Hello
I have a list of hospital where chart number is the patient identifier and account number is the unique identifier for the visit. I would like to create a data set of just the first visit for the chart number and the last visit for the chart number.
data have;
input @1 chartno $6.
@7 acctno $3.
@10 admdate yymmdd8.
@18 sepdate yymmdd8.
@26 postal $6.
;
format admdate yymmdd10. sepdate yymmdd10.;
cards;
1111110012012032920120331N0H2C1
2222220022012050120120515L4M6X6
3333330032012060120120607L4N4A8
1111110042012040220120410N4L1H4
4444440052012060320120615N4L1S7
5555550062012053120120603L0L2K0
2222220072012070120120713L4M6X6
2222220082012072020120725L9Y2M7
4444440092012081320120817N4L1S7
3333330102012061520120621L4N4A8
1111110112012110120121130N4L1H4
run;
For the above for chartno 111111 I want the data set to only include the March 31, 2012 visit and the November 30, 2012 visit. Any assistance greatly appreciated.
First/Last processing should work for this.
data want;
set have;
by chartno;
if first.chartno or last.chartno;
run;
First/Last processing should work for this.
data want;
set have;
by chartno;
if first.chartno or last.chartno;
run;
Not sure if I'm missing the problem here. Sort by chartno and date, set with by statement and use first. and last. variables:
proc sort data = have;
by chartno
admdate
;
run;
data FirstAndLast;
set have;
by chartno
admdate
;
if first.chartno
or last.chartno
;
run;
Or
Proc sql;
create table want as
select chartno, min( admdate) as FirstVisit format=yymmdd10., max(admdate) as LastVisit format=yymmdd10.
from have
group by chartno;
quit;
Thank you so much for all the really great answers. I chose Reeza's only because simple is best! I knew when I posted it the answer would be simple but I could not get the correct syntax. Thanks again.
Build your skills. Make connections. Enjoy creative freedom. Maybe change the world. Registration is now open through August 30th. Visit the SAS Hackathon homepage.
Register today!Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.
Find more tutorials on the SAS Users YouTube channel.
Select SAS Training centers are offering in-person courses. View upcoming courses for: