I am trying to find to retain the value of 1 if a specific date (dg_date) occurred within an interval and 0 otherwise. The interval start and end date are presented with the variables, start and end.
data a;
input patientid dg_date : mmddyy10. start : mmddyy10. send : mmddyy10. ;
format dg_date start end mmddyy10.;
datalines;1 5/5/2009 1/1/2006 2/2/2006
1 5/5/2009 2/2/2007 3/2/2007
1 5/5/2009 5/1/2009 6/1/2009
1 5/5/2009 7/7/2009 12/1/2009
2 1/2/2007 1/2/2006 12/2/2006
2 1/2/2007 12/31/2006 5/5/2007
2 1/2/2007 6/6/2007 7/7/2007;
run;
Output
patientid outcome
1 0
1 0
1 1
1 0
2 0
2 1
2 0
data want;
set a;
if start < dg_date < send then flag=1;
else flag=0;
run;
@lillymaginta wrote:
I am trying to find to retain the value of 1 if a specific date (dg_date) occurred within an interval and 0 otherwise. The interval start and end date are presented with the variables, start and end.
data a; input patientid dg_date : mmddyy10. start : mmddyy10. send : mmddyy10. ; format dg_date start end mmddyy10.; datalines;1 5/5/2009 1/1/2006 2/2/2006 1 5/5/2009 2/2/2007 3/2/2007 1 5/5/2009 5/1/2009 6/1/2009 1 5/5/2009 7/7/2009 12/1/2009 2 1/2/2007 1/2/2006 12/2/2006 2 1/2/2007 12/31/2006 5/5/2007 2 1/2/2007 6/6/2007 7/7/2007; run;
Output patientid outcome 1 0 1 0 1 1 1 0 2 0 2 1 2 0
data want;
set a;
if start < dg_date < send then flag=1;
else flag=0;
run;
@lillymaginta wrote:
I am trying to find to retain the value of 1 if a specific date (dg_date) occurred within an interval and 0 otherwise. The interval start and end date are presented with the variables, start and end.
data a; input patientid dg_date : mmddyy10. start : mmddyy10. send : mmddyy10. ; format dg_date start end mmddyy10.; datalines;1 5/5/2009 1/1/2006 2/2/2006 1 5/5/2009 2/2/2007 3/2/2007 1 5/5/2009 5/1/2009 6/1/2009 1 5/5/2009 7/7/2009 12/1/2009 2 1/2/2007 1/2/2006 12/2/2006 2 1/2/2007 12/31/2006 5/5/2007 2 1/2/2007 6/6/2007 7/7/2007; run;
Output patientid outcome 1 0 1 0 1 1 1 0 2 0 2 1 2 0
Thank you for the prompt response!
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