Table 2.

Procedural characteristics of the Patent group and the Occluded group at graft-level

Items	Patent (910)	Occluded (45)	P
On-pump	406 (44.62)	23 (51.11)	0.444
SVG harvest technique			0.072
Endoscopic	103 (11.32)	11 (24.44)
Open	443 (48.68)	23 (51.11)
Proximal anastomosis technique			0.079
PAC	151 (16.59)	7 (15.56)
Proximal anastomosis device	282 (30.99)	20 (44.44)
SAC	115 (12.64)	8 (17.78)
No-touch	362 (39.78)	10 (22.22)
Grafting strategy
In situ IMAs	354 (38.90)	9 (20.00)	0.000
AO-SVG	530 (58.24)	30 (66.67)
Composited	19 (2.09)	6 (13.33)
Free IMAs	7 (0.77)	0 (0.00)
IABP			0.383
No-use	820 (90.11)	38 (84.44)
Pre-operation	42 (4.62)	4 (8.89)
Intra-operation	30 (3.30)	2 (4.44)
Post-operation	13 (1.43)	0 (0.00)
Number of vessel conduits	3.0 (3.0–4.0)	4.0 (3.0–4.0)	0.198
PI	2.4 (1.8–3.2)	3.4 (2.3–5.1)	0.000
MGF	26.0 (18.0–39.0)	23.0 (14.0–39.0)	0.152
DF	69.0 (63.0–76.0)	63.0 (51.8–74.3)	0.007
Bleeding	500 (350–800)	500 (300–900)	0.812
Postoperative TNI max	1.8 (0.8–4.4)	3.0 (1.4–4.4)	0.022
Postoperative CK-MB max	12.8 (6.2–23.2)	16.5 (9.7–28.9)	0.032
Mechanical ventilation time	11.0 (8.0–18.0)	11.5 (8.0–17.0)	0.525
Operation time	270.0 (240.0–310.0)	265.0 (240.0–307.5)	0.914
Antiplatelet strategy			0.022
Aspirin	427 (46.92)	30 (66.67)
Clopidogrel	33 (3.63)	2 (4.44)
Dual-antiplatelet	443 (48.68)	12 (26.67)
New POAF (n, %)	232 (25.49)	17 (37.78)	0.077
CRRT (n, %)	13 (1.43)	1 (2.22)	0.487

LIMA left internal mammary artery, SVG saphenous vein grafting, AO aorta, PI pulse index, MGF mean graft flow, DF diastolic flow fraction, IABP intra-aortic balloon pump, POAF postoperative atrial fibrillation, CRRT continuous renal replacement therapy, PAC partial aorta clamp, SAC single aorta clamp