RAB7A and neoplasm: Thereafter, factors impacting OS were assessed using univariate Cox proportional hazards regression, and RAB7A (high vs. low, P = 0.008) was found to be a predictor of worse OS, as were radiation therapy (yes vs. no, P = 0.013), histologic grade (G1&G2 vs. G3&G4, P = 0.052) and residual tumour (R0 vs. R1&R2, P = 0.028) (Table 1).