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Table 1 Distributions of select characteristics in cases and control subjects

From: XAB2 tagSNPs contribute to non-small cell lung cancer susceptibility in Chinese population

Variables Cases (n = 470) Controls (n = 470) P valuea
No (%) No (%)
Gender      0.832
 Male 324 68.9 328 69.8  
 Female 146 31.1 142 30.2  
Age      0.470
 <50 84 17.9 96 20.4  
 50–59 177 37.7 187 39.8  
 60–69 129 27.4 111 23.6  
 ≥70 80 17.0 76 16.2  
Smoking status      0.321
 Non-smoker 265 56.4 281 59.8  
 Ever-smoker 205 43.6 189 40.2  
Pack-year smoked      0.001
 <25 75 36.6 96 50.8  
 ≥25 130 63.4 93 49.2  
  1. atwo-side χ2 test