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st: RE : R: Intervals time


From   "Carlo Lazzaro" <carlo.lazzaro@tin.it>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE : R: Intervals time
Date   Tue, 22 Apr 2008 16:22:52 +0200

Dear Alvine,

is it something like this? 
.....................................................................
sum time if id==2 & treat==1

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        time |         3    3.333333    4.041452          1          8
......................................................................
HTH and Kind Regards,

Carlo
-----Messaggio originale-----
alvine.bissery@chu-lyon.fr wrote:

[snip]
Thank you Carlo, but this will not answer my question.
Maybe it was not clear !

Sata are as follows:

id	   begin	      end	   treat
1	04 Apr 2006	  06 Apr 2006	1
1	05 Apr 2006	  09 Apr 2006	0
1	08 Apr 2006	  12 Apr 2006	1
2	15 May 2006	  16 May 2006	1
2	16 May 2006	  24 May 2006	1
2	16 May 2006	  17 May 2006	1 

Subject 2 has only one treatment from 15 May 2006 to 16 May 2006.
Then he has two treatments from 16 May 2006 to 17 May 2006, and one
treatment
from 18 May 2006 to 24 May 2006.

This is the result I want to find !

Thanks 

Alvine


-----Message d'origine-----
De : owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] De la part de Carlo Lazzaro
Envoyé : 22 April 2008 14:38
À : statalist@hsphsun2.harvard.edu
Objet : st: R: Intervals time


Dear Alvine,
Please take a look at what follows:
------------------begin example-----------------------
g  begin_2 = date( begin,"dm20y")
format  begin_2%d
g   end_2 = date(  end,"dm20y")
format   end_2%d
g time= end_2- begin_2
g time_0=time if treat==0
g time_1=time if treat==1
-------------------end example------------------------

HTH and Kind Regards,

Carlo


alvine.bissery@chu-lyon.fr wrote:


Dear all,

My data deals with subjects who receive 1, 2 or more treatements over time.
We want to know how many time they spent with 1 treatment, 2 treatments, 3
treatments , ...

Data are as follows:

id	   begin	      end	   treat
1	04 Apr 2006	  06 Apr 2006	1
1	05 Apr 2006	  09 Apr 2006	0
1	08 Apr 2006	  12 Apr 2006	1
2	15 May 2006	  16 May 2006	1
2	16 May 2006	  24 May 2006	1
2	16 May 2006	  17 May 2006	1 

How can I calculate time spent with 1 treat for id=1, time spent with 2
treat
for id=1, ...

Maybe with after data has been stset ? 

Thank you for help !

Alvine Bissery

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