Fig. 4From: Seven-CpG-based prognostic signature coupled with gene expression predicts survival of oral squamous cell carcinomaSubgroup and stratification analysis of the seven-CpG-based signature. Subgroup analysis for HPV+ cases (a) and HPV− cases (b) in the imputed combined dataset. c Kaplan-Meier curves plotting overall survival of the combined three datasets for respective prognostic score categories. d Subgroup analysis with clinical stage of the combined training set and validation set 2Back to article page