosure or re-disclosure. This information is intended solely for the individual(s) or entity(ies) to whom this e-mail or attachments are addressed. If you have received this e-mail in error, you are prohibited from using, copying, saving or disclosing this information to anyone else. Please destroy the message and any attachments immediately and notify the sender by return e-mail. Thank you.
>
>
>
> *
> * 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/
_________________________________________________________________
Hotmail® has ever-growing storage! Don’t worry about storage limits. 
http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutorial_Storage_062009
*
*   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/



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