SERPINE1 and gastric adenocarcinoma: In the multivariate Cox regression analysis of CCDC144NL-AS1 and SERPINE1, age (CCDC144NL-AS1: HR = 1.822, p = 0.001; SERPINE1: HR = 1.735, p = 0.004), M stage (CCDC144NL-AS1: HR = 2.316, p = 0.008; SERPINE1: HR = 2.287, p = 0.011), CCDC144NL-AS1high expression (HR = 1.794, p = 0.001) and SERPINE1high expression (HR = 1.722, p = 0.003) were closely associated with OS in STAD patients (Figure 6).