Table 4. Multiple regression analyses of elderly patients with and without acute kidney injury, with in-hospital complications as the dependent variables.
| Results | Odds ratio | 95% Confidence Interval | p value |
|---|---|---|---|
| Model 1a – All in-hospital complications | |||
| AKI at presentation | 3.51 | 1.32–9.3 | 0.01 |
| SBP at presentation | 0.99 | 0.98–1.0 | 0.08 |
| Model 1b – All in-hospital complications | |||
| AKI KDIGO stage 1 | 3.44 | 1.11–10.7 | 0.03 |
| AKI KDIGO stage 2 | 6.39 | 1.01–51.2 | 0.05 |
| AKI KDIGO stage 3 | 6.39 | 1.01–51.3 | 0.05 |
| Model 2 – New-onset hospital-associated infections | |||
| DM as comorbidity | 2.35 | 1.09–5.07 | 0.03 |
| AKI at presentation | 1.99 | 0.92–4.29 | 0.08 |
| Model 3a – Incident electrolyte imbalances | |||
| AKI at presentation | 7.1 | 3.19–15.8 | <0.01 |
| Model 3b – Incident electrolyte imbalances | |||
| AKI KDIGO stage 1 | 5.37 | 2.1–13.7 | <0.01 |
| AKI KDIGO stage 2 | 7.08 | 1.8–27.9 | <0.01 |
| AKI KDIGO stage 3 | 39.9 | 4.4–362.9 | <0.01 |
Models 1 and 3 include variables from demographic data, all comorbidities, Charlson comorbidity index, vital signs, admission diagnoses, and AKI (with vs. without for 1a and 3a) or AKI (divided into tertiles for 1b and 3b).
Model 2 includes variables from demographic data, all comorbidities, Charlson comorbidity index, vital signs, admission diagnoses, and AKI (with vs. without).
Abbreviations: AKI, acute kidney injury; DM, diabetes mellitus; KDIGO, Kidney Disease Initiative Global Outcome; SBP, systolic blood pressure.