Table 3.
Multivariate Cox Regression Analyses of Functional, Hemodynamic, and Imaging Parameters: Functional, Hemodynamic, and Imaging Models
| Model | Parameter | Hazard Ratio | 95% CI | P Value | AIC | Concordance |
|---|---|---|---|---|---|---|
| Model 1: Functional | Age | 1.00 | 0.98-1.02 | .681 | 279 | 0.67 |
| Sex | 0.44 | 0.22-0.89 | .023 | … | … | |
| 6MWD | 1.00 | 0.99-1.00 | .003 | … | … | |
| Model 2: Hemodynamic | Age | 1.02 | 1.00-1.04 | .062 | 322 | 0.66 |
| Sex | 0.46 | 0.24-0.89 | .021 | … | … | |
| RHC-RAP | 1.08 | 1.01-1.15 | .024 | … | … | |
| RHC-Svo2 | 0.94 | 0.90-0.98 | .005 | … | … | |
| Model 3: Imaging | Age | 1.03 | 1.01-1.05 | .009 | 331 | 0.63 |
| Sex | 0.52 | 0.27-0.99 | .045 | … | … | |
| CMR-RVEF | 0.96 | 0.93-0.98 | < .001 | … | … |
6MWD = 6-min walk distance; AIC = Akaike information criterion; CMR = cardiac MRI; RAP = right atrial pressure; RHC = right heart catheterization; RVEF = right ventricular ejection fraction; Svo2 = mixed venous oxygen saturation.