RBP1 and neoplasm: The results showed that the expression levels of CRBP-1 significantly correlated with multiple variables, including the differentiation state (P = 0.003), N classification (P = 0.048), clinical stage (P = 0.048) and death (P = 0.006), but not with age (P = 0.685), gender (P = 0.327), tumor size (P = 0.795), T classification (P = 0.795) and M classification (P = 1.000).