topic Re: help sum calculation by patient id in SAS Programming

help sum calculation by patient id

leahcho — Wed, 22 Nov 2017 02:50:08 GMT

Hi I need help with calculating the sum of observation by ID

My data look like this;

ID drug day_supply

1 A 30

1 B 10

2 B 15

I want to create a variable that sums up the day_supply

ID drug Total_day_supply

1 A 60

1 B 10

2 B 45

Thanks in advance!

Re: help sum calculation by patient id

kiranv_ — Wed, 22 Nov 2017 03:38:53 GMT

something like this

proc sql;
create table newtable as
select id, drug, sum(day_supply) as total_day_supply
from yourtable
group by id, drug;
quit;

Re: help sum calculation by patient id

art297 — Wed, 22 Nov 2017 03:43:52 GMT

Alternatively, you could use proc summary:

data have;
  input ID   drug $ day_supply;
  cards;
1     A       30
1     A       30
1     B      10
2     B      15
2     B      15
2     B      15
;

proc summary data=have;
  var day_supply;
  by id drug;
  output out=want (drop=_:) sum=total_day_supply;
run;

Art, CEO, AnalystFinder.com

Re: help sum calculation by patient id

leahcho — Wed, 22 Nov 2017 12:15:32 GMT

Thanks you all for providing the answers.