Univariable predictors of all-cause mortality
| Variable | HR | 95% Cl | p Value |
| Age (per decade) | 1.278 | 1.167 to 1.399 | <0.0001 |
| Gender (female) | 0.967 | 0.720 to 1.300 | 0.82 |
| Complexity (moderate) | 1.290 | 0.813 to 2.040 | 0.28 |
| Complexity (severe) | 4.570 | 3.035 to 6.880 | <0.0001 |
| Cyanosis | 3.059 | 2.155 to 4.342 | <0.0001 |
| NYHA class 2 | 3.930 | 2.670 to 5.780 | <0.0001 |
| NYHA class 3 | 5.680 | 3.400 to 9.470 | <0.0001 |
| NYHA class 4 | 114.480 | 27.160 to 482.570 | <0.0001 |
| Systolic blood pressure | 0.993 | 0.984 to 1.002 | 0.14 |
| Diastolic blood pressure | 0.986 | 0.972 to 1.000 | 0.057 |
| Peak oxygen uptake (100 mL/min) | 0.856 | 0.832 to 0.887 | <0.0001 |
| Perc. pred peak VO2 (/10%) | 0.650 | 0.599 to 0.705 | <0.0001 |
| VE/VCO2 slope | 1.209 | 1.170 to 1.250 | <0.0001 |
| Weight (kg) | 0.984 | 0.975 to 0.993 | <0.0001 |
| Body Mass Index | 0.963 | 0.933 to 0.994 | 0.02 |
Significant values are in bold.
NYHA, New York Heart Association; VO2, peak oxygen uptake; Perc, Percentage.