Table 1. Study keywords in search strategy.

#1 Helicobacter pylori[MeSH Terms]) OR ("Helicobacter pylori"[Title/Abstract] OR "H. pylori"[Title/Abstract] OR "Campylobacter pylori"[Title/Abstract] OR Hp[Title/Abstract]

#2 (Obesity[MeSH Terms]) OR (obesity[Title/Abstract] OR obese[Title/Abstract] OR adiposity[Title/Abstract] OR adipose[Title/Abstract] OR overweight[Title/Abstract] OR fatness[Title/Abstract] OR BMI[Title/Abstract] OR "body mass index"[Title/Abstract] OR "weight gain"[Title/Abstract] OR "weight loss"[Title/Abstract] OR "Body weight"[Title/Abstract] OR "body weight changes"[Title/Abstract] OR "over weight"[Title/Abstract])

#3 ((China[MeSH Terms]) OR China[Title/Abstract]) OR Chinese[Title/Abstract]

#1 AND #2 AND #3