Univariable Analysis Multivariable Cox-hazard Model Analysis   95% CI 95% CI   χ2 Hazard ratio Lower Upper p-value χ2 Hazard ratio Lower Upper p-value NYHA functional class 49.1 2.129 1.740 ~ 2.594 <0.0001 21.2 1.696 1.361 ~ 2.108 <.0001 Dyslipidemia 13.2 0.396 0.220 ~ 0.667 0.0003 0.62 0.782 0.406 ~ 1.418 0.4303 Diuretics 24.1 3.084 1.916 ~ 5.229 <0.0001 5.34 1.815 1.091 ~ 3.179 0.0209 Nitrate 13.4 2.121 1.421 ~ 3.128 0.0002 4.02 1.547 1.010 ~ 2.349 0.0448 Nicorandil 2.05 0.694 0.392 ~ 1.122 0.1515         Statins 13.9 0.389 0.216 ~ 0.653 0.0002 6.02 0.481 0.250 ~ 0.868 0.0141 BNP concentration 11.3 1.001 1.000 ~ 1.002 0.0008 6.71 1.001 1.000 ~ 1.002 0.0096 Hemoglobin level 53.7 0.677 0.613 ~ 0.750 <0.0001 24.7 0.741 0.657 ~ 0.834 <.0001 Estimated GFR 31.3 0.968 0.957 ~ 0.980 <0.0001 4.92 0.987 0.974 ~ 0.998   CI: Confidence Interval; NYHA: New York Heart Association; GFR: Glomerular Filtration Rate

Table 4: Results of univariate and multivariate analyses.