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Table 1 Characteristics by imputed ABO blood typesa in 2696 control subjects

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

Characteristic Blood Type P
O A B AB
N (%) 889 (33.0%) 725 (26.9%) 853 (31.6%) 229 (8.5%)  
Age, years      0.77
 < 50, N (%) 193 (21.7%) 174 (24.0%) 200 (23.4%) 48 (21.0%)  
 50–59, N (%) 307 (34.5%) 224 (30.9%) 278 (32.6%) 84 (36.7%)  
 ≥ 60, N (%) 389 (43.8%) 327 (45.1%) 375 (44.0%) 97 (42.2%)  
Sex      0.13
 Female, N (%) 299 (33.6%) 261 (36.0%) 330 (38.7%) 76 (33.2%)  
 Male, N (%) 590 (66.4%) 464 (64.0%) 523 (61.3%) 153 (66.8%)  
Tobacco smoking      0.82
 Never smoking, N (%) 438 (49.3%) 369 (50.9%) 427 (50.1%) 109 (47.6%)  
 Ever smoking, N (%) 451 (50.7%) 356 (49.1%) 426 (49.9%) 120 (52.4%)  
Alcohol drinking      0.77
 Never drinking, N (%) 745 (83.8%) 595 (82.1%) 701 (82.2%) 189 (82.5%)  
 Ever drinking, N (%) 144 (16.2%) 130 (17.9%) 152 (17.8%) 40 (17.5%)  
  1. aBlood types imputed from genotype data at rs505922, rs8176746, and rs574347