CLDN1 and neoplasm: CTTN overexpression (βadj. = 0.253, P < 0.05), CLDN-1 (βadj. = 0.345, P < 0.01), and CLDN-4 (βadj. = 0.338, P < 0.01) were significantly correlated to the larger tumor dimension in the models adjusted for potential covariates.