Hi fellow users!
I am looking at the association between antibiotic exposure (exposure var) and risk of diabetes (outcome). Antibiotics are measured as a number of courses and are a continuous variable. I also have created some predefined categories of antibiotics courses. These are as follows: 0 (no exposure); <=3 courses, <= 6 courses, <=9 courses and >= 10 courses.
Now I have already got the hazard ratios, but I would like to know if there is a trend (positive) in the HR with increasing categories of antibiotics. Please suggest what my below syntax should look like when I am testing for trends.
Syntax:
proc phreg data= dataset;
model time * diab(0) = abx_cat5 / rl;
run;
Hello,
Maybe there's a solution within PROC PHREG (I don't know PROC PHREG well enough).
Otherwise I think you can use PROC FREQ for trend test.
The below info is taken from
Usage Note 30333: FASTats: Frequently Asked-For Statistics
https://support.sas.com/kb/30/333.html
Koen
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