Table 5. Univariate analysis of risk factors for postoperative complications.

Variable		No. of patients	Overall complication	P-value	Severe complication	P-value
Age (yr)				0.005		0.046
	65–74	137	31 (22.6)		9 (6.6)
	≥75	73	30 (41.1)		11 (15.1)
Sex				0.861		0.020
	Male	143	41 (28.7)		9 (6.3)
	Female	67	20 (29.9)		11 (16.4)
ASA score				<0.001		0.728
	1, 2	183	45 (24.6)		17 (9.3)
	≥3	27	16 (59.3)		3 (11.1)
Comorbidity				0.001		0.052
	<2	129	26 (20.2)		8 (6.2)
	≥2	81	35 (43.2)		12 (14.8)
Hemoglobin (g/dL)				0.004		0.061
	<12.0 (female), <13.0 (male)	85	34 (40.0)		12 (14.1)
	≥12.0 (female), ≥13.0 (male)	125	27 (21.6)		8 (6.4)
Albumin (g/dL)				0.001		0.673
	<3.5	16	11 (68.8)		2 (12.5)
	≥3.5	194	50 (25.8)		18 (9.3)
PNI score				0.002		0.311
	<48.2	93	37 (39.8)		11 (11.8)
	≥48.2	117	24 (20.5)		9 (7.7)
NLR				0.017		0.719
	<2.15	113	25 (22.1)		10 (8.8)
	≥2.15	97	36 (37.1)		10 (10.3)
Phase angle				<0.001		0.004
	<4.19° (female), <4.87° (male)	92	41 (44.6)		15 (16.3)
	≥4.19° (female), ≥4.87° (male)	118	20 (16.9)		5 (4.2)
Clinical stage				0.308		0.944
	I	135	36 (26.7)		13 (9.6)
	≥II	75	25 (33.3)		7 (9.3)
Approach				0.380		0.383
	Open	128	40 (31.3)		14 (10.9)
	Laparoscopic	82	21 (25.6)		6 (7.3)
Extent of gastrectomy				0.002		0.009
	Distal	164	39 (23.8)		11 (6.7)
	Total	46	22 (47.8)		9 (19.6)
Lymph node dissection				0.885		0.372
	D1+	60	17 (28.3)		4 (6.7)
	D2	150	44 (29.3)		16 (10.7)
Combined resection				0.022		0.357
	No	197	53 (26.9)		18 (9.1)
	Yes	13	8 (61.5)		2 (15.4)
Operation time (min)				<0.001		0.032
	<210	104	16 (15.4)		5 (4.8)
	≥210	106	45 (42.5)		15 (14.2)
Estimated blood loss (mL)				0.050		0.146
	<200	172	45 (26.2)		14 (8.1)
	≥200	38	16 (42.1)		6 (15.8)
JP drain insertion				0.015		0.099
	No	149	36 (24.2)		11 (7.4)
	Yes	61	25 (41.0)		9 (14.8)

Values are presented as number (%).

BMI = body mass index; ASA = American Society of Anesthesiologists; PNI = prognostic nutritional index; NLR = neutrophil/lymphocyte ratio; JP = Jackson-Pratt.