Table 2.

CD22 expression levels and clinical parameters in ESCC tissues (n = 87)

Clinical parameters	CD22
	Total		Expression				P-value
	n	%	Negative		Positive
			n	%	n	%
Total number	87	100.00	17	19.54	70	80.46
Sex							1.000
Female	20	22.99	4	20.00	16	80.00
Male	67	77.01	13	19.40	54	80.60
Age							0.592
≤ 59	41	47.13	9	21.95	32	78.05
≥ 60	46	52.87	8	17.39	38	82.61
Depth of tumor invasion							0.137
pT1–pT2	14	16.09	5	35.71	9	64.29
pT3–pT4	73	83.91	12	16.44	61	83.56
Lymph node metastasis							0.008
Negative	32	36.78	11	34.38	21	65.63
Positive	55	63.22	6	10.91	49	89.09
Clinical stage							0.546
I–II	24	27.59	6	25.00	18	75.00
III–IV	63	72.41	11	17.46	52	82.54