CDKN2A and oropharynx cancer: Graph 2 with pChi2 <0.001 underlines the BMI paradox in for the whole head and neck squamous cell cancer sample, but according to univariate Cox-regressions of TNM8 groups (Tables 5 and 6), oral cavity and p16 negative oropharyngeal cancer patients’ OS and CSS is independent of BMI status.