I have to select patients who has specific combinations of conditions as following:
1. patients with both P2 and the Pa;
2. patients with both the P3 and the Pa;
Patients must have P2 and P3 with the Pa to be eligible. Simply put: P2+Pa, P3+Pa, P2+P3+Pa combinations are acceptable.
data combinations; set have; array diagnosis[*] condition othercondition_1-othercondition_24; do i = 1 to dim(diagnosis); if diagnosis[i] in ('P2','P3') then x=1; if diagnosis[i] in ('Pa') then y=1; if x=1 and y=1 then output; end; drop i; run;
However, resulting data "combinations" has an information for single subject (row) repeated 20 times. Very strange. Any idea why that happened?
There were 95560 observations read from the data set WORK.HAVE.
NOTE: The data set WORK.COMBINATIONS has 20 observations and 66 variables.
Using SAS 9.4.
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