Table 2.

Angiographic and procedural information according to the presence or absence of collaterals

Characteristic	No Collaterals (n=173)	Collaterals (n=96)	P value
Extent of CAD
1 vessel disease	56 (32%)	27 (28%)	<0.0001
2 vessel disease	33 (19%)	34 (35%)	<0.0001
3 vessel disease	18 (10%)	35 (36%)	<0.0001
Severity of CAD
<70% stenosis	101 (58%)	59 (61%)	0.67
≥70% stenosis	107 (62%)	96 (100%)	<0.0001
≥70%, <90% stenosis	141 (81%)	96 (100%)	0.01
>90% stenosis	71 (41%)	96 (100%)	<0.0001
100% stenosis	5 (3%)	14 (15%)	0.065
Culprit artery
Known culprit	63 (36%)	52 (54%)	0.014
Occluded culprit	5 (8%)	14 (27%)	0.068
culprit vessel LAD	3 (1.7%)	12 (13%)	0.118
collateral to culprit	NA	8 (53%)
culprit vessel RCA	26 (15%)	18 (19%)	0.597
collateral to culprit	NA	15 (34%)
culprit vessel LCX	30 (17%)	13 (14%)	0.589
collateral to culprit	NA	5 (12%)
culprit vessel LM	2 (1.2%)	0
collateral to LM	NA	None
culprit vessel SVG	2 (1.2%)	9 (9%)	0.203
collateral to culprit	NA	1 (9%)
PCI performed at the time of the index angiogram	128 (74%)	84 (88%)	0.974

Data presented as number (percentage), CAD= coronary artery disease, LAD= left anterior descending coronary artery, LCX= left circumflex coronary artery, LM= left main coronary artery, PCI percutaneous coronary intervention, RCA= right coronary artery, SVG= saphenous vein graft