CST3 and acute kidney injury: While LDH (OR = 1.002, p = 0.001), BUN (OR = 1.334, p < 0.001), SCr (OR = 1.061, p < 0.001) and serum cystatin C (OR = 51.742, p < 0.001) were positively related with development of AKI in included TBI patients.