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Table 1 Frequency distribution of select characteristics

From: TNFSF15 promoter polymorphisms increase the susceptibility to small cell lung cancer: a case-control study

Variables NSCLC SCLC
Case (n = 340) Controls(n = 460) P value* Case (n = 209) Controls(n = 460) P value*
No (%) No (%)   No (%) No (%)  
Gender   0.301    0.862
 Male 237 69.7 336 73.0   154 73.7 336 73.0  
 Female 103 30.3 124 27.0   55 26.3 124 27.0  
Age   0.139    0.151
 <60 187 55.0 277 60.2   138 66.0 277 60.2  
  ≥ 60 153 45.0 183 39.8   71 34.0 183 39.8  
Range 27–84 18–84   30–92 18–84  
Median 58 56.2   55 56.2  
Smoking status   0.252    0.431
 Non-smoker 187 55.0 233 50.7   99 47.8 233 50.7  
 Smoker 153 45.0 227 49.3   110 52.2 227 49.3  
Pack year of smoking   < 0.001    < 0.001
 <30 59 38.6 153 67.4   37 33.7 153 67.4  
  ≥ 30 94 61.4 74 32.6   73 66.4 74 32.6  
  1. *Two-sided χ2 test