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Table 1 Demographic information of the subjects

From: Genetic polymorphisms of NAMPT related with susceptibility to esophageal Squamous cell carcinoma

Characteristics Cases (n = 405) Controls (n = 405) P
n % n %
Age (year; mean ± SD) 60.89 ± 7.83 60.93 ± 7.91 0.87a
Gender      
 Male 240 59.26 240 59.26 -
 Female 165 40.74 165 40.74
Tobacco smoking      
 Ever 183 45.19 171 42.22 0.43b
 Never 222 54.81 234 57.78
Alcohol consumption      
 Ever 117 28.89 96 23.70 0.11b
 Never 288 71.11 309 76.30
  1. aMann–Whitney U test.
  2. bMcNemar test.