The pooled HRs were recalculated after excluding each single cohort successively, and the results indicated that the HR of high TUG1 expression on OS ranged from 1.67 (95% CI: 1.47-1.91) to 1.75 (95% CI: 1.53-2.01) (Figure 5(a)), and the HR of high TUG1 expression on PFS/DFS/RFS/EFS ranged from 1.51 (95% CI: 1.06-2.16) to 1.77 (95% CI: 1.31-2.38) (Figure 5(b)), suggesting that a positive association between high TUG1 level and the prognosis of cancer patients existed no matter which study was removed. Here, TUG1 is linked to cancer.