Table 2 Patient Demographics and Tumor Characteristics of the Validation Group.

From: Surgically Resected Esophageal Squamous Cell Carcinoma: Patient Survival and Clinicopathological Prognostic Factors

Characteristics

Group

Validation

Original

p- values*

Sex

  

0.846

   Male

105

403

 

   Female

9

32

 

Mean age (yrs)**

64

64

0.387

   (min–max)

(31–90)

(31–90)

 

Pathologic T stage

  

0.182

   Tis + T1a

29

131

 

   T1b

72

234

 

   T2

13

70

 

Tumor length (cm)

2.35

2.36

0.195

   (Q1–Q3)

(1.50–3.00)

(1.50–3.00)

 

Tumor differentiation

  

0.007

   G1

5

68

 

   G2

93

308

 

   G3

16

59

 

Adjuvant Tx

  

0.969

   Yes

20

77

 

   No

94

358

 

R0 resection

  

0.966

   Yes

113

431

 

   N0

1

4

 

Tumor Locations

  

0.298

   Cervical

1

1

 

   Upper thoracic

12

35

 

   Mid thoracic

50

169

 

   Lower thoracic

36

189

 

   Upper to mid thoracic†

4

9

 

   Mid to lower thoracic†

10

28

 

   Upper to lower thoracic†

1

2

 

   Upper and lower thoracic††

0

2

 

Nodal metastasis

  

0.481

   No

82

298

 

   Yes

32

137

 

Total

114

435

 
  1. Note. __ *Calculated using the Chi-square test, Q = quartile (Q1–25 percent quartile, Q3–75 percent quartile); G1 = well-differentiated, G2 = moderately differentiated, G3 = poorly differentiated; Definition of the tumor location; Cervical = superior to the thoracic inlet, Upper thoracic = from the thoracic inlet to the azygos arch, Middle thoracic = from the azygos arch to the inferior pulmonary veins, Lower thoracic = from the inferior pulmonary veins to the esophagogastric junction; Upper to middle thoracic† = long segment involvement from the upper to middle esophagus, Mid to lower thoracic† = long segment involvement from the middle to lower esophagus, Upper to lower thoracic† = long segment involvement from the upper to lower esophagus; Upper and lower thoracic†† = the upper and lower thoracic esophagus skipping the middle thoracic esophagus.
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