Table 1 Cox regression analysis for factors possibly influencing disease-specific survival in patients with ESCC in our cohort

WDR66 (high vs low)

2.644

Gender (male vs female)

1.15

Age, y (<60 vs ≥60)

1.46

Tumor differentiation (high grade vs low or Intermediate grade)

2.763

pT factor ( pT3 or pT4 vs pT1 or pT2)

2.133

Lymph node metastasis (yes vs no)

1.575

Distant metastasis (yes vs no)

1.376

TNM stage (I or II vs III or IV)

7.711