Suppose I have a sample population. I define obesity by three definitions i.e. On basis of BMI, Body Fat % and Waist circumference. I apply these definitions to the whole population.
Now I have three different groups of obese people, but all groups consist of same population, but proportions vary due to definition used. I want to compare the demographics of these groups e..g. Whether one group had taller height or greater age ?. How do I do that ? Which test do I run? Any guidance will be highly appreciated.