[R] How to do survival analysis with time-related IVs?

[Tianxu]

Thanks. The first two links are helpful.

For the log-reg, I was initially thinking that we need to re-arrange the
dataset to make ID-Year observations (I think some books are suggesting
this), and then run regression on "hazard rate". I did not know whether we
should write code to calculate the hazard rate by ourselves. However, the
paper solved my puzzle. Thanks!



Tianxu wrote:
> 
> Hello folks,
> 
>  
> 
> I am wondering how to do survival analysis with time-related IVs in R. For
> example,
> 
>  
> 
>> > If we have time-related variables, such as the Overall Condition of
> 1990, 1991 etc., how can we include these variables in coxph model? 
> 
>> > 
> 
>> > If we can not use coxph model, do we need to rearrange the dataset to
> make it something like:
> 
>> >      ID time age drug censor     Year   Overall Condition 
> 
>> > 1     1    5  46    1      0     1990              XXX
> 
>> > 2     1    5  35    1      0     1991              XXX1
> 
>> > 3     1    6  35    1      1     1992              XXX2
> 
>> > 4     2    5  46    1      0     1990              XXX
> 
>> > 5     2    6  35    1      1     1991              XXX1
> 
>> > 6     3    6  35    1      1     1990              XXX2
> 
>  
> 
> And then run logistic regression using "censor" as the DV? 
> 
>  
> 
>  
> 
>  
> 
> Tianxu Chen 
> 
> 101 N. 33rd Street
> Academic Building, 3FL
> Drexel University
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> Phone: 1-215-895-2884(O)
> Email: tc332 at drexel.edu  
> 
>  
> 
> 
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> 
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