Re: independent right-censor in survival analysis
- From: Richard Ulrich <Rich.Ulrich@xxxxxxxxxxx>
- Date: Thu, 20 Mar 2008 21:42:06 -0400
On Thu, 20 Mar 2008 02:14:01 -0700 (PDT), water
<waterloo2005@xxxxxxxxx> wrote:
How to understand independent right-censor?
Below is a sentence from a book,I can not understand it.
" A right-censoring mechanism is said to be independent if the failure
rates that apply to individuals on trial at each time t>0 are the same
as those that would have applied had there been no censoring."
Thanks in advance!
Assuming this is occurrence or recurrence of disease -
Look for contrast at the opposite side, the *dependency*.
Is the censoring correlated with any aspect/ trait/ symptom
of the disease?
If you are just chopping off follow-up at an arbitrary
number of years, presumably it does not affect their
future outcomes. If you chop off follow-up for one
analysis according to the same calendar date for everyone,
presumably that has nothing to do with their future
outcomes.
However.
If someone is censored because their phone number
no longer works, and you lost them "administratively"....
Could that have been because of illness, loss of job,
etc., which might be the fault of disease? Right-
censoring might indicate traits, etc., that (if you had a
group like this) would result in a much higher rate of
disease ("failure").
Hope that says it well enough.
--
Rich Ulrich
http://www.pitt.edu/~wpilib/index.html
.
- Follow-Ups:
- References:
- independent right-censor in survival analysis
- From: water
- independent right-censor in survival analysis
- Prev by Date: independent right-censor in survival analysis
- Next by Date: Re: independent right-censor in survival analysis
- Previous by thread: independent right-censor in survival analysis
- Next by thread: Re: independent right-censor in survival analysis
- Index(es):
Relevant Pages
|
Loading
