Date:         Fri, 18 Jan 2002 08:23:23 -0500
Reply-To:     diskin.dennis@KENDLE.COM
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         diskin.dennis@KENDLE.COM
Subject:      Re: age calculations etc
Comments: To: David Yeates <david.yeates@UHCE.OX.AC.UK>
Content-type: text/plain; charset=us-ascii

David,

There are certainly several ways to do this. One would be:
daystobd = mod(juldate(&refer),1000) - mod(juldate(birth),1000);
This will give you a negative if &refer is past the birthday in the current
year.
Is this what you wanted ?

HTH,
Dennis Diskin





From: David Yeates <david.yeates@UHCE.OX.AC.UK>@LISTSERV.UGA.EDU> on
      01/18/2002 07:23 AM

Please respond to David Yeates <david.yeates@UHCE.OX.AC.UK>

Sent by:  "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>


To:   SAS-L@LISTSERV.UGA.EDU
cc:

Subject:  age calculations etc


Hi All,

I have been puzzling over the following...

Given the birth-date and another reference date refer-date I can calculate
the exact age using that old favourite macro

%macro age(birth, refer);
   int((intck('month',&birth,&refer)-(day(&birth)>day(&refer)))/12);
%mend age;

where &birth and &refer are the two dates.  Now what I need having
calculated the age is exactly how many days are there from the birthday in
the year corresponding to refer-date to refer-date itself.

Any ideas very welcome.

Kind regards
David
UHCE, Oxford University