Logistic Regression help

Please help with this question:

A case-control study conducted in Ile-et-Vilaine, France, aims to find predictors for (o)esophageal cancer. The study recorded characteristics on AGE, ALCOHOL and TOBACCO usage of each patient under investigation. The variables have the following coding:
  • CANCER – equal to 1 if cancer is present in patient, 0 otherwise;
  • AGE2 = age group - coded with three age groups: 25-44 (1), 45-64 (2), 65+ (3);
  • ALCOHOL1 = alcohol consumption ,measured in grams per day - coded with four categories: 0-39 (1), 40-79 (2), 80-119 (3), 120+ (4);
  • TOBACCO1= tobacco consumption measured in grams per day - coded with four categories: 0-9 (1), 10-19 (2), 20-29 (3), 30+ (4).

    I am wondering in order to run this in SPSS, which variables should be place in the covariates and which should be place in the categorical covariates?

    Thank you.


Less is more. Stay pure. Stay poor.
Not an SPSS person, but they all look categorical to me. Can you convert the continuous variables back to continuous variables, which would make more since then discretizing them.