Saskya Byerly1, Elizabeth Benjamin2, Subarna Biswas3, Jayun Cho4, Eugene Wang5, Monica D Wong6, Kenji Inaba7, Demetrios Demetriades8. 1. Division of Trauma and Surgical Critical Care, Department of Surgery, LAC+USC Medical Center, University of Southern California, Los Angeles, CA, USA. Electronic address: saskya.byerly@med.usc.edu. 2. Division of Trauma and Surgical Critical Care, Department of Surgery, LAC+USC Medical Center, University of Southern California, Los Angeles, CA, USA. Electronic address: elizabeth.benjamin@med.usc.edu. 3. Division of Trauma and Surgical Critical Care, Department of Surgery, LAC+USC Medical Center, University of Southern California, Los Angeles, CA, USA. Electronic address: subarna.biswas@med.usc.edu. 4. Division of Trauma and Surgical Critical Care, Department of Surgery, LAC+USC Medical Center, University of Southern California, Los Angeles, CA, USA. Electronic address: jayuncho11@gmail.com. 5. Division of Trauma and Surgical Critical Care, Department of Surgery, LAC+USC Medical Center, University of Southern California, Los Angeles, CA, USA. Electronic address: ewangwhc@gmail.com. 6. Division of Trauma and Surgical Critical Care, Department of Surgery, LAC+USC Medical Center, University of Southern California, Los Angeles, CA, USA. Electronic address: monica.wong@med.usc.edu. 7. Division of Trauma and Surgical Critical Care, Department of Surgery, LAC+USC Medical Center, University of Southern California, Los Angeles, CA, USA. Electronic address: kenji.inaba@med.usc.edu. 8. Division of Trauma and Surgical Critical Care, Department of Surgery, LAC+USC Medical Center, University of Southern California, Los Angeles, CA, USA. Electronic address: demetrios.demetriades@med.usc.edu.
Abstract
BACKGROUND: Elevated creatinine kinase (CK) can indicate rhabdomyolysis, a risk factor for acute kidney injury (AKI). We investigated risk factors and clinical significance of peak CK levels. METHODS: Retrospective analysis, adult trauma patients. Logistic regression was used to identify risk factors for elevated CK and AKI. RESULTS: 3240 trauma patients were analyzed; median time to peak CK was 17 h and 347 patients had peak CK > 5000. On multivariable analysis, younger males with severe injury were more likely to have peak CK > 5000 and peak CK > 5000 was an independent risk factor for AKI (AOR 3.79). Although peak CK levels were significantly lower in older patients (1,637U/L vs 2,604U/L), older patients were more likely to develop AKI at lower CK levels. CONCLUSIONS: CK levels commonly peak within 1-2 days after admission. Despite lower peak CK levels, older patients are more likely to develop AKI. These data may support more rigorous CK monitoring and lower intervention threshold in older patients.
BACKGROUND: Elevated creatinine kinase (CK) can indicate rhabdomyolysis, a risk factor for acute kidney injury (AKI). We investigated risk factors and clinical significance of peak CK levels. METHODS: Retrospective analysis, adult traumapatients. Logistic regression was used to identify risk factors for elevated CK and AKI. RESULTS: 3240 traumapatients were analyzed; median time to peak CK was 17 h and 347 patients had peak CK > 5000. On multivariable analysis, younger males with severe injury were more likely to have peak CK > 5000 and peak CK > 5000 was an independent risk factor for AKI (AOR 3.79). Although peak CK levels were significantly lower in older patients (1,637U/L vs 2,604U/L), older patients were more likely to develop AKI at lower CK levels. CONCLUSIONS:CK levels commonly peak within 1-2 days after admission. Despite lower peak CK levels, older patients are more likely to develop AKI. These data may support more rigorous CK monitoring and lower intervention threshold in older patients.
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