Table 1 Demographic characteristics, tobacco use, alcohol consumption, Helicobacter pylori seropositivity and serum pepsinogen concentrations in cases and the subcohort of the Linxian General Population Nutrition Intervention Trial cohort
CharacteristicSubcohort (n = 974)Gastric non-cardia adenocarcinoma (n = 330)Gastric cardia adenocarcinoma (n = 546)Oesophageal squamous cell carcinoma (n = 323)
Age, in years, median (IQR)52 (44 to 59)57 (50 to 62)56 (50 to 62)56 (48 to 61)
Males, n (%)443 (45.5)216 (65.5)326 (59.7)147 (45.5)
Tobacco smokers, number (%)*326 (33.5)154 (46.7)224 (41.0)105 (32.5)
Alcohol drinkers, number (%)†236 (24.2)78 (23.6)136 (24.9)63 (19.5)
BMI (kg/m2), median (IQR)22 (20 to 23)21 (20 to 23)22 (20 to 23)21 (20 to 23)
H pylori seropositive, number (%)713 (73.2)265 (80.3)445 (81.5)245 (75.9)
Pepsinogen I, μg/l, median (IQR)118 (87 to 152)119 (85 to 149)121 (96 to 152)118 (85 to 150)
Pepsinogen II, μg/l, median (IQR)17 (16 to 23)18 (10 to 27)18 (10 to 26)15 (7.0 to 24)
Pepsinogen I:II ratio, median (IQR)8.6 (5.9 to 13)6.6 (4.6 to 11)6.8 (5.0 to 11)8.8 (5.7 to 14)
  • *Ever smoking cigarettes for 6 or more months. †Ever drinking any alcoholic beverage in the last 12 months.

  • BMI, body mass index; IQR, interquartile range.