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Table 1 The selected characteristics between laryngeal carcinoma cases and controls used for association study

From: NBS1 rs2735383 polymorphism is associated with an increased risk of laryngeal carcinoma

  Cases(n = 342) Controls(n = 345) P a
N (%) N (%)
Sex
 Male 333(97.368) 334(96.812) 0.664
 Female 9(2.632) 11(3.188)  
Age(years)
 <30 1(0.292) 2(0.580) 0.864
 30–59 150(43.860) 154(44.638)  
 60–89 191(55.848) 188(54.492)  
  ≥ 90 0(0.000) 1(0.290)  
Ethnicity
 Han 231(67.544) 238(68.986) 0.685
 Zhuang 111(32.456) 107(31.014)  
Smoking status
 ever 223(65.205) 196(56.812) 0.024
 never 119(34.795) 149(43.188)  
Drinking status
 ever 176(51.462) 100(28.986) 0.000
 never 166(48.538) 245(71.014)  
Classification of diagnosis
 poorly differentiated squamous cell carcinoma 37(10.819)   
 Moderately differentiated squamous cell carcinoma 63(18.421)   
 well-differentiated squamous cell carcinoma 76(22.222)   
 Unknown 166(48.538)   
  1. aA χ2 test for differences in selected characteristics between cases and controls