Table 2.

Characteristics and outcome according to the type of surgery (mitral valve repair or replacement) and associated surgery (isolated or combined) (A) in the subset of patients with degenerative mitral regurgitation and (B) in the subset of patients with functional mitral regurgitation

	Isolated mitral valve surgery				Combined mitral valve surgery
	Overall	Repair	Replacement	P value	Overall	Repair	Replacement	P value
Degenerative mitral regurgitation
Number of patients	5302	3810	1492		2291	1380	911
Age	65±12	63±12	68±12	<0.0001	69±11	68±11	69±11	0.14
Male gender	3193 (60)	2566 (67)	627 (42)	<0.0001	1342 (59)	963 (70)	379 (42)	<0.0001
Charlson Comorbidity Index	0.71±1.24	0.60±1.13	1.00±1.43	<0.0001	1.09±1.53	1.01±1.45	1.22±1.64	0.006
Charlson Comorbidity Index ≥2	841 (16)	494 (13)	347 (23)	<0.0001	613 (27)	333 (24)	280 (31)	0.0005
Public hospital	3196 (60)	2342 (61)	854 (57)	0.005	1552 (68)	960 (70)	592 (65)	0.02
Length of stay, total	13±8	12±6	15±11	<0.0001	16±10	14±9	18±11	<0.0001
Length of stay, intensive care unit	6±9	5±6	8±9	<0.0001	8±8	7±8	9±9	<0.0001
In-hospital mortality	129 (2.4)	43 (1.1)	86 (5.8)	<0.0001	129 (5.6)	42 (3.0)	87 (9.6)	<0.0001
Functional mitral regurgitation
Number of patients	1431	463	968		1504	678	826
Age	66±12	65±12	67±12	0.0006	68±11	69±10	68±11	<0.05
Male gender	741 (52)	314 (68)	427 (44)	<0.0001	921 (61)	509 (75)	412 (50)	<0.0001
Charlson Comorbidity Index	1.70±1.98	1.59±1.79	1.75±2.06	0.29	2.31±2.28	2.37±2.19	2.26±2.34	0.09
Charlson Comorbidity Index ≥2	612 (43)	184 (40)	428 (44)	0.11	831 (55)	396 (58)	435 (53)	0.03
Public hospital	1152 (81)	587 (84)	765 (79)	0.04	1191 (79)	557 (82)	634 (77)	0.01
Length of stay, total	18±15	13±8	20±17	<0.0001	20±16	17±14	21±17	<0.0001
Length of stay, intensive care unit	9±13	5±5	11±15	<0.0001	10±13	5±12	12±14	<0.0001
In-hospital mortality	79 (5.5)	10 (2.2)	69 (7.1)	<0.0001	150 (9.8)	47 (6.9)	103 (12.5)	0.0004