Hello, I am looking to lag the exposure to outcome by a year. What I mean by this is that for a given year in my data, I want the exposure in one year to be associated with the outcome in the next, instead of the same year. This is because I want to avoid reverse causation. So if the exposure for 1999 is 26, I would want it to match with the outcome for 2000. Here is my code without the lag: PROC GENMOD data=data1;
CLASS StateID year (ref=first) event (ref=first);
MODEL Outcome =Exposure confounder / DIST=poisson LINK=log TYPE3 WALD offset=lnpop;
REPEATED SUBJECT=stateid;
run; I have an offset of state population and a repeated subject on stateID. Outcome is my main outcome and exposure is my main exposure. Confounder is a confounder. I do not think that the confounder should be lagged, just the main exposure and outcome. Thanks so much!
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