|
|  |
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
st: RE: power calculation in a case control design
What's the (assumed) prevalence of exposure in your control group?
______________________________________
Paul F. Visintainer, PhD
Professor and Chair
Department of Epidemiology and Biostatistics
School of Public Health
New York Medical College
PH: (914) 594-4804
FX: (914) 594-4853
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of stata_user
stata_user
Sent: Friday, January 26, 2007 4:58 PM
To: [email protected]
Subject: st: power calculation in a case control design
Dear All,
I have a case control design with 83 cases and 139 controls.
I am intersted in the power of two sided 5% (or 1 sided) test to
detect
an approximate relative risk of less than 4.
Is there any possibility to have a solution using stata?
Thanks a lot
Sami
_________________________________________________________________
Get Hotmail, News, Sport and Entertainment from MSN on your mobile.
http://www.msn.txt4content.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/
