Table 2. Prognostic factors associated with the first 5-year mortality.

	Univariate			Multivariate
	HR (95% CI)	P		HR (95% CI)	P
The univariate analysis shows that age, heart rate, SBP, LVEF, and 6MWD were associated with mortality. Meanwhile, multivariate analysis demonstrated that age ≥ 70 years, SBP > 120 mmHg and 6MWT < 450 m were independent risk factors for 5-year mortality. DBP: diastolic blood pressure; HR: heart rate; LVEDD: left ventricular end diastolic diameter; LVESD: left ventricular end systolic diameter; LVEF: left ventricular ejection fraction; SBP: systolic blood pressure; 6MWT: 6-min walk test.
Male	1.12 (0.60-2.10)	0.717
Age ≥ 70 years	3.07 (1.07-8.76)	0.036		5.45 (1.64-18.09)	0.006
HR > 80 beats/min	2.30 (1.21-4.36)	0.011
SBP > 120 mmHg	6.59 (2.93-14.84)	0.000		3.63 (1.50-8.79)	0.004
DBP > 80 mmHg	1.09 (0.57-2.12)	0.784
LVEDD > 65 mm	1.02 (0.98-1.06)	0.453
LVESD > 45mm	1.02 (0.99-1.06)	0.216
LVEF ≤ 35%	3.03 (1.27-17.22)	0.012
NYHA ≥ III	1.68 (0.84-3.36)	0.143
6MWD < 450 m	3.44 (1.79-6.62)	0.000		3.84 (1.72-8.57)	0.001
Potassium < 4.0 mmol/L	0.86 (0.43-1.70)	0.657