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Table 4 Characteristics of the patients and controls.

From: Association of IL-1beta gene polymorphism with cachexia from locally advanced gastric cancer

   Cancer (n = 214) Contr. (n = 230) P
Sex (M/F) 127/87 140/90 0.743
Age (year) 56.4 ± 14.3 55.0 ± 13.5 0.280
Smoking status never 85 (39.7%) 95 (41.3%) 0.714
  Ex- 32 (15.0%) 39 (17.0%)  
  current 97 (45.3%) 96 (41.7%)  
Helicobacter pylori infection 125 (58.4%) *124 (59.9%) 0.756
Poor drinking water (well water) 31 (14.5%) 22 (9.6%) 0.110
  1. * Twenty-three controls missed. No significant association was found between the frequency of smoking status, poor drinking water status and Helicobacter pylori infection. The two groups were matched for age and sex.