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Table 1 Baseline characteristics of cases and controls according to sex

From: Association between ALDH2 polymorphism and esophageal cancer risk in South Koreans: a case-control study

  Men Women
Case (N = 751) Control (N = 3477) P-value Case (N = 32) Control (N = 5255) P-value
Age 66.9 ± 7.9 66.0 ± 8.0 0.007 70.7 ± 9.3 64.5 ± 8.2 < 0.001
Current drinker 430 (57.3) 2203 (63.4) 0.002 6 (18.8) 997 (19.0) 1.000
Ever-smoker 556 (74.0) 2576 (74.1) 1.000 3 (9.4) 190 (3.6) 0.110
Histologic type
Squamous cell carcinoma 716 (95.3)    27 (84.4)   
Adenocarcinoma 18 (2.4)    3 (9.4)   
Other 17 (2.3)    2 (6.2)   
  1. All values are given as N (%) or mean ± standard deviation
  2. P-values were calculated by Student’s t-test or chi-square test
  3. P-values were calculated by Fisher’s exact test