E2F4 and gastric cancer: High E2F4 mRNA levels were significantly correlated with unfavourable OS in all GC patients, intestinal GC patients and diffuse GC patients, HR = 1.98 (1.65–2.37), P=4 × 10−14 (Figure 4A), HR = 3.02 (2.19–4.17), P=2 × 10−12 (Figure 4B), HR = 1.56 (1.1–2.2), P=0.011 (Figure 4C) respectively.