Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.stat.math.independent

Topic: offset adjustment in Cox proportional hazard?
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  
Ralph Wasson

Posts: 108
Registered: 12/6/04
offset adjustment in Cox proportional hazard?
Posted: Jan 16, 2014 10:15 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

In the logistic regression, if I select all the events and a percentage
of non-events, I need to either assign weights or apply offset
adjustment so that my predicted values would reflect the ratio of bads
to goods in the original data set. How about in Cox proportional hazard
model with panel data?
Then, here is a sampling methodology and I think is reasonable but would
like your opinions.
Suppose I have a large panel data set and the status (event or non-
event) is recorded at the last observation of each individual. First, I
create a data set containing only the last observation of each
individual. Second, I select 10% (say) of the events and 10% (say) of
the non-events. Third, I merge the stratified sample with the original
panel data to form a panel sample.
Do you think this sampling methodology is reasonable?
Thank you much for your help.
John




Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.