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Table 1 Characteristics of a training set of stage I NSCLC patients and smokers with benign pulmonary nodules

From: Integrating DNA methylation and microRNA biomarkers in sputum for lung cancer detection

  NSCLC cases (n = 117) Controls (n = 174) P value
Age 66.53 (SD 10.98) 65.36 (SD 10.15) 0.34
Sex    0.36
 Male 93 138  
 Female 24 36  
Pack-years 45.83 (range, 6–148) 44.67 (range, 5–115) 0.34
FEV1/FVC 0.48–0.73 0.44–0.67 0.12
Nodule size (cm) 3.23 (SD, 1.62) 2.25 (SD, 1.04) <0.01
Stage, all are stage I    
Histological type    
Adenocarcinoma (AC) 63   
Squamous cell carcinoma (SCC) 54   
  1. Abbreviations: NSCLC non-small cell lung cancer, SD standard derivation, FEV1/FVC forced expiratory volume in 1 s/forced vital capacity