Select observations based on the matching year and the border months

[Cruise]

Hi Folks,

I'm trying to subset data where

1. year(date_diagnosis)=year(claim_date)

and

2. Oct, Nov and Dec of year before and Jan, Feb and Mar of year after the year(claim_date) to account for border months.

Desired output is the data with variable mark (1,0) where 1 indicating the data I'm gonna keep.

Thanks for help. I greatly appreciate your time.

DATA HAVE;
format PAT_ID 1. CLAIM_DATE date9. YEAR 4. MARK 1.; 
informat CLAIM_DATE date9. YEAR 4. MARK 1.; 
input PAT_ID CLAIM_DATE YEAR MARK; 
CARDS;
1	27-Dec-08	2011	0
1	19-Dec-09	2011	0
1	1-Jun-10	2011	0
1	1-Oct-10	2011	1
1	15-Nov-10	2011	1
1	1-Aug-11	2011	1
1	3-Jan-12	2011	1
1	5-Jan-12	2011	1
1	29-Dec-12	2011	0
2	2-May-14	2014	1
2	15-Oct-14	2014	1
2	13-Jan-15	2014	1
2	1-Feb-15	2014	1
2	18-Mar-15	2014	1
2	30-Sep-15	2014	0
2	1-Oct-15	2014	0
3	27-Dec-08	2011	0
3	15-Dec-09	2011	0
3	1-Jun-10	2011	0
3	1-Oct-10	2011	1
3	15-Nov-10	2011	1
3	1-Aug-11	2011	1
3	3-Jan-12	2011	1
3	2-Apr-12	2011	0
3	23-Nov-15	2011	0
3	5-Oct-16	2011	0
;

data have1; set have; 
claim_year=year(claim_date);
claim_month=month(claim_date);
run; 

proc print data=have1; run;

[heffo]

Would this work:

data want;
	set have;
 	where mdy(10,1,year-1) <= CLAIM_DATE and mdy(3,31,year+1) >= CLAIM_DATE;
run;

[novinosrin · Accepted solution]

DATA HAVE;
format PAT_ID 1. CLAIM_DATE date9. YEAR 4. ; 
informat CLAIM_DATE date9. YEAR 4. MARK 1.; 
input PAT_ID CLAIM_DATE YEAR MARK; 
drop mark;
CARDS;
1	27-Dec-08	2011	0
1	19-Dec-09	2011	0
1	1-Jun-10	2011	0
1	1-Oct-10	2011	1
1	15-Nov-10	2011	1
1	1-Aug-11	2011	1
1	3-Jan-12	2011	1
1	5-Jan-12	2011	1
1	29-Dec-12	2011	0
2	2-May-14	2014	1
2	15-Oct-14	2014	1
2	13-Jan-15	2014	1
2	1-Feb-15	2014	1
2	18-Mar-15	2014	1
2	30-Sep-15	2014	0
2	1-Oct-15	2014	0
3	27-Dec-08	2011	0
3	15-Dec-09	2011	0
3	1-Jun-10	2011	0
3	1-Oct-10	2011	1
3	15-Nov-10	2011	1
3	1-Aug-11	2011	1
3	3-Jan-12	2011	1
3	2-Apr-12	2011	0
3	23-Nov-15	2011	0
3	5-Oct-16	2011	0
;

data want;
set have;
by pat_id;
Mark=year(claim_date)=year-1  and  10<=month(claim_date)<=12 
or
year(claim_date)=year+1  and  1<=month(claim_date)<=3 
or
year= year(claim_date);
run;

[Cruise]

Great! Thank you very much!