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 6 Risk factors for intra-abdominal infectious complications (propensity score-matched cohort, n = 708)

Factors	Univariate analysis, OR (95%CI)	P value	Multivariate analysis, OR (95%CI)	P value
Non-robotic minimally invasive surgery	2.333 (1.084–5.024)	0.038	2.463 (1.070–5.682)	0.034
Age ≥ 70 yr	1.141 (0.546–2.388)	0.849
Male	4.852 (1.487–15.834)	0.003	3.937 (1.157–13.333)	0.028
Body mass index ≥ 23 kg/m2	1.064 (0.511–2.214)	> 0.999
ASA score 2 or higher	1.135 (0.538–2.393)	0.851
cStage II1 or more	1.394 (0.651–2.982)	0.416
Proximal or total gastrectomy	2.513 (1.205–5.240)	0.014	1.694 (0.722–3.974)	0.226
D2 dissection	1.023 (0.508–2.061)	> 0.999
Splenectomy	1.579 (0.467–5.339)	0.668
Operative time ≥ 360 min	4.863 (1.963–12.048)	< 0.001	2.779 (1.003–7.701)	0.049
Estimated blood loss ≥ 50 mL	3.596 (1.682–7.687)	0.001	2.204 (0.967–5.023)	0.060
Tumor size ≥ 30 mm	1.057 (0.508–2.201)	> 0.999
pStage II1 or more	1.120 (0.531–2.363)	0.848
Use of neoadjuvant chemotherapy	1.599 (0.224–11.419)	0.729
Non-qualified surgeons	2.047 (1.018–4.118)	0.045	1.852 (0.810–4.237)	0.145

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.