Figure 2. Forest plots investigating the association between sirtuin 1 (SIRT1) expression and clinicopathological features in esophageal squamous cell carcinoma. A: Gender (male vs. female); B: tumor depth (T1+T2 vs. T3+T4); C: lymph node metastasis (negative vs. positive); D: TNM stage (I+II vs. III+IV); E: tumor differentiation (G1+G2 vs. G3). CI: Confidence interval.
