Acute Kidney Injury in Critically Injured Combat Veterans: A Retrospective Cohort Study

Ian J. Stewart*, Jonathan A. Sosnov, Jeffrey T. Howard, Kevin K. Chung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Background Acute kidney injury (AKI) has been associated with mortality after traumatic injury. However, there is a paucity of data for military service members with injuries received in combat. We sought to identify risk factors for AKI after combat trauma and evaluate whether AKI is a predictor of mortality. Study Design Retrospective observational study. Settings & Participants US service members who were critically wounded in Iraq or Afghanistan from February 1, 2002, to February 1, 2011, and survived until evacuation to Landstuhl Regional Medical Center, Germany. Predictors Demographic variables, vital signs, injury severity score, presence of burn injury, and mechanism of injury as defined at the time of initial injury, as well as the presence of AKI ascertained within the first 7 days using KDIGO (Kidney Disease: Improving Global Outcomes) serum creatinine criteria. Outcomes Logistic regression models were used to identify risk factors for both AKI and death. Results Of 6,011 records, 3,807 were included for analysis after excluding patients with missing data. AKI occurred in 474 (12.5%) patients and 112 (2.9%) died. More patients with versus without AKI died (n = 62 [13.1%] vs n = 50 [1.5%]; P < 0.001). After adjustment, AKI was a predictor of mortality (OR, 5.14; 95% CI, 3.33-7.93; P < 0.001). Predictors of AKI were age, African American race, injury severity score, amputations, burns, and presenting vital signs. Limitations AKI diagnoses limited to creatinine-based definitions. Conclusions AKI predicted mortality in combat veterans injured in the wars in Iraq and Afghanistan.

Original languageEnglish
Pages (from-to)564-570
Number of pages7
JournalAmerican Journal of Kidney Diseases
Volume68
Issue number4
DOIs
StatePublished - 1 Oct 2016
Externally publishedYes

Keywords

  • Acute kidney injury (AKI)
  • KDIGO AKI criteria
  • burn injury
  • combat
  • combat veteran
  • death
  • military personnel
  • military service
  • mortality
  • risk factors
  • serum creatinine
  • trauma
  • war casualty

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