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Table 1 Association between DDR1 expression and clinicopathologic features in patients with PDAC

From: High expression of DDR1 is associated with the poor prognosis in Chinese patients with pancreatic ductal adenocarcinoma

   DDR1 Expression  
Characteristics   High Low P value
  Total (n = 126) (n = 79) (χ2 test)
Age (years)     
 Mean (years) 65.19 66.82 62.69 0.374
  < 65 107 65 42 0.826
  ≥ 65 98 61 37  
Gender     0.891
 Male 117 74 43  
 Female 88 52 36  
Tumor location     0.273
 Head 139 89 50  
 Body/tail 66 37 29  
Size     0.551
  ≤ 2 cm 27 18 9  
  > 2 cm 178 108 70  
Tumor differentiation     0.054
 Well 11 10 1  
 Moderate/poor 194 116 78  
T classification     0.697
 T1 11 8 3  
 T2 31 18 13  
 T3 125 73 52  
 T4 38 20 18  
N classification     0.858
 Absent 136 83 53  
 Present 69 43 26  
AJCC stage     0.949
 Stage I 38 20 18  
 Stage II 135 73 62  
 Stage III 21 10 11  
 Stage IV 14 7 7  
Liver metastasis     0.560
 Absent 191 118 73  
 Present 14 8 6  
Vascular invasion     0.801
 Absent 177 109 68  
 Present 28 17 11  
Vital status     0.912
 Dead 172 106 66  
 Alive 33 20 13  
  1. AJCC staging is according to the 7th edition of the American Joint Committee on Cancer (AJCC) staging system [29]