SLC2A1 and neoplasm: In addition, GLUT-1 overexpression was also associated with tumor size (n = 5, OR = 3.36, 95%CI: 2.04–5.51, P < 0.001; Fig. 2C), lymph node metastasis (n = 5, OR = 3.15, 95%CI: 1.89–5.25, P < 0.001; Fig. 2D), tobacco use (n = 3, OR = 2.18, 95%CI: 1.18–4.01, P = 0.013; Fig. 2E), and distant metastasis (n = 2, OR = 3.06, 95%CI: 1.19–7.9, P = 0.02; Fig. 2F).