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Table 4 Univariate analyses for disease-specific survival and local recurrence-free survival rates

From: Endoscopic resection as an independent predictive factor of local control in patients with T1bN0M0 esophageal squamous cell carcinoma treated with chemoradiotherapy: a retrospective study

Variables Number 5-year DSS (%) p value 5-year LRFS (%) p value
Age, years
 < 70 43 92.9 0.059 91.8 0.140
 ≥ 70 48 74.5   82.8  
Gender
 Male 77 81.3 0.094 89.3 0.899
 Female 14 100.0   78.8  
Performance status
 0 86 87.3 0.001* 87.0 0.498
 ≥ 1 5 40.0   100.0  
Tumor location
 Upper thoracic 10 75.0 0.829 77.1 0.567
 Middle thoracic 54 85.5   90.9  
 Lower thoracic 27 87.4   90.9  
Tumor length
 < 3 cm 46 91.9 0.111 97.4 0.012*
 ≥ 3 cm 45 76.3   76.7  
Circumference of tumor
 < 3/4 73 85.5 0.681 89.6 0.131
 ≥ 3/4 18 80.1   79.1  
Multiple lesion
 No 77 85.2 0.757 87.2 0.824
 Yes 14 79.6   92.3  
Endoscopic resection
 No 28 72.1 0.045* 74.7 < 0.001*
 Yes 63 89.2   93.2  
RT field
 IFI 13 66.7 0.058 92.3 0.649
 ENI 78 86.9   87.1  
Radiation dose
 < 50 Gy 23 81.5 0.857 89.1 0.400
 ≥ 50 Gy 68 85.2   86.3  
  1. DSS disease-specific survival, LRFS local recurrence-free survival, RT radiotherapy, IFI involved field irradiation, ENI elective nodal irradiation
  2. *p < 0.05