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 1 Patient backgrounds and surgical outcomes following minimally invasive gastrectomy at our institution, n = 1401

Clinicopathological characteristics		Surgical outcomes
Age (yr)	69 (24–93)	No. of operators (certified surgeon)	33 (19)
Gender (M:F)	973:428	Qualified:non-qualified surgeons	925:476
Body mass index (kg/m2)	22.3 (1 4.3–37.3)	Procedure (RG:LG)	359:1042
ASA grade (1:2:3)	500:733:168	Type of resection (DG:PG:TG)	993:89:319
History of laparotomy, n (%)	263 (18.8)	Extent of lymphadenectomy (D1+:D2)	767:634
Tumor size (mm)	30 (0–180)	Splenectomy, n (%)	40 (2.9)
cT1 (1:2:3:4a)	751:264:224:162	Total operative time (min)	348 (147–942)
cN1 (−:+)	1093:308	Estimated blood loss (mL)	30 (0–2150)
cStage1 (I:IIA:IIB:III)	939:76:154:232	No. of dissected LNs	35 (6–114)
pT1 (1:2:3:4a)	797:164:178:262	Conversion to open procedure, n (%)	1 (0.1)
pN1 (0:1:2:3)	949:174:137:141	Reoperation rate, n (%)	15 (1.1)
pStage1 (I:II:III)	856:280:265	In-hospital mortality, n (%)	4 (0.3)
No. of metastatic LNs	0 (0–63)	Morbidity, n (%)	105 (7.5)
Use of preoperative chemotherapy, n (%)	120 (8.6)	Hospital stay following surgery (d)	13 (2–195)

¹Japanese Classification of Gastric Carcinoma, 15^th edition. Data are presented as median with range unless otherwise specified. ASA: American Society of Anesthesiologist; LNs: Lymph nodes; RG: Robotic gastrectomy; LG: Laparoscopic gastrectomy; DG: Distal gastrectomy; PG: Proximal gastrectomy; TG: Total gastrectomy.