I am running Proc Logistic and it works perfectly fine. However, I would like to define reference level. For example, I have a categorical variable of "Race" with 4 levels ; Chinese, Malay, Indian and Others. I would like to make SAS reads "Chinese" as my reference but now SAS is reading "Others" as my reference. I am using this statement. proc logistic data=WORK.IMPORT3 descending; /* SAS treats the levels of Adenovirus_E in a descending order (high to low)*/ class HDB Sick_Season Race Smoker Service; model Adenovirus_E= HDB Sick_Season Race HDB*Race Smoker Service age_at_date_of_reprot_sick / expb; run; Please let me know how to solve this? Many thanks!
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