On Apr 16, 2014, at 4:07 AM, Göran Broström wrote:
> On 04/15/2014 10:51 PM, David Winsemius wrote:
>>
>> On Apr 15, 2014, at 6:32 AM, Therneau, Terry M., Ph.D. wrote:
>>
>>> You can do statistical tests within a single model, for whether
>>> portions of it fit or do not fit. But one cannot ta
On 04/15/2014 10:51 PM, David Winsemius wrote:
On Apr 15, 2014, at 6:32 AM, Therneau, Terry M., Ph.D. wrote:
You can do statistical tests within a single model, for whether
portions of it fit or do not fit. But one cannot take three
separate fits and compare them. The program needs context t
On Apr 15, 2014, at 6:32 AM, Therneau, Terry M., Ph.D. wrote:
> You can do statistical tests within a single model, for whether portions of
> it fit or do not fit. But one cannot take three separate fits and compare
> them. The program needs context to know how the three relate to one another
Hi Terry,
thank you for your suggestion. I tried to do it the way that you described.
I fitted my Cox model with strata and I get coefficients and P values for my
ZlnGalectin in the different strata (see summary below). So am not so
familiar with R so please excuse my perhaps stupid questions but
On 04/15/2014 05:00 AM, r-help-requ...@r-project.org wrote:
Hello,
I have the following problem. I stratified my patient cohort into three
ordered groups and performed multivariate adjusted Cox regression analysis
on each group separately. Now I would like to calculate a p for trend across
the h
You can do statistical tests within a single model, for whether portions of it fit or do
not fit. But one cannot take three separate fits and compare them. The program needs
context to know how the three relate to one another. Say that "group" is your strata
variable, trt the variable of inte
Hello,
I have the following problem. I stratified my patient cohort into three
ordered groups and performed multivariate adjusted Cox regression analysis
on each group separately. Now I would like to calculate a p for trend across
the hazard ratios that I got for the three groups. How can I do tha
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