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Table 1 .Overall clinic-pathologic characteristics for the study subjects.

From: Validity of upfront surgery for patients with unsuspected lymph node metastasis in esophageal cancer: a propensity scoring matching study

Variables WL (N = 160) UL(N = 55) P- value
Age (year) 63.5(±9.1) 60.7 (±6.7) 0.014
Sex Male 144 55 0.014
Female 16 0
Preoperative T stage 1 95 23 0.001
2 50 11
3 15 21
Postoperative T stage 1a 48 3 < 0.001
1b 68 13
2 19 21
3 25 18
Location of cancer Upper thoracic 22 3 0.254
Middle thoracic 78 31
Lower thoracic 60 21
Method of surgery Ivor Lewis 148 45 0.080
McKeown 114 10
Differentiation Well 24 3 0.351
Moderate 109 52
Poor 27 0
Neoadjuvant therapy No 136 26 < 0.001
Yes 24 29