I am using a scale which consists of discrete values 0 (normal), 1 (mild), 2 (moderate), 3 (severe). I have used this scale for 200 patients.
I am going to find the correlation of this scale with some continuous variables, these variables also measured for 200 patients.
I don't think I can use multivariate or multiple regression because the dependent variable is discrete and the independent variables continuous. Can you please suggest a method to find this correlation?