S1. Correlation between each of port complication and patient clinical characteristics.

Variables	N	Without	Infection			Rotation			Dehiscence			Obstruction			Liquid			Metastasis
			With	P		With	P		With	P		With	P		With	P		With	P
BMI, body mass index; ECOG PS, Eastern Cooperative Oncology Group performance status; PCI, peritoneal cancer index; Yes, gastrectomy plus with port implantation; No, port implantation only; LS, laparoscopic exploration surgery; Open, port implanted with open surgery; Before, before the optimization of port implantation procedure; After, after the optimization of port implantation procedure.
Sex				0.49			0.62			0.86			0.28			0.11			0.35
Male	109	89	6			3			3			1			7			0
Female	140	103	10			5			4			0			17			1
Age (year)				0.87			0.18			0.71			0.46			0.31			0.46
<60	166	124	10			7			5			1			18			1
≥60	83	68	6			1			2			0			6			0
BMI (kg/m2)				0.07			0.18			0.42			0.53			0.60			0.53
<23	174	138	8			4			6			1			16			1
≥23	75	54	8			4			1			0			8			0
ECOG PS				0.01			0.21			0.01			0.49			0.04			0.49
0	102	91	1			5			0			0			5			0
1	114	79	12			1			4			1			16			1
2	33	22	3			2			3			0			3			0
PCI				0.67			0.52			0.21			0.54			0.12			0.56
0−10	65	56	3			1			0			0			4			1
11−20	71	51	5			2			2			0			11			0
21−39	113	85	8			5			5			1			9			0
Ascites				0.72			0.73			0.64			0.76			0.43			0.76
Present	229	175	15			7			7			1			23			1
Absent	20	17	1			1			0			0			1			0
Prior chemotherapy				0.97			0.73			0.90			0.51			0.50			0.14
Present	78	59	5			2			2			0			9			1
Absent	171	133	11			6			5			1			15			0
Simultaneous surgery				0.38			0.53			0.56			0.83			0.91			0.83
Yes	10	9	0			0			0			0			1			0
No	239	183	16			8			7			1			23			1
Albumin (g/L)				<0.01			<0.01			0.02			0.21			0.06			0.61
<35	68	40	8			6			4			1			9			0
≥35	181	152	8			2			3			0			15			1
Hemoglobin				0.07			0.53			0.24			0.33			0.50			0.33
Anemia	133	98	12			5			2			1			14			1
Normal	116	94	4			3			5			0			10			0
Glucose				0.06			0.63			0.14			0.76			0.70			0.76
Euglycemia	225	175	12			8			5			1			23			1
Hyperglycemia	24	17	4			0			2			0			1			0
Implantation approach				0.66			0.58			0.61			0.85			0.90			0.85
LS	241	185	16			8			7			1			23			1
Open	8	7	0			0			0			0			1			0
Implantation period				0.02			0.20			0.09			0.22			0.03			0.22
Before	114	76	11			5			5			1			15			1
After	135	116	5			3			2			0			9			0
Implantation group				0.05			0.07			0.03			0.59			0.04			0.59
Specialized group	181	149	9			4			3			1			14			1
Other groups	68	43	7			4			4			0			10			0