DAPK1 and gastric cancer: DAPK1 methylation was positively correlated with the lymph node (N) stage (positive vs. negative, OR = 1.45, 95%CI: 1.01–2.06, P = 0.04, fixed effects model) and poor differentiation (OR = 1.55, 95%CI: 1.02–2.35, P = 0.04, fixed effects model) in gastric cancer, and the association was significant among Asian patients.