Table 4. AUC using ROC curve analysis to predict all-cause and cardiovascular mortality by various parameters.
| All-cause mortality |
Cardiovascular mortality |
|||||
|---|---|---|---|---|---|---|
| 1-year | 3-year | 5-year | 1-year | 3-year | 5-year | |
| AUC for each variable | ||||||
| RDW | 0.791 | 0.726 | 0.699 | 0.769 | 0.743 | 0.74 |
| (0.72, 0.87) | (0.66, 0.8) | (0.62, 0.78) | (0.72, 0.82) | (0.66, 0.83) | (0.66, 0.82) | |
| Albumin | 0.785 | 0.757 | 0.683 | 0.748 | 0.717 | 0.673 |
| (0.7, 0.87) | (0.69, 0.83) | (0.6, 0.76) | (0.59, 0.9) | (0.62, 0.82) | (0.57, 0.78) | |
| Hemoglobin | 0.580 | 0.528 | 0.51 | 0.504 | 0.48 | 0.475 |
| (0.46, 0.7) | (0.45, 0.61) | (0.43, 0.59) | (0.35, 0.65) | (0.38, 0.58) | (0.37, 0.58) | |
| Ferritin | 0.684 | 0.599 | 0.584 | 0.602 | 0.568 | 0.538 |
| (0.58, 0.79) | (0.52, 0.67) | (0.51, 0.65) | (0.47, 0.74) | (0.47, 0.66) | (0.44, 0.63) | |
| Iron saturation | 0.63 | 0.538 | 0.535 | 0.597 | 0.487 | 0.491 |
| (0.51, 0.75) | (0.45, 0.62) | (0.46, 0.61) | (0.45,0.74) | (0.37, 0.6) | (0.39, 0.59) | |
| White blood cell count | 0.735 | 0.58 | 0.588 | 0.583 | 0.506 | 0.492 |
| (0.62, 0.85) | (0.49, 0.67) | (0.51, 0.66) | (0.42, 0.75) | (0.39, 0.62) | (0.39, 0.6) | |
| AUC for variables in model 4 plus the following variable | ||||||
| Variables in model 4 + RDW | 0.916 | 0.892 | 0.876 | 0.924 | 0.875 | 0.882 |
| (0.88, 0.96) | (0.85, 0.93) | (0.83, 0.92) | (0.86, 0.99) | (0.81, 0.94) | (0.83, 0.94) | |
| Variables in model 4 + albumin | 0.905 | 0.876 | 0.866 | 0.899 | 0.829 | 0.843 |
| (0.86, 0.95) | (0.83, 0.92) | (0.82, 0.92) | (0.83, 0.97) | (0.76, 0.9) | (0.78, 0.91) | |
| Variables in model 4 + hemoglobin | 0.902 | 0.867 | 0.847 | 0.816 | 0.822 | 0.831 |
| (0.86, 0.94) | (0.82, 0.91) | (0.79,0.9) | (0.72, 0.91) | (0.76, 0.88) | (0.78, 0.89) | |
| Variables in model 4 + ferritin | 0.911 | 0.877 | 0.854 | 0.862 | 0.824 | 0.831 |
| (0.86, 0.96) | (0.84, 0.92) | (0.8, 0.91) | (0.79,0.94) | (0.76, 0.89) | (0.77, 0.9) | |
| Variables in model 4 + iron saturation | 0.889 | 0.888 | 0.875 | 0.914 | 0.849 | 0.855 |
| (0.84, 0.94) | (0.85, 0.93) | (0.83, 0.92) | (0.85, 0.98) | (0.78, 0.92) | (0.8, 0.91) | |
| Variables in model 4 + White blood cell count | 0.895 | 0.88 | 0.872 | 0.896 | 0.836 | 0.847 |
| (0.84, 0.94) | (0.84, 0.92) | (0.82, 0.92) | (0.81, 0.98) | (0.77, 0.9) | (0.79, 0.9) | |
Data are presented as AUC (95% confidence interval).
Abbreviations: AUC, area under the curve; ROC, receiver operating characteristic.
Variables in model 4 included age, sex, body mass index, smoking status, medications usage, comorbid conditions and peritoneal dialysis related parameters.