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Table 1 General information of esophageal cancer group and control group

From: Single nucleotide polymorphism at alcohol dehydrogenase-1B is associated with risk of esophageal squamous cell carcinoma

  Esophageal cancer (n = 1001) No. (%) Health control (n = 1391) No. (%) P*
Sex    0.69
 Male 795 (79.42) 1114 (80.09)  
 Female 206 (20.58) 277 (19.91)  
Age (years)    0.46
 40 30 (3.00) 47 (3.38)  
 41-60 539 (53.84) 778 (55.93)  
 >60 432 (43.16) 566 (40.69)  
Smoking status    2.14 × 10-11
 Non-smoker 337 (33.66) 651 (46.80)  
 Smoker 632 (63.14) 684 (49.17)  
Unclear situation 32 (3.20) 56 (4.03)  
  1. *Two-sided χ2 test.