Table 1.

Correlation between clinicopathological characteristics and BMI before matching

Characteristics	Low BMI (n = 107)	Normal BMI (n = 862)	High BMI (n = 241)	P value
Gender
Male	83	677	189	0.974
Female	24	185	52
Age
≤ 60	66	501	134	0.558
> 60	41	361	107
Tumor location
Upper third	33	300	92	0.327
Middle third	15	155	31
Lower third	53	349	100
Entire	6	58	18
Tumor size (cm)
≤ 5	61	574	175	0.016
> 5	46	288	66
Borrmann type
I	19	102	34	0.498
II	29	232	59
III	37	305	84
IV	12	64	13
Pathological type
Well differentiated	6	74	24	0.511
Moderately differentiated	22	218	68
Poorly differentiated	74	540	140
Signet ring cell or Mucinous	5	30	9
Type of gastrectomy
Proximal	7	78	25	0.594
Distal	41	316	97
Total	59	468	119
Tumor depth
T1	10	161	52	0.047
T2	10	71	30
T3	39	308	86
T4a	46	315	72
T4b	2	7	1
Lymph node metastasis
N0	23	291	99	0.005
N1	20	141	49
N2	20	153	33
N3a	26	182	45
N3b	18	95	15
Tumor stage
Ia	8	140	47	0.006
Ib	3	50	17
IIa	10	100	34
IIb	19	122	45
IIIa	21	109	27
IIIb	16	163	37
IIIc	30	178	34