I am trying to summarize observations that occur in the month prior to specific date and create another summary to observations that occurred two months before the same date and so on.
id proc_date proc_type hosp_date
1 11/13/2005 a 12/1/2005
1 10/13/2005 a 12/1/2005
2 2/3/2004 b 3/1/2004
2 1/14/2004 c 3/1/2004
each id has one hosp_day but multiple proc_date.
The output I am looking is
during 1 months pre hosp_date would include;
id proc_date proc_type hosp_date
1 11/13/2005 a 12/1/2005
2 2/3/2004 b 3/1/2004
during the 2 months pre hosp_dae would include:
id proc_date proc_type hosp_date
1 10/13/2005 a 12/1/2005
2 1/14/2004 c 3/1/2004
Use function INTCK with option "CONTINUOUS" to get the number of months :
data want;
set have;
months = intck("MONTH", proc_date, hosp_date, "CONTINUOUS");
run;
proc sort data=want; by months id proc_date; run;
proc print data=want;
by months; id months;
var id proc_date proc_type hosp_date;
run;
Use function INTCK with option "CONTINUOUS" to get the number of months :
data want;
set have;
months = intck("MONTH", proc_date, hosp_date, "CONTINUOUS");
run;
proc sort data=want; by months id proc_date; run;
proc print data=want;
by months; id months;
var id proc_date proc_type hosp_date;
run;
Thank you!
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