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Table 1 The characteristics of cases and controls

From: Oolong tea consumption and its interactions with a novel composite index on esophageal squamous cell carcinoma

VariablesControls [n(%)]Cases [n(%)]χ2P
Sex  0.0001.000
 male433(67.0)433(67.0)  
 female213(33.0)213(33.0)  
Age  3.8020.149
  < 5087(13.5)97(15.0)  
 50~60233(36.1)258(39.9)  
  ≥ 60326(50.5)291(45.0)  
Education Level  101.492< 0.001
  ≤ Primary281(44.7)462(72.6)  
  ≥ Junior347(55.3)174(27.4)  
Household income (yuan)  120.587< 0.001
  <  2000/month305(49.8)493(79.6)  
  ≥ 2000/month308(50.2)126(20.4)  
Ever smoking  14.984< 0.001
 No300(47.5)236(36.8)  
 Yes332(52.5)406(63.2)  
Ever drinking  18.166< 0.001
 No428(67.8)361(56.2)  
 Yes203(32.2)281(43.8)  
Hot food  86.588< 0.001
 No367(58.0)205(32.0)  
 Yes266(42.0)435(68.0)  
Hard food  39.041< 0.001
 No314(49.8)207(32.5)  
 Yes317(50.2)430(67.5)  
Pickled food  39.799< 0.001
  < 5times/week333(52.6)224(35.1)  
  ≥ 5times/week300(47.4)415(64.9)  
Fried food  0.6070.436
  < 5times/week452(71.6)445(69,6)  
  ≥ 5times/week179(28.4)179(30.4)  
Fruits  66.239< 0.001
  ≥ 5times/week399(63.1)259(40.3)  
  < 5times/week233(36.9)283(59.7)