Table 3.

Characteristics according to ABO blood type

Patient characteristics	Total	ABO				P-values
		A	B	O	AB	Pa
Total	505	140	142	161	62
Gender						0.770
Male	287	82	83	86	36
Female	218	58	59	75	26
Age b(years)						0.054
<60	233	71	59	82	21
≥60	272	69	83	79	41
BMI b, kgm2						0.721
<18.5	36	9	13	10	4
18.5-23.9	282	83	81	87	31
≥24	187	48	48	64	27
Locationc						0.339
tumour height >12 cm	30	4	7	15	4
tumour height 6-12 cm	209	62	62	60	25
tumour height <6 cm	266	74	73	86	33
Pathology(adenocarcinoma)						0.526
Well differentiated	72	18	17	28	9
Moderately differentiated	376	105	113	115	43
Poorly differentiated	57	17	12	18	10
Lymphatic/vascular invasion						0.868
Yes	323	88	90	107	38
No	182	52	52	54	24
PNI						0.723
Yes	169	51	49	49	20
No	336	89	93	112	42
pT status						0.024
pT1	60	15	12	25	8
pT2	119	29	34	50	6
pT3	289	85	86	74	44
pT4	37	11	10	12	4
pN status						0.277
pN0	247	61	70	91	25
pN1	171	54	47	45	25
pN2	87	25	25	25	12
pTNM stage						0.038
Stage I	141	36	37	58	10
Stage II	124	29	41	37	17
Stage III	240	75	64	66	35
Smoking history						0.390
Yes	359	101	107	107	44
No	146	39	35	54	18
Drinking history						0.281
Yes	400	114	118	122	46
No	105	26	24	39	16
Tumor size						0.155
≥3.4	194	49	48	73	24
<3.4	311	91	94	88	38
CEA						0.117
Normal	333	90	105	99	39
Elevated	172	50	37	62	23
CA199						0.889
Normal	469	129	132	149	59
Elevated	36	11	10	12	3
CA125						0.858
Normal	488	134	137	157	60
Elevated	17	6	5	4	2

Abbreviations: BMI=body mass index; pN status=pathological node status; pT statue=pathological tumour status; pTNM status=pathological tumour-node-metastasis stage.

a:χ2 test (A blood type vs B blood type vs O blood type vs AB blood type).

b: Chinese definition.

c: NCOTARGET. 2015;6(34):36884-9.