Hello everybody, I need your skills in statistics to solve a problem. I'm calculating a rate incidence of infection with the proc genmod using a Poisson regression model and an offset term which is the duration of the period. Indeed, there is a zero inflated model but as far as I know we will not obtain an upper CI. Could you confirm me that, or could you give the answer? Thank's in advance. proc genmod data=test;
class treatment;
model RATE_INF_SEV = TREATMENT / dist = poisson
link = log
offset = DURATION type1;
lsmestimate TREATMENT 'a' 1 0 / exp lower alpha=0.01 ;
lsmestimate TREATMENT 'b' 0 1 / exp lower alpha=0.01 ;
ods table LSMEstimates=LSMEstimates ;
run; Mehdi
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