Table 1.

Descriptive features

Tables	Groups	Frequency (n)	(%)
Gender	M	420	70.0
	F	180	30.0
	Total	600	100.0
Operations	AAR	40	6.7
	AVR	32	5.3
	AVR+AAR	24	4.0
	AVR+CABG	16	2.7
	AVR+MVR	12	2.0
	Bentall	8	1.3
	MVR+CABG	12	2
	CABGx1	20	3.3
	CABGx2	88	14.7
	CABGx3	144	24.0
	CABGx4	132	22.0
	CABGx5	16	2.7
	MVR	56	9.3
	Total	600	100.0

AAR: ascending aortic replacement; AVR: aortic valve replacement; CABG: coronary artery bypass grafting; F: female; M: male; MVR: mitral valve replacement