Thnks to Prof. Frank E Harrell Jr , Prof. Bernardo Rangel Tura, and Prof.
Thomas Lumley for their response.
Tomas Karpati (MD)
The Michaelson Institute for the prevention of Blindness
Hadassah Medical Org.
email: [EMAIL PROTECTED]
Phone: +972-2-6256458, fax: +972-2-6232895
On Tue, 07 Sep 2004
Bernardo Rangel Tura wrote:
At , The Michaelson Institute wrote:
How can R be used to calculate the prevalence ratios using Cox
regression +
robust variance estimates ?
Well,
In Design package have a command: cph
This command have a option robsut with default=FALSE, but in help is
write:
...
At 09:27 07/09/2004, you wrote:
Bernardo Rangel Tura wrote:
At , The Michaelson Institute wrote:
How can R be used to calculate the prevalence ratios using Cox regression +
robust variance estimates ?
Well,
In Design package have a command: cph
This command have a option robsut with default=FALSE,
robust standard errors are available from coxph with the option
robust=TRUE.
-thomas
On 6 xxx -1, The Michaelson Institute wrote:
Hello, I'm an MD working in an eye clinic. I'm learning by myself to use R
for use in my research works and for implementation in a software project.
Hello, I'm an MD working in an eye clinic. I'm learning by myself to use R
for use in my research works and for implementation in a software project.
There are some authors who recomends the use of Cox regression as a
substitute for Logistic regression (a
