Date:         Tue, 28 Dec 2004 11:45:08 -0600
Reply-To:     "Dunn, Toby" <Toby.Dunn@TEA.STATE.TX.US>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Dunn, Toby" <Toby.Dunn@TEA.STATE.TX.US>
Subject:      Re: How can I select matched controls for 1:m case-control study
Comments: To: zhang yewu <zhangyw@NCMIH.BJMU.EDU.CN>
Content-Type: text/plain; charset="iso-8859-1"

Zhang,
 
What I think you are looking for is a simple SQL code should get you what you want in the fewest number of lines of code and still keep the readability to a maximum.
 
 
Search our arcives for:
Simple data querying problem
since:  01 december 2004 
 
And you will find a solution to a problem that you can easily modify to fit your needs.
 
HTH
Toby Dunn

________________________________

From: SAS(r) Discussion on behalf of zhang yewu
Sent: Tue 12/28/2004 10:17 AM
To: SAS-L@LISTSERV.UGA.EDU
Subject: How can I select matched controls for 1:m case-control study



Dear SAS-L,

I have two data set, one is for patients(cases), and the another for
non-patients(controls). the variables of two data sets are same. I should
pick out m matched nopatients for each patient. In each matched subgroup, a
patient and m non-patients should be same address, sex, and their age
difference shoud be within 6 months.

how can I make it?

Thanks

ZYW