Table 3. Multivariate analysis of risk factors for gastric precancerous lesion. RR relative risk; CI confidence interval.

Risk factors	p	RR (95%CI)
H. pylori infection High serum midkine level Heavy alcohol drinker Family history of gastric cancer Age ≥50 years	<0.001* 0.002* 0.011* 0.046* 0.250	9.14 (3.46 – 18.75) 7.57(2.6 – 16.45) 4.05 (1.92 – 11.06) 4.0 (1.80 – 9.37) 2.58 (0.89 – 6.65)