Table 3.

Angiographic Findings Stratified by Age at Index Myocardial Infarction

Factor	40 < Age ≤50 Years (n = 1577, 79%)	Age ≤40 Years (n = 408, 21%)	P Value
Any plaque or stenosis	1517 (97.2%)	383 (96.2%)	.29
Spontaneous dissection	16 (1.1%)	12 (3.1%)	.003
Female	14 (5.1%)	11 (14.9%)	.009
Male	2 (0.2%)	1 (0.3%)	.50
MICAD
No obstructive CAD	77 (4.9%)	29 (7.1%)	< .001
Single-vessel disease	885 (56.1%)	260 (63.7%)
Multi-vessel disease	615 (39.0%)	119 (29.2%)
Segment involvement score, median (IQR)	3 (1, 4)	2 (1, 3.5)	< .001
Gensini score
Single-vessel disease	32 (20, 47)	32 (20, 43.5)	.83
Multi-vessel disease	58 (42, 83)	56 (42, 88)	.65
Total	40 (24, 62)	36.5 (20, 58)	.035

CAD = coronary artery disease; IQR = interquartile range; MICAD = myocardial infarction with CAD.