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Table 2 Association of each variable with EGFR mutation

From: Detection of epidermal growth factor receptor mutations in formalin fixed paraffin embedded biopsies in Malaysian non-small cell lung cancer patients

Characteristics No. EGFR mutation No. (%) P
Patients 484 221 (45.7)  
Gender    
 Male 253 81 (32.0) <0.001
 Female 231 140 (60.6)  
 Missing data 0   
Age, yr    
 ≤ 60 244 119 (48.8) 0.163
 > 60 238 101 (42.4)  
 Median 60   
 Range 21–92   
 Missing data 2   
Ethnicity    
 Chinese 293 136 (46.4) 0.747
 Malay 143 62 (43.4)  
 Indian 26 15 (57.7)  
 Others 7 2 (28.6)  
 Missing data 15 6 (40.0)  
Stage    
 I/ II 5 1 (20.0) 0.385
 III/ IV 72 33 (45.8)  
 Not specified 348 160 (46.0)  
 Missing data 59   
Histological type    
 Adenocarcinoma 467 220(47.1) 0.004
 Squamous cell carcinoma 12 1 (8.3)  
 Large cell carcinoma 3 0 (0)  
 Others 2 0 (0)  
 Missing data 0   
Degree of differentiation    
 Well differentiated 2 2 (100) 0.074
 Moderately differentiated 42 20 (47.6)  
 Poorly differentiated 33 10 (30.3)  
 Undifferentiated 1 0 (0)  
 Not specified 41 21 (51.2)  
 Missing data 365   
Smoking history    
 Current 10 5 (50.0) 0.191
 Former 3 1 (33.3)  
 Never 25 17 (68.0)  
 Missing data 446 198 (44.4)