Table 4.
Univariate Analyses and Multivariate Associations Between CI‐AKI and HV/W Quartiles
| Risk Factors | Univariate Logistic Regression | Multivariate Logistic Regression | ||||
|---|---|---|---|---|---|---|
| OR | 95% CI | P Value | OR | 95% CI | P Value | |
| HV/W ratio Q1 | 1 | Reference | — | 1 | Reference | — |
| HV/W ratio Q2 vs Q1 | 1.57 | 0.80 to 3.05 | 0.188 | 1.13 | 0.55 to 2.29 | 0.740 |
| HV/W ratio Q3 vs Q1 | 2.74 | 1.48 to 5.06 | 0.001 | 1.51 | 0.77 to 2.93 | 0.227 |
| HV/W ratio Q4 vs Q1 | 3.95 | 2.18 to 7.18 | 0.000 | 1.87 | 0.96 to 3.63 | 0.065 |
| Age, y | 1.07 | 1.05 to 1.09 | 0.000 | 1.04 | 1.02 to 1.06 | 0.001 |
| Female sex | 1.59 | 1.05 to 2.41 | 0.027 | 1.13 | 0.70 to 1.83 | 0.609 |
| Smoking | 0.66 | 0.45 to 0.97 | 0.034 | 0.86 | 0.56 to 1.34 | 0.510 |
| eGFR, mL/min per 1.73 m2 | 0.97 | 0.96 to 0.98 | 0.000 | 0.99 | 0.98 to 1.00 | 0.077 |
| Congestive heart failure | 2.74 | 1.85 to 4.05 | 0.000 | 1.54 | 0.98 to 2.44 | 0.063 |
| Diabetes mellitus | 1.27 | 0.85 to 1.90 | 0.243 | 0.93 | 0.60 to 1.45 | 0.751 |
| Emergent PCI | 3.26 | 2.20 to 4.85 | 0.000 | 3.00 | 1.93 to 4.67 | 0.000 |
| Anemia | 1.98 | 1.37 to 2.86 | 0.000 | 1.29 | 0.85 to 1.94 | 0.231 |
| Contrast volume >200 mL | 0.78 | 0.49 to 1.25 | 0.305 | 0.96 | 0.57 to 1.61 | 0.877 |
| Use of diuretics | 2.58 | 1.74 to 3.84 | 0.000 | 1.58 | 1.00 to 2.50 | 0.052 |
| Lesions | 1.24 | 1.04 to 1.47 | 0.016 | 1.16 | 0.95 to 1.42 | 0.148 |
| Stents implanted | 0.90 | 0.76 to 1.07 | 0.234 | 0.91 | 0.74 to 1.11 | 0.350 |
The model against a constant‐only model was statistically significant (χ2=105.0899; P<0.0001). Goodness‐of‐fit test (Hosmer–Lemeshow test: χ2=13.6124; P=0.0924). Nagelkerke's R 2: 0.1604. CI‐AKI indicates contrast‐induced acute kidney injury; eGFR, estimated glomerular filtration rate; HV/W, ratio of hydration volume to body weight; OR, odds ratio; PCI, percutaneous coronary intervention; Q, quartile.