ALB and Lymphatic Metastasis: Specifically speaking, mid- and low-thoracic tumor (aHR = 2.20, 95% CI = 1.03, 4.72), abdominal and retroperitoneal lymph node metastasis (aHR = 1.62, 95% CI = 1.00, 2.64) and low albumin (aHR = 2.81, 95% CI = 1.24, 6.41) were statistically significantly related to lower survival; while lymphatic metastasis (aHR = 2.36, 95% CI = 0.93, 5.98) and distant metastasis (aHR = 1.61, 95% CI = 0.97, 2.69) were marginally significant.