MIAT and gastric cancer: The multivariate analysis showed that serum exosomal MIAT expression (HR = 3.46, 95% CI = 1.46‐5.69, P = .007), differentiation (HR = 2.73, 95%CI = 1.25‐4.47, P = .014), lymphatic metastasis (HR = 3.12, 95%CI = 1.37‐5.18, P = .011), and TNM stage (HR = 4.07, 95%CI = 1.62‐6.72, P = .002) were independent prognostic factors for GC (Table 2).