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Contributor
Posts: 29

help sum calculation by patient id

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     A       30

1     B      10

2     B      15

2     B      15

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!

Accepted Solutions
Solution
‎11-22-2017 07:01 AM
Super User
Posts: 8,214

Re: help sum calculation by patient id

[ Edited ]

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

All Replies
PROC Star
Posts: 549

Re: help sum calculation by patient id

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;
``````
Solution
‎11-22-2017 07:01 AM
Super User
Posts: 8,214

Re: help sum calculation by patient id

[ Edited ]

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

Contributor
Posts: 29

Re: help sum calculation by patient id

Thanks you all for providing the answers.

☑ This topic is solved.

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