Table 3.
Cox proportional hazards analysis of the psoas muscle index and psoas muscle density for all-cause mortality.
| Variables | Univariate analysis | Multivariate analysisa | ||
|---|---|---|---|---|
| HR (95% CI) | p-value | HR (95% CI) | p-value | |
| All-cause mortality | ||||
| PMI (continuous) | 0.53 (0.43–0.66) | < 0.0001 | 0.67 (0.52–0.85) | 0.0018 |
| PMD (continuous) | 0.93 (0.92–0.95) | < 0.0001 | 0.96 (0.93–0.98) | 0.0002 |
| Lower PMI | 5.03 (3.05–8.29) | < 0.0001 | 2.05 (1.14–3.68) | 0.016 |
| Lower PMD | 7.00 (4.10–11.93) | < 0.0001 | 3.67 (2.04–6.60) | < 0.0001 |
| Cross-classified (vs. G1) | < 0.0001 | < 0.0001 | ||
| G2 | 4.81 (1.94–11.88) | 0.0007 | 1.83 (0.67–4.96) | 0.24 |
| G3 | 7.26 (3.20–16.45) | < 0.0001 | 3.95 (1.60–9.76) | 0.0029 |
| G4 | 14.38 (7.09–29.14) | < 0.0001 | 5.34 (2.38–11.97) | < 0.0001 |
HR hazard ratio, PMI psoas muscle index, PMD psoas muscle density, G1 higher PMI and higher PMD, G2 lower PMI and higher PMD, G3 higher PMI and lower PMD, G4 lower PMI and lower PMD.
aAdjusted by gender and age, history of cardiovascular disease, geriatric nutritional risk index, simplified creatinine index, and log of C-reactive protein level.