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Calculating Age in SAS by assigning cases

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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?


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‎04-22-2017 12:04 AM
Super User
Posts: 17,963

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

View solution in original post


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Solution
‎04-22-2017 12:04 AM
Super User
Posts: 17,963

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.

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