Table 4.
Association between CCI and 30-day readmission adjusted for gender, dialysis modality and other variables, respectively
| CCI Subgroup | Gender-adjusted HR | Gender and dialysis modality-adjusted HR | Multivariable-adjusted HRa |
|---|---|---|---|
| CCI = 2 | 1 | 1 | 1 |
| 3 < =CCI < =4 | 0.99 (0.95,1.01) | 1.01 (0.97,1.05) | 1.01 (0.98,1.05) |
| 5 < =CCI < =6 | 1.04 (1.00,1.08) | 1.09 (1.05,1.14) | 1.09 (1.05,1.14) |
| CCI > 6 | 1.07 (1.02,1.12) | 1.14 (1.09,1.19) | 1.14 (1.09,1.20) |
Abbreviations: CCI Charlson Comorbidity Index, HR hazard ratio
aAdjusted for gender, the length of hospital stay, the receipt of mechanical ventilation, rescue, admission through emergency, the modality of dialysis and admission to intensive care unit (ICU)