Table 2.

Extent of Aortic Replacement at Time of Aortic Dissection

	Total (n=175)	Pathogenic (n=31)	Benign/Normal (n=144)	p-value
Type A (n=108)	108	21	87
Root				0.002
Root preservation	63 (58)	6 (29)	57 (65)
Root replacement	45 (42)	15 (71)	30 (35)
Ascending replacement	106 (98)	21 (100)	85 (98)	1.00
Arch replacement				0.12
None/Hemiarch	78 (72)	18 (86)	60 (69)
Zone 1/2/3	30 (28)	3 (14)	27 (31)
Frozen elephant trunk	5 (5)	1 (5)	4 (5)	1.00
Institution of procedures*				0.006
Michigan Medicine	72 (68)	9 (43)	63 (74)
Outside hospital	34 (32)	12 (57)	22 (26)
Type B (n=67)	67	10	57
Proximal descending replacement	3 (5)	1 (10)	2 (4)	0.39
TEVAR	10 (15)	1 (10)	9 (16)	1.00

Data presented as median (25%, 75%) for continuous data and n (%) for categorical data.

TEVAR = thoracic endovascular aortic repair.

^*:Two patients were medically managed were not included.