| Date: | Thu, 6 Sep 2007 16:20:02 -0400 |
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| Reply-To: | David Friedman <harrypotterdhf@EARTHLINK.NET> |
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| Sender: | "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU> |
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| From: | David Friedman <harrypotterdhf@EARTHLINK.NET> |
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| Subject: | Program to Determine Out of Sequence Treatment Dates |
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| Content-Type: | text/plain; charset=ISO-8859-1 |
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I want to write a program which will show out of sequence/and or
overlapping dates for treatments. Let’s say I have the following
treatments in an input dataset:
Treatment Start Date Stop Date
A 1/1/07 2/1/07
B 2/1/07 3/1/07
C 3/1/07 4/1/07
D 4/1/07 5/1/07
E 2/2/07 2/23/07 *
F 3/1/07 4/1/07 *
* Out of Sequence or Overlapping
Treatment E has a Start Date of 2/2/07 and a Stop Date of 2/23/07. This
treatment would be out of sequence because Drug E should come after Drug
D. Another example might be Drug F (3/1/07-4/1/07) which has overlapping
dates with Drug C. Anyway my goal is to produce a report which shows (in
this case) Drugs E and F as being out of sequence and the reason.
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