Prognostic and clinicopathological features of E-cadherin, α-catenin, β-catenin, γ-catenin and cyclin D1 expression in human esophageal squamous cell carcinoma

Table 1 Background data of patients

Term	No. of cases (%)
Total	62
Age (yr)
< 50	22 (35.5)
≥ 50	40 (64.5)
Sex
Male	49 (79.1)
Female	13 (20.9)
Location
Upper thoracic	3 (4.8)
Middle thoracic	36 (56.5)
Lower thoracic	23 (37.1)
Histological grade
I	16 (25.8)
II	35 (56.5)
III	11 (17.7)
Depth of invasion
T1	2 (3.2)
T2	10 (16.1)
T3	32 (51.6)
T4	18 (29)
Lymph node metastasis
Positive	35 (56.5)
Negative	27 (43.5)