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Colon (Root/Wildcard) Issue

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Colon (Root/Wildcard) Issue

I should have probably posted this here:

I have been running regressions under the pretense that the colon acts as a 'root call.' However when I attempted to verify this assumption I found that my programs were not equivalently modelling the data. I have included sample program code and their respective results. Does anyone have any ideas? Am I accidentally programming a canonical analysis?

PROGRAM A:
proc reg;
model risk_:=male age_cat ...;
run;
RESULTS:
risk_radon: R2=.5239; F=1.10
risk_lead: R2=.6433; F=1.80


PROGRAM B:
proc reg;
model risk_radon=male age_cat ...;
run;
proc reg;
model risk_lead=male age_cat ...;
run;
RESULTS:
risk_radon: R2=.5930; F=1.26
risk_lead: R2=.6821; F=1.86


Any ideas? I'm stumped.
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