Non-robotic minimally invasive gastrectomy as an independent risk factor for postoperative intra-abdominal infectious complications: A single-center, retrospective and propensity score-matched analysis

Table 2 Risk factors for morbidity after minimally invasive gastrectomy, n = 1401

Factors	Univariate analysis, OR (95%CI)	P value	Multivariate analysis, OR (95%CI)	P value
Non-robotic minimally invasive surgery	2.438 (1.381–4.304)	0.002	2.591 (1.418–4.717)	0.002
Age ≥ 70 yr	1.020 (0.706–1.474)	0.920
Male	2.277 (1.372–3.779)	0.001	1.969 (1.142–3.390)	0.015
Body mass index ≥ 23 kg/m2	1.138 (0.763–1.698)	0.538
ASA score 2 or higher	1.069 (0.703–1.625)	0.832
cT21 or higher	1.296 (0.870–1.930)	0.222
cN1 positive	1.183 (0.745–1.879)	0.540
cStage II1 or higher	1.649 (1.102–2.467)	0.017	1.247 (0.809–1.922)	0.318
Proximal or total gastrectomy	1.847 (1.230–2.772)	0.004	1.208 (0.753–1.937)	0.433
D2 lymph node dissection	1.204 (0.809–1.792)	0.415
Splenectomy	2.734 (1.179–6.339)	0.026	1.360 (0.542–3.408)	0.512
History of laparotomy	1.083 (0.658–1.783)	0.795
Operative time ≥ 360 min	2.449 (1.613–3.718)	< 0.001	1.800 (1.098–2.952)	0.020
Estimated blood loss ≥ 50 mL	2.039 (1.367–3.042)	< 0.001	1.368 (0.873–2.143)	0.209
Tumor size ≥ 30 mm	1.119 (0.703–1.782)	0.721
pT21 or higher	1.378 (0.926–2.052)	0.125
pN1 positive	1.155 (0.761–1.753)	0.516
pStage II 1 or higher	1.471 (0.987–2.192)	0.061
Use of neoadjuvant chemotherapy	1.274 (0.662–2.452)	0.467
Non-qualified surgeons	1.148 (0.785–1.679)	0.521

¹Japanese Classification of Gastric Carcinoma, 15^th edition. The χ² test was used for univariate analysis. Multivariate logistic regression was used for multivariate analyses of factors having a P value of < 0.05 during univariate analysis. ASA: American Society of Anesthesiologist; OR: Odds ratio; CI: Confidence interval.