Table 3.
Multivariate logistic regression analysis for factors associated with mortality among hospital-acquired acute kidney injury (HA-AKI) patients
| Variable | OR | 95% CI | P |
|---|---|---|---|
| HA-AKI versus non-HA-AKI | 1.31 | 1.27 to 1.37 | <0.01 |
| Cause of HA-AKI | <0.01 | ||
| prerenal (functional) | 1.75 | 1.46 to 1.98 | |
| renal (intrinsic) | 2.41 | 1.85 to 2.71 | |
| postrenal (obstructive) | Reference | ||
| AKIN score | <0.01 | ||
| AKIN stage 1 | 0.20 | 0.18 to 0.22 | |
| AKIN stage 2 | 0.17 | 0.16 to 0.19 | |
| AKIN stage 3 | Reference | ||
| nrHA-AKI versus erHA-AKI | 2.07 | 1.59 to 2.71 | <0.01 |
| lrHA-AKI versus erHA-AKI | 1.95 | 1.54 to 2.47 | <0.01 |
| Renal replacement therapy | 1.21 | 1.19 to 1.23 | <0.01 |
| Chronic kidney disease | 1.18 | 1.17 to 1.20 | <0.01 |
| Age (years) | <0.01 | ||
| 20 to 39 | 0.019 | 0.016 to 0.021 | |
| 40 to 59 | 0.048 | 0.043 to 0.054 | |
| 60 to 79 | 0.103 | 0.092 to 0.116 | |
| ≥80 | Reference | ||
| Male versus female gender | 0.91 | 0.77 to 1.07 | 0.09 |
| Charlson Comorbidity Score | <0.01 | ||
| <4 | 0.041 | 0.036 to 0.063 | |
| 4 to 5 | 0.163 | 0.132 to 0.194 | |
| >6 | Reference | ||
| Medicine versus surgery ward | 1.25 | 1.23 to 1.26 | <0.01 |
HA-AKI, hospital-acquired acute kidney injury; OR, odds ratio; CI, confidence interval; nrHA-AKI, referred hospital-acquired acute kidney injury; HA-AKI without nephrology referral; lrHA-AKI, late referral HA-AKI.