search for: exercisedate

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2008 Apr 28
1
Survival Regression with multiple events per subject
...lt;- survreg(formula=Surv(time,exercise)~itm+posret+negret, data=Data, dist="weibull") summary(survRegData) My Question is: how can I modify the above command for the use of multiple events per subject when the optionid is used for indicating the subject? The dataset look like: data | exercisedate | itm | posret | negret | optionid| exercise | time 1996 | 1996 | 1.4518 | 0.05487 |-0.4485 | 1 | 0 | 1 1997 | 1997 | 2.4535 | 0.00385 |-0.2525 | 1 | 1 | 5 1998 | 1998 | 1.2523 | 0.04486 |-0.1482 | 2 | 1 | 8 1999 | 1999...