In addition, ROC analysis comparing 129 patients with GC with 55 gastritis patients showed that STARD4-AS1 had an AUC of 0.758 (95% CI, 0.687–0.829), was higher than that of CEA (0.726, 95% CI: 0.652–0.800), CA199 (0.744, 95% CI: 0.671–0.816), and CA724 (0.703, 95% CI: 0.625–0.782) (Figure 3d). The gene discussed is CEACAM5; the disease is gastric cancer.