yes, after all LSMESTIMATE trt*month 0 0 0 0.5 0 0 0 0 0 0.5 0 0 0 0 0 0 0 0; gave the same result as the 21 rows ESTIMATE statement I have been using so far. I had thought that with the LSMESTIMATE statement only 1 effect (i.e. trt, but not trt*month) could be specified because I misinterperted the following statement in the SAS documentation "In contrast to a multirow estimate in the ESTIMATE statement, you specify only a single effect in the LSMESTIMATE statement". Thanks, now I can shorten the code.
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