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Table 1 Selected characteristics of participants according to NSCLC

From: Discovery of prognostic biomarkers for predicting lung cancer metastasis using microarray and survival data

Characteristics Number (N = 78) % Metastasis p a
+ -
Age       
  65 49 63 25 24 0.64
  <65 29 37 17 12  
Sex       
  Male 56 72 28 28 0.32
  Female 22 28 14 8  
Smoking index      
  20 pack-year 35 45 17 18 0.49
  <20 pack-year 43 55 25 18  
Histologic type      
  Squamous cell 25 32 11 14 0.46b
  Adenocarcinoma 46 59 25 21  
  Large cell 5 6 4 1  
  Other cell type 2 3 2 0  
Differentiation      
  Well 5 6 1 4  
  Moderate 51 65 28 23 0.80b
  Poor 22 28 13 9  
Tumor size       
  5 cm 18 23 11 7 0.59
  <5 cm 59 76 31 28  
pN status       
  Positive 54 69 25 29 0.09
  Negative 25 32 17 7  
pM status       
  Positive 5 6 5 0 0.20
  Negative 73 94 37 36  
Pathologic stage      
  Stage I 36 46 10 26 3.0E-5c
  Stage II 11 14 7 4  
  Stage III 26 33 20 6  
  Stage IV 5 6 5 0  
  1. aThe two-sided p-values were calculated by Fisher's exact test.
  2. bThe p-values were calculated using the two variables with the largest numbers of patients.
  3. cThe p-value was calculated to measure the association between two variables (Stage I and Stages II, III and IV).