HAVCR1 and acute kidney injury: Urinary KIM-1 levels in Stage 3 AKI patients (8.3 ± 0.8 ng/L) were significantly higher than those in Stage 2 AKI patients (6.3 ± 0.6 ng/L), and urinary KIM-1 levels in Stage 2 AKI patients were significantly higher than those in Stage 1 AKI patients (5.5 ± 1.1 ng/L); all differences were statistically significant (p < 0.01).