Table 2.

Patients’ characteristics, surgical information, and pathological information in validation set (n = 87).

	Total (n = 87)	Postoperative complications (n = 28)	p value	Infectious complications (n = 7)	p value	Anastomotic leakage (n = 5)	p value
Gender			0.62		1.00		1.00
Male	61	21		5		4
Female	26	7		2		1
Age	62 (54–66)	62 (54–66)	0.69a	64 (62–66)	0.34a	64 (58–65)	0.64a
<65	62	21	0.63	5	1.00	4	1.00
⩾65	25	7		2		1
BMI (kg/m2)	24 (22–26)	22 (20–24)	0.01 a	22 (20–24)	0.09a	21 (19–23)	0.06a
ASA Score			1.00		1.00		1.00
1	6	2		0		0
2	77	24		7		5
3	3	1		0		0
Miss	1	1		0		0
Diabetes			0.07		1.00		1.00
No	78	28		7		5
Yes	9	0		0		0
Hypertension			0.14		1.00		0.95
No	62	23		5		3
Yes	25	5		2		2
Preoperative treatment			1.00		0.49		1.000
No	54	17		3		3
Yes	33	11		4		2
cTNM stage			0.09		0.66		0.60
I	9	3		0		0
II	12	2		0		0
III	27	5		2		1
IV	36	16		5		4
Unknown	3	2		0		0
Tumor location			0.12		0.50		1.00
Upper gastric	38	9		2		2
Non-upper gastric	48	18		5		3
Unknown	1	1		0		0
Tumor differentiation			0.05		0.31		0.38
G1	2	2		0		0
G2	21	3		0		0
G3	53	19		5		5
Unknown	11	4		2		0
Operative approach			0.36		0.66		1.00
Open	49	18		5		3
Laparoscopic	38	10		2		2
Resection range			0.27		0.27		0.55
Distal gastrectomy	30	8		1		1
Total gastrectomy	46	14		6		4
Combined resection	0	0		0		0
Others	11	6		0		0
Lymph node dissection			0.11		1.00		1.00
D0	2	2		0		0
D1+	6	1		0		0
D2	79	25		7		5

Bold values here represent the p values 0.05, which were considered statistically significant.

^aMann–Whitney tests.

ASA, American Society of Anesthesiologists; BMI, Body mass index; cTNM, Clinical TNM Stage.