Machine learning identifies the risk of complications after laparoscopic radical gastrectomy for gastric cancer

Table 3 Univariate analysis of severe complications after laparoscopic distal gastrectomy in gastric cancer patients

Variate	No-severe complication (%)	Severe complication (%)	t/χ2	P value	OR	95%CI
Age group
Age ≤ 65	239	38	1.905	0.168
Age > 65	121	28			1.455	0.852-2.485
Gender
Male	234	41	0.095	0.758
Female	126	25			1.132	0.658-1.948
BMI group
BMI ≤ 28	347	57	9.49	0.002
BMI > 28	13	9			4.215	1.722-10.313
Hb	129.7 ± 26.6	126.8 ± 26.2	0.797	0.424	0.996	0.986-1.006
ALB	40.7 ± 4.85	40.3 ± 4.03	0.707	0.48	0.98	0.927-1.036
Tumor size	3.2 ± 1.8	3.5 ± 2.0	-1.346	0.179	1.101	0.967-1.266
Bleeding volume	103.3 ± 89.2	128.6 ± 91.9	-2.109	0.036	1.003	1.000-1.005
Operative time	230.7 ± 45.1	232.4 ± 42.2	-0.282	0.778	1.001	0.995-1.007
Blood transfusion	6.9 ± 49.86	50.00 ± 121.8	-27.381	< 0.001	1.006	1.003-1.010
Severe heart disease
No	359	64	2.748	0.064
Yes	1	2			11.219	1.002-125.553
Severe lung disease
No	358	63	4.601	0.032
Yes	2	3			8.524	1.396-52.039
Hypertension
No	302	55	0.013	0.91
Yes	58	11			1.041	0.541-2.109
Diabetes
No	329	60	0.016	0.899
Yes	31	6			1.061	0.424-2.654
Surgerical type
Totally	82	20	1.734	0.188
Assisted	278	46			0.678	0.380-1.212
Reconstruction
Billroth I	90	12	6.133	0.105
Billroth II	106	26			1.840	0.878-3.854
Roux-en-Y	113	24			1.593	0.755-3.360
Billroth II + Braun	51	4			0.588	0.180-19.19
ECOG score
0	323	27	95.605	< 0.001
1	34	26			9.148	4.804-17.421
2	3	13			51.840	13.913-193.157
ASA score
2	353	55	29.802	< 0.001	10.086	3.750-27.124

BMI: Body mass index; ASA: Aneshesiologists; ECOG: Eastern Collaborative Oncology Group.