XIST and digestive system neoplasm: The OS of tumor patients with high expression of lncRNA XIST in digestive system tumors was lower than that in low expression group (HR = 1.67, 95% CI 1.11–2.51, p = 0.014), but not statistically significant in other tumors (HR = 1.39, 95% CI 0.71–2.74, p = 0.339) (Table 2).