Table 1. Baseline characteristics.

Characteristics	Marfan syndrome (n=258)	No Marfan syndrome (n=6,166)	P value
Age (mean ± SD)	38.2±13.2	63.0±14.0	<0.001
Gender, female	92 (35.7%)	2,115 (34.3%)	0.653
Race, non-white	49 (20.2%)	1,078 (18.7%)	0.535
Type of dissection
Type A dissection	164 (63.6%)	3,994 (64.8%)	0.691
Type B dissection	94 (36.4%)	2,172 (35.2%)	0.691
Hypertension	103 (41.9%)	4,809 (78.4%)	<0.001
Atherosclerosis	16 (6.8%)	1,393 (23.0%)	<0.001
Known aortic aneurysm	89 (37.6%)	909 (14.9%)	<0.001
Diabetes mellitus	10 (4.3%)	541 (8.9%)	0.014
Bicuspid aortic valve	8 (3.8%)	169 (3.0%)	0.527
Any prior cardiac surgery	107 (44.8%)	835 (14.2%)	<0.001
Aortic valve replacement	68 (28.8%)	218 (3.7%)	<0.001
Mitral valve replacement	9 (3.8%)	50 (0.9%)	<0.001
Aortic aneurysm surgery	88 (37.4%)	463 (7.9%)	<0.001
CABG	10 (4.3%)	286 (4.9%)	0.705
Pregnancy-associated aortic dissection	8 (3.3%)	15 (0.3%)	<0.001

SD, standard deviation.