Table 3.

Microscopic scores in aortic dissection vs. aortic aneurysm samples.

Histological Medial Degenerative Change	Degenerative Degree	Aortic Dissection (n = 52)	Aortic Aneurysm (n = 56)	p-Value
Interlamellar (MEMA-i)	Mild	0 (0.00%)	6 (10.71%)	<0.0001
	Moderate	9 (17.31%)	24 (42.86%)
	Severe	43 (82.69%)	26 (46.43%)
Translamellar (MEMA-t)	Mild	4 (7.69%)	20 (40.00%)	0.0001
	Moderate	40 (79.62%)	24 (48.00%)
	Severe	8 (15.38%)	6 (12.00%)
Elastic fragmentation or loss	Mild	11 (21.15%)	29 (54.72%)	0.0011
	Moderate	37 (71.15%)	20 (37.74%)
	Severe	4 (7.69%)	4 (7.55%)
Smooth muscle cell nuclei loss	Mild	26 (50.98%)	26 (70.27%)	<0.0001
	Moderate	23 (45.10%)	10 (27.03%)
	Severe	2 (3.92%)	1 (2.70%)
Laminar medial collapse	Mild	22 (45.83%)	24 (60.00%)	0.0223
	Moderate	22 (45.83%)	14 (35.00%)
	Severe	4 (8.33%)	2 (5.00%)