EBV: Epstein-Barr virus; T+: detected in tumors; P+: detected in PBMCs; HER-2: human epidermal growth factor receptor 2.
The hazard function for the model with EBV variables reads as:
The relative risk (RR) >1 corresponds to a negative effect, i.e. a decrease in patient survival, while an RR <1 corresponds to a positive effect, i.e. an increase in patient survival. “95% CI” stands for the confidence interval at 95%. The variable “Grade” includes all grades.