SERPINE1 and gastric adenocarcinoma: Next, a risk score was assigned to each STAD patient in the TCGA database using the following formula (LASSO Cox regression coefficient * mRNA expression level): Risk score = 0.030 * ZFP36 + 0.024 * DUSP1 + 0.16 * SERPINE1 + 0.016 * CAV1 + 0.068 * AKAP12.