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Re: st: data structure for case control


From   "Sacamano, Paul L." <psacaman@jhsph.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: data structure for case control
Date   Mon, 10 Dec 2012 17:33:07 -0500

That is very helpful. Would it be the same for a study matching cases with controls on age frequency distribution? I currently have two files, one of cases and the other controls. I think I need to create an AGECLASS variable in both and then merge them together matching on AGECLASS. I expect there is a Stata command to then pair them together 1 to 2 within each class.
Thanks again.
Paul

On Dec 10, 2012, at 4:38 PM, Adam Olszewski <adam.olszewski@gmail.com> wrote:

> Hi Paul,
> The easy way would be to have one row per observation/patient and each
> variable as one column. There would be one column AGE and one column
> CASECONTROL, which you can assign 1 for cases and 0 for controls. This
> way you can do "standard epidemology table" commands such as -cc- or
> survival analysis with single-line commands using your "casecontrol"
> variable as an indicator of the arm.
> Good luck,
> Adam Olszewski
> 
> 
> On Mon, Dec 10, 2012 at 2:59 PM, Sacamano, Paul L. <psacaman@jhsph.edu> wrote:
>> Hi,
>> 
>> I am very new to Stata, very much a beginner.
>> 
>> I have a case-control study and am not sure how to setup the structure of the data file.
>> 
>> Using the variable age as an example, would I have:
>> 1) a variable for CASE_AGE and CONTROL_AGE, or
>> 2) have just one AGE variable, and include a CASE variable and a CONTROL variable?
>> 
>> Really appreciate any help you might have.
>> 
>> 
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