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Table 2 Distribution of ABO blood types in control subjects by study

From: ABO genotypes and the risk of esophageal and gastric cancers

Study Blood Type P
O A B AB
Overall 889 (33.0%) 725 (26.9%) 853 (31.6%) 229 (8.49%) 0.004
Linxian Nutrition Intervention Triala 133 (29.7%) 106 (23.7%) 160 (35.7%) 49 (10.9%)  
Shanxi Case-Control Studyb 555 (33.5%) 430 (26.0%) 535 (32.3%) 135 (8.16%)  
Singapore Chinese Health Studyc 57 (41.9%) 38 (27.9%) 35 (25.7%) 6 (4.41%)  
Shanghai Men’s Health Studyd 73 (34.3%) 67 (31.5%) 56 (26.3%) 17 (7.98%)  
Shanghai Women’s Health Studye 71 (29.1%) 84 (34.4%) 67 (27.5%) 22 (9.02%)  
  1. aThe Linxian General Population Nutrition Intervention Trial was a large-scale, randomized, double-blind, primary prevention trial in Linxian, China
  2. bThe Shanxi Case-Control study was a neighborhood matched case-control study conducted in Shanxi, China
  3. cThe Singapore Chinese Health Study was large-scale cohort study of diet and health in Chinese men and women aged 45–74 years in Singapore
  4. dThe Shanghai Men’s Health Study was a population-based cohort study of men aged 40–74 years, living in urban Shanghai, China
  5. eThe Shanghai Women’s Health Study was a population-based cohort study of men aged 40–74 years, living in urban Shanghai, China