HELLO
I've got a data set containing about 2500 patients, of which 300 have my
interest (Group A).
I would like to extract a sample of 900 patients (Group B) out of the data
set that match Group A in age, sex and some other parameters. A Classical
Case-Control study with 3 controllers for each case.
Is anybody have a clue how the syntax look like??
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(( -:¦:- * Ishay * -:¦:-
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