I have several records per id: At subsequent times my patient
have received the medication amed or bmed
In the last record within id I woul'd like to generate
a variable abmed wich will be 1 (or some value x) only if the patient
has in the prior records experinced the use of both amed and bmed or will
be 0 otherwise.
id time amed bmed abmed
10 81 1 0 .
10 87 0 1 .
10 83 0 1 1
11 70 0 1 .
11 76 0 1 .
11 84 1 0 .
11 99 1 0 1
12 88 1 0 .
12 98 1 0 0
thank you
Giulio Rizzoli
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