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Table 1 Characteristics of Lung Cancer Patients and Controls

From: Genetic polymorphism rs3760396 of the chemokine (C-C motif) ligand 2 gene (CCL2) associated with the susceptibility of lung cancer in a pathological subtype-specific manner in Han-ancestry Chinese: a case control study

Variable Cases Controls P valuea
Numbers 394 545  
Sex    0.012
 Male 234 367  
 Female 160 178  
Age (year) 58.1 ± 9.4 52.3 ± 10.5 < 0.0001
Han Ethnicities 394 545  
Smoking status    
 Non-smokers 205 405 < 0.001
 Smokers 189 140  
Histological type    
 Squamous carcinomas 142 NA  
 Adenocarcinomas 221 NA  
 Adenosquamous carcinomas 20 NA  
 Small cell carcinomas 10 NA  
 Large cell carcinomas 1 NA  
TNM stages    
 IA 10 NA  
 IB 27 NA  
 IIA 33 NA  
 IIB 108 NA  
 IIIA 73 NA  
 IIIB 79 NA  
 IV 63 NA  
not classified 1 NA  
  1. aTwo-sided χ2 test