Hi everyone, so i'm working with a dataset that has the variable called hisugbev (high sugared beverage intake in servings/week). I'm trying to create a categorical variable with four levels and then create indicator variables from this categorical variable. For some reason after I create the categorical variable and the indicator variables, when I run my model for one of the parameter estimates i get a value of 0 and 0 d.f. Could anyone tell me what the reason might be for that? This is my code below that may help: if hisugbev=0 then sweet=1; else if 0 gt hisugbev lt 1 then sweet=2; else if 1 ge hisugbev le 3 then sweet=3; else if 3 gt hisugbev then sweet=4; if sweet=1 then sugar1=1; else sugar1=0; if sweet=2 then sugar2=1; else sugar2=0; if sweet=3 then sugar3=1; else sugar3=0; if sweet=4 then sugar4=1; else sugar4=0; proc phreg; class sweet (param=ref ref='1'); model tpyrs*c5_1(0) = age sugar2 sugar3 sugar4; run; I get parameter estimates for sugar3 and sugar4 but not sugar2. ... View more