highly significantP-value= 0.05
Although the univariate cox regression did not show a significant increase in recurrence risk with higher washout rate at the tumor’s periphery (HR= 0.99; 95% CI= 0.95-1.04; P-value= 0.05), the multivariate model showed a highly significant association with recurrence risk (HR= 9.08; 95% CI= 8.44-9.76; P-value= 0.05).