[R] Matching patients

[Bill Hyman]

Hi Bernardo,

Thank you so much. I appreciate it.

Bill



----- Original Message ----
From: Bernardo Rangel Tura <tura at centroin.com.br>
To: Bill Hyman <billhyman1 at yahoo.com>
Sent: Wed, February 2, 2011 12:55:56 AM
Subject: Re: [R] Matching patients

On Tue, 2011-02-01 at 11:01 -0800, Bill Hyman wrote:
> May I ask a clinical question? For a trial, we have a treatment group of small 

> size, say 30 patients. We want to selectmatching control patients from a bigger 
>
> group (100 patients) in terms of several clinical variables, such as age, tumor 
>
> stage etc. This practice is to select the closest matching set of control 
>cases. 
>
> I wonder if R has any routine or package that can help with this problem. Thank 
>
> you. Looking forward...
> 
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.


Hi Bill,

The package MatchIt solve your problem.

This allow you use several methods for matching and you can use formula
for create relations between variable if necessary 
-- 
Bernardo Rangel Tura, M.D,MPH,Ph.D
National Institute of Cardiology
Brazil