Patient selection and operative strategies for laparoscopic intersphincteric resection without diverting stoma

Table 2 Perioperative outcomes of patients who underwent laparoscopic intersphincteric resection before and after propensity score matching

Variables	Before PSM		P value	After PSM		P value
	DS (n = 421)	SF (n = 84)		DS (n = 78)	SF (n = 78)
Operative time, median (range) min	172 (90, 335)	171 (85, 485)	0.015	174 (90, 335)	168 (90, 480)	0.109
Blood loss, median (range) mL	50 (20, 800)	50 (5, 500)	0.862	50 (10, 200)	50 (5, 500)	0.611
Conversion to open surgery	0 (0)	0 (0)	-	0 (0)	0 (0)	-
Postoperative complication	58 (13.8)	16 (19.0)	0.212	12 (15.4)	15 (19.2)	0.481
CD grade I-II	43 (10.2)	8 (9.5)	0.516	10 (12.8)	7 (9.0)	0.602
CD grade ≥III	15 (3.6)	8 (9.5)	0.035	2 (2.6)	8 (10.3)	0.050
Anastomotic leakage	32 (7.6)	11 (13.1)	0.099	2 (2.6)	10 (12.8)	0.035
Grade A-B	30 (7.1)	6 (7.1)	0.996	2 (2.6)	5 (6.4)	0.439
Grade C	2 (0.5)	5 (6.0)	< 0.001	0 (0)	5 (6.4)	0.069
Ileus	17 (4.0)	0 (0)	0.123	5 (6.4)	0 (0)	0.069
Hemorrhage postoperation	0 (0)	1 (0)	0.370	0 (0)	1 (1.3)	0.316
Mortality	2 (0.5)	1 (1.2)	0.999	1 (1.3)	1 (1.3)	0.669
Reoperation	6 (1.4)	5 (6.0)	0.074	0 (0)	5 (6.4)	0.069
Postoperative hospital stay (day)	9 (4-51)	11 (4-37)	0.070	10 (5-30)	12 (6-37)	0.275
Anastomosis recurrence	8 (1.9)	0 (0)	0.427	2 (2.6)	0 (0)	0.477
Rectovaginal fistula	4 (1.0)	1 (1.2)	0.363	0 (0)	1 (0)	0.998
Anastomotic stricture	21 (5.0)	0 (0)	0.206	2 (2.6)	0 (0)	0.477
Completion rate of postoperative chemotherapy	191/220 (86.8)	23/39 (59.0)	< 0.001	22/25 (88.0)	20/24 (88.9)	0.933
Permanent stoma	47 (11.2%)	2 (2.3%)	< 0.001	5 (6.4)	2 (2.6)	0.521

Data are presented as n (%). CD: Clavien-Dindo; PSM: Propensity score matching; DS: Diverting stoma; SF: Stoma-free.