Date:         Fri, 18 Jan 2002 08:36:39 -0500
Reply-To:     "Chakravarthy, Venky" <Venky.Chakravarthy@PFIZER.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Chakravarthy, Venky" <Venky.Chakravarthy@PFIZER.COM>
Subject:      Re: age calculations etc
Comments: To: David Yeates <david.yeates@UHCE.OX.AC.UK>
Content-Type: text/plain; charset="iso-8859-1"

David,

There are two new DATE functions that allow a more direct way of calculating
what you want.

16   data _null_ ;
17      birth = "21jan1929"d ;
18      refer = today() ;
19      age = int(yrdif(birth,refer,'ACT/ACT')) ;
20      days = datdif(birth,refer,'ACT/ACT') ;
21      put age = days = ;
22   run ;

AGE=72 DAYS=26660

Kind Regards,

Venky
#****************************************#
#  E-mail: venky.chakravarthy@pfizer.com #
#          swovcc@hotmail.com            #
#  Phone:  (734) 622-1963                #
#****************************************#


-----Original Message-----
From: David Yeates [mailto:david.yeates@UHCE.OX.AC.UK]
Sent: Friday, January 18, 2002 7:24 AM
To: SAS-L@LISTSERV.UGA.EDU
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