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Table 4 Risk factors for lymph node metastasis in validation cohort

From: A nomogram to predict lymph node metastasis risk for early esophageal squamous cell carcinoma

Variables LNM P value Logistic regression analysis P value
Negative (%) Positive (%) OR 95%CI
Sex    1.000
 Male 58 (84.1) 11 (15.9)    
 Female 9 (81.8) 2 (18.2)    
Age    0.083
 <  60 years 24 (75.0) 8 (25.0)    
 > = 60 years 43 (89.6) 5 (10.4)    
Tumor location    0.131
 Upper 6 (85.7) 1 (14.3)    
 Middle 38 (77.6) 11 (22.2)    
 Lower 23 (95.8) 1 (4.2)    
Tumor number    0.450
 Single 60 (84.5) 11 (15.5)    
 Mutifocal 7 (77.8) 2 (22.2)    
Tumor size    0.014 2.674 1.876–6.320 0.008
 <  2.5 cm 46 (85.2) 4 (14.8)    
 > = 2.5 cm 21 (80.8) 9 (19.2)    
Differentiation    0.008 3.902 1.843–10.354 0.005
 High-middle 58 (89.2) 7 (11.8)    
 Low 9 (60.0) 6 (40.0)    
Depth of invasion    0.012 3.234 1.230–8.543 0.010
 T1a 30 (96.8) 1 (3.2)    
 T1b 37 (75.5) 12 (24.5)