Percutaneous microwave ablation and transcatheter arterial chemoembolization for serum tumor markers and prognostics of middle-late primary hepatic carcinoma

Figure 1 Survival curves for the single and combined groups. The survival rate of the two groups was compared by log-rank test. The survival rate of the single group was significantly lower than that of the combined group (log-rank χ² = 7.503, P = 0.006).