CRABP2 and esophageal squamous cell carcinoma: Additionally, the differentiation of degree (p = 0.018), AJCC stage (p = 0.013), lymph node metastasis (p = 0.067), hematogenous metastasis (p = 0.094), and CRABP2 expression (p = 0.152) were the risk factors for PFS of patients with ESCC (Table 5).