I have a SPSS data set with 70 respondents with disease and 70 control respondents without disease. I also have a list of 18 symptoms that they could have. Is there a way to ascertain which symptoms contribute more to the diagnostic? Which statistc test should I use?
logistic regression can be used when the outcome variable is binary. You can code having and not having a disease as 1 and 0 and the 18 symptoms will be your predictor variables. If you're planning to use SPSS, perhaps you might find this useful