Table 2. Summarized data of clinical and pathological parameters from the eligible studies.

First author		Gender				Tumor differentiation				Tumor size				Lymph node metastasis				Distant metastasis				Clinical stage
		Male		Female		Poor+Moderate/ undifferentiated		Well/differentiated		T3–4		T1–2		Yes		No		Yes		No		III-IV		I-II
	TrkB+	-	+	-	+	-	+	-	+	-	+	-	+	-	+	-	+	-	+	-	+	-	+	-
Tanaka K [16]		50	181	17	72	24	143	43	110	47	129	20	124	43	119	24	134	6	11	61	242	37	94	30	159
Fan M [19]		49	52	56	34	66	57	39	29	NA	NA	NA	NA	52	21	53	65	18	6	87	80	40	32	65	54
Li SS [21]		31	56	12	9	39	61	4	4	24	21	19	44	38	43	5	22	7	5	36	60	42	52	1	13
Okugawa Y [17]		54	65	10	21	25	50	39	36	46	52	18	34	50	55	14	31	6	6	58	80	47	55	17	31
Okamura K [22]		54	18	23	7	56	15	13	9	9	4	68	21	26	6	51	19	NA	NA	NA	NA	16	4	61	21
Sasahira T [24]		21	47	11	23	11	27	21	43	19	32	13	38	17	30	15	40	NA	NA	NA	NA	23	42	9	28
Zhang Y [18]		43	67	21	30	20	51	44	46	27	22	37	75	27	34	37	63	14	3	50	94	NA	NA	NA	NA
Dawson H [20]		27	41	26	46	48	74	4	13	44	71	8	16	31	48	21	39	11	8	42	78	NA	NA	NA	NA
Li L [26]		13	7	5	2	15	3	3	6	14	4	4	5	6	1	12	8	NA	NA	NA	NA	16	4	2	5