Research Article

Colistin-Induced Acute Kidney Injury and the Effect on Survival in Patients with Multidrug-Resistant Gram-Negative Infections: Significance of Drug Doses Adjusted to Ideal Body Weight

Table 2

Univariate and multivariate analyses to identify the factors associated with colistin-induced AKI.

VariableCrude HR (95% CI) valueAdjusted HR (95% CI) value

Age (every 1-year increase)1.02 (1.02–1.03)<0.0011.02 (1.01–1.02)<0.001
CKD (with/without)1.87 (1.43–2.43)<0.0010.95 (0.65–1.39)0.806
Vancomycin (with/without)1.38 (1.09–1.74)0.0081.37 (1.08–1.75)0.011
ACEI (with/without)1.93 (0.91–4.11)0.0872.30 (1.06–4.99)0.036
ARB (with/without)8.56 (1.18–62.0)0.0347.72 (1.04–57.1)0.045
Diuretics (with/without)1.47 (1.14–1.89)0.0031.31 (1.01–1.70)0.041
Baseline total bilirubin level (every increase of 1 mg/dL)1.03 (1.01–1.05)0.0031.03 (1.01–1.06)0.006
Septic shock (with/without)0.77 (0.59–1.02)0.0651.21 (0.89–1.63)0.224
Lactate >18 mg/dL (with/without)1.75 (1.31–2.34)<0.0011.34 (0.98–1.82)0.065
AKI before colistin administration (with/without)2.22 (1.73–2.85)<0.0011.68 (1.22–2.32)0.001
AKI with oliguria ≥2 hours before colistin administration4.04 (2.13–7.67)<0.0012.91 (1.46–5.80)0.002
Daily dose/IBW of colistin (every increase of 1 mg/kg)0.92 (0.85–0.99)0.0371.12 (1.01–1.23)0.027
Total dose/IBW of colistin (every increase of 1 mg/kg)0.994 (0.990–0.998)0.0020.996 (0.992–1.001)0.132

Note. AKI: acute kidney injury, HR: hazard ratio, CI: confidence interval, CKD: chronic kidney disease, ACEI: angiotensin-converting enzyme inhibitor, ARB: angiotensin receptor blockade, and IBW: ideal body weight.