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Table 2 Characteristics of a testing 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 = 144) Controls (n = 171) P value
Age 66.32 (SD 12.68) 65.23 (SD 10.15) 0.33
Sex    0.39
 Male 114 135  
 Female 30 36  
Pack-years 44.38 (range, 6–169) 43.26 (range, 5–119) 0.35
FEV1/FVC 0.47–0.53 0.43–0.84 0.08
Nodule size (cm) 3.26 (SD, 1.38) 2.17 (SD, 0.98) <0.01
Stage, all are stage I    
Histological type    
Adenocarcinoma (AC) 78   
Squamous cell carcinoma (SCC) 66   
  1. Abbreviations: NSCLC non-small cell lung cancer, SD standard derivation, FEV1/FVC forced expiratory volume in 1 s/forced vital capacity