Table 2.

Baseline procedural characteristics at the patient-level according to presence or absence of VGF

Characteristic	With VGF (n=782)	Without VGF (n=1046)	P Value
Angiographic classification
Per protocol angiography only	655 (83.8)	1002 (95.8)
Early angiography only	64 (8.2)	0 (0.0)
Early and per protocol angiographies	63 (8.1)	44 (4.2)
Maximum stenosis of any target vessel ≥75%	790 (72.3)	2317 (71.5)	0.61
Endoscopic vein harvest technique	468 (60.1)	531 (50.9)	<0.001
Any use of composite graft	286 (36.6)	344 (32.9)	0.10
Longest graft length, median (IQR), cm	17.0 (14.3-19.3)	16.0 (14.0-19.0)	0.02
Any proximal (non-suture)	21 (2.7)	19 (1.8)	0.21
Any distal (non-suture)	23 (2.9)	27 (2.6)	0.65
Graft source*			0.32
Arm vein	0 (0.0)	2 (0.2)
Lesser saphenous	12 (1.5)	22 (2.1)
Greater saphenous	770 (98.5)	1022 (97.7)
Worst target artery quality			<0.01
Good	308 (39.4)	484 (46.3)
Fair	281 (36.0)	363 (34.7)
Poor	192 (24.6)	198 (18.9)
Worst graft quality			0.12
Good	537 (68.7)	764 (73.1)
Fair	206 (26.3)	237 (22.7)
Poor	39 (5.0)	44 (4.2)
Use of cardiopulmonary bypass	617 (78.9)	825 (78.9)	0.99
Pump time, median (IQR), min	95.0 (62.0-123.0)	86.0 (51.0-111.0)	<.0001
Cross-clamp time, median (IQR), min	60.0 (33.0-78.0)	53.0 (30.0-72.0)	0.01
Surgical time, median (IQR), min	240.0 (201.0-284.0)	221.0 (186.0-261.0)	<.0001
Type of procedure			0.66
Emergent/salvage	20 (2.6)	32 (3.1)
Urgent	373 (47.7)	480 (45.9)
Elective	389 (49.7)	533 (51.0)

Data presented as no. (%), unless otherwise indicated.

IQR indicates interquartile range; VGF, vein graft failure.

^*For patients with multiple graft sources, the “worst” source according to the following hierarchy was used (worst status listed first): arm vein, lesser saphenous vein, greater saphenous vein