Hello,
I recently did a SAS Statistics 1 exercise (st107d05.sas) and got different results for the model fit statistics (Everything else was the same and displayed in a different order, I assume it's because I didn't apply a format)
I was wondering if there is a difference with the following reference coding techniques because I always thought they were same:
My code & some output
proc logistic data=STAT1.safety plots(only)=(effect oddsratio);
class Size (ref="1") Region (ref="Asia")/param=ref;
model unsafe (event="1")=Weight Region Size/ clodds=pl selection=backward;
UNITS weight= -1;
store issafe;
title 'LOGISTIC MODEL (3): Backwards Elimination';
run;

Solution code & some output
proc logistic data=STAT1.safety plots(only)=(effect oddsratio);
class Region (param=ref ref='Asia')
Size (param=ref ref='1');
model Unsafe(event='1') = Weight Region Size / clodds=pl selection=backward;
units Weight = -1;
store isSafe;
title 'Logistic Model: Backwards Elimination';
run;

Thank you!