I have patient characteristics such as gender, age, tissue type (normal or tumor), tumor location (cardia, corpus, antrum, fundus), Lauren classification (intestinal, diffuse, mixed), etc. and dependent variable is expression of a protein (= continued variable). I want to see if there is a correlation between all those clinical parameters and expression protein and if there is a difference in expression tissue type (normal or tumor) for male and female. What is the first step? Do I have to make plots and visually check if there are associations first? I also want to do multiple regression with the clinical parameters and protein expression as a dependent variable
Your help will be kindly appreciated .
Your help will be kindly appreciated .