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Posts: 22

# Calculating Age in SAS by assigning cases

[ Edited ]

Hi. This is my data

dt_birth  dt_death

4/21/1957 4/21/1967

4/21/1965

4/3/1976

I have to create a 3rd column called age. It should be dt_death - dt_birth if dt_death is present or otherwise it should be today's date- dt_death.

I am using the following procedure but it is giving syntax errors

proc sql ;

create table new as

select *, case Age

when dt_death is not null then int(yrdif(dt_birth,dt_death,'ACT/365')

else int(yrdif(dt_birth,date(),'ACT/365')

end

from old;

I think there is a problem here.

when dt_death is not null then

can you suggest any alternative methods?

Accepted Solutions
Solution
‎04-22-2017 12:04 AM
Super User
Posts: 23,999

## Re: Calculating Age in SAS by assigning cases

Use COALESCE instead, but I suspect your error is related to missing parentheses and incorrect SQL code.

int(yrdif(dt_birth,date(),'ACT/365') -> You have 3 open and only 2 closing parentheses.

END - no variable name here?

``int(yrdif(dt_birth, coalesce(dt_death, date()), 'ACT/365') as Age``

If you want a CASE statement it would be something like:

``````case
when not missing(dt_death) then int(yrdif(dt_birth, dt_death, 'ACT/365'))
else int(yrdif(dt_birth, date(), 'ACT/365'))
end as AGE``````

All Replies
Solution
‎04-22-2017 12:04 AM
Super User
Posts: 23,999

## Re: Calculating Age in SAS by assigning cases

Use COALESCE instead, but I suspect your error is related to missing parentheses and incorrect SQL code.

int(yrdif(dt_birth,date(),'ACT/365') -> You have 3 open and only 2 closing parentheses.

END - no variable name here?

``int(yrdif(dt_birth, coalesce(dt_death, date()), 'ACT/365') as Age``

If you want a CASE statement it would be something like:

``````case
when not missing(dt_death) then int(yrdif(dt_birth, dt_death, 'ACT/365'))
else int(yrdif(dt_birth, date(), 'ACT/365'))
end as AGE``````
Contributor
Posts: 22

## Re: Calculating Age in SAS by assigning cases

Thanks a lot Reeza!! It worked!!
☑ This topic is solved.