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From |
"Carlo Lazzaro" <carlo.lazzaro@tin.it> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: R: Intervals time |

Date |
Tue, 22 Apr 2008 14:38:00 +0200 |

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 * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**st: RE : R: Intervals time***From:*alvine.bissery@chu-lyon.fr

**References**:**st: Intervals time***From:*alvine.bissery@chu-lyon.fr

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