Further, a single-factor analysis of the clinical indicators between the two groups showed statistically significant differences in the portal vein width, D-2 polymer, ALB, and Hb between the two groups (P < 0.05), suggesting that they may have a merged influence on the development of gastrointestinal hemorrhage and cerebral infarction (Table 4). The gene discussed is GSTM1; the disease is Gastrointestinal hemorrhage.