Fig. 1

Nomogram for predicting HP infection. The alcohol consumption axis, 0: no; 1: yes; The family history of gastric cancer axis, 0: no; 1: yes; The live with an HP-positive individual axis, 0: no; 1: yes; The using serving chopsticks axis, 0: no; 1: yes; The drinking tea > 3 times per day axis, 0: no; 1: yes; The hot tea axis, 0: no; 1: yes; The infection status of co-drinkers unknown axis, 0: no; 1: yes; HP, Helicobacter pylori