Table 2. The risk factors of long-term survival and recurrent MR.

	Univariate analysis		Multivariate analysis
	HR (95% CI)	P value	HR (95% CI)	P value
(A) Cox regression analysis of survival
Age	1.05 (1.01–1.08)	0.019	1.04 (1.00–1.08)	0.047
AF	2.30 (1.08–4.91)	0.030
LVESD >40 mm	2.48 (1.17–5.28)	0.018
EF <60%	3.46 (1.62–7.39)	0.001	3.09 (1.43–6.65)	0.04
Maze surgery	2.60 (1.22–5.53)	0.013
(B) Risk factors of recurrent MR
Age	1.019 (1.00–1.03)	0.026	1.02 (1.00–1.04)	0.013
Sex (women)	1.71 (1.19–2.45)	<0.01	1.68 (1.10–2.32)	<0.01
BMI	0.90 (0.86–0.96)	<0.01	0.91 (0.86–0.96)	<0.01
AF	1.47 (1.01–2.12)	0.043
E wave velocity	1.01 (1.00–1.01)	<0.01	1.01 (1.00–1.01)	<0.01
Complex pathology	1.53 (1.07–2.20)	0.02	1.60 (1.10–2.32)	0.005
Pulmonary hypertension	1.36 (1.11–1.71)	0.003
Residual 1 + MR Post-surgery	1.74 (1.18–2.76)	0.014	1.68 (1.08–2.62)	0.023
CPB time	1.00 (1.00–1.01)	0.032
Aortic clamping time	1.01 (1.00–1.01)	0.018	1.01 (1.00–1.01)	0.041

AF: atrial fibrillation; BMI: body mass index; CI: confidence interval; CPB: cardiopulmonary bypass; EF: ejection fraction; HR: hazard ratio; LVESD: left ventricular end systolic diameter; MR: mitral regurgitation