Fisher's "exact" test is for comparing two proportions, which is a completely
different problem than Cox regression, and so the test has no relevance to this
problem. It has, however, sparked a large literature of debate; already
alluded
to by many of the responses.
The tests in the coxph
Duncan Murdoch wrote:
> On 9/18/2007 12:41 PM, Daniel Brewer wrote:
>
>> Hello,
>> I might be barking up the wrong tree here, but I want to make sure I
>> have a full understanding of this. What I would like to know is what
>> tests are performed to give the p-values for each variable in the ta
I'll throw in a more recent citation:
Chi-squared and Fisher-Irwin tests of two-by-two tables with small
sample recommendations
Stat in Med 26:3661-3675; 2007
http://www3.interscience.wiley.com/cgi-bin/abstract/114125487/ABSTRACT
to which Frank Harrell has offered some comments here (bottom of pa
Daniel,
With regards to the use of Fisher's exact test when cell counts are less than
5, take a look at:
D'Agostino, RB, Chase, W and Belanger, A (1988). 'The appropriateness of some
common procedures for testing the equality of two independent binomial
populations.' 42:198-202.
Regards,
-
On 9/18/2007 12:41 PM, Daniel Brewer wrote:
> Hello,
> I might be barking up the wrong tree here, but I want to make sure I
> have a full understanding of this. What I would like to know is what
> tests are performed to give the p-values for each variable in the table
> that is the result of coxph
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