Table 2. Dissection characteristics on preoperative imaging.

Characteristics	Marfan syndrome	No Marfan syndrome	P value
Aortic diameters [median (Q1–Q3)]
Aortic annulus	2.8 (2.4–3.7)	2.5 (2.3–2.9)	<0.001
Aortic root	4.7 (3.6–5.8)	4.0 (3.5–4.5)	<0.001
Sinotubular junction	3.9 (3.2–4.8)	3.6 (3.2–4.3)	0.129
Ascending aorta	4.5 (3.6–6.0)	4.6 (3.9–5.3)	0.604
Descending aorta	3.5 (3.0–4.6)	3.6 (3.0–4.2)	0.637
Aortic regurgitation	91 (54.5%)	1,525 (37.1%)	<0.001
Pericardial effusion	37 (19.6%)	1,397 (29.8%)	0.002
Periaortic hematoma	17 (9.8%)	703 (16.5%)	0.018
Coronary artery involvement	20 (13.1%)	303 (8.2%)	0.033
Arch vessel involvement	61 (35.7%)	1,224 (29.8%)	0.102
Abdominal vessel involvement	64 (26.7%)	1,281 (22.7%)	0.150
False lumen patency
Fully patent	123 (76.4%)	2,094 (62.3%)	<0.001
Partial thrombosis	34 (21.1%)	886 (26.4%)	0.138
Complete thrombosis	4 (2.5%)	380 (11.3%)	<0.001