I am using SAS 9.4 to run a logistic regression predicting 5% weight loss (fiverper, 0 =No, 1 =yes) with time overweight (continuous variables) as the independent variable - This is the first way I tried it - proc logistic descending; class Fiveper (param=ref ref='1'); model time= now weight bmi raceth0_1 raceth0_2 college status level binge; run; ** QUESTION** Do I need to class my other dichotomous variables - college, status, level, binge - or are they ref =0 automatically? This is the second way I tried it - proc logistic data =dummy_11; class fiveper (ref = "1") raceth (ref = "0")college (ref="1") status (ref="1") level (ref="1") binge (ref="1") / param = ref; model fiveper = now weight bmi raceth college status level binge / link = glogit; run; On the second way, I feel like it is not reference correctly, even though I put college (ref="1') it is coming up in the odds ratios tables as college 0 vs 1. Thank you for your help!
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