RESUMO
Introduction: Acute kidney injury (AKI) appears to be prevalent in ICU COVID-19 patients. Nevertheless, there are few data in comparison with non-COVID-19 patients. The aim of our study was to compare the prevalence of AKI in COVID-19 and non-COVID-19 critically ill patients. Method(s): We performed a retrospective single-center study including all consecutively COVID-19 critically ill mechanically ventilated patients admitted from 03/2020 to 11/2021 to our ICU and all consecutively critically ill mechanically ventilated patients from 08/2020 to 01/2021 and from 03/2021 to 08/2021 admitted to our non-COVID-19 ICU. Patients' demographics, comorbidity including Charlson Comorbidity Index (CCI), outcome, as well as, admission, maximum and minimum creatinine blood values, as well as KDIGO stage were recorded. Two patient groups, i.e., COVID-19 and non-COVID-19 patients were compared in terms of AKI. Result(s): The study included 333 patients (183 COVID-19, 150 non- COVID-19), of an average age 66.3 +/- 14.36 years-old. Between the two patient groups there was no difference in age or sex. COVID-19 patients had a lower CCI score (84% had a score of < 5 compared to 68.8%, p = 0.004). COVID-19 patients had a lower admission creatinine (1.13 +/- 0.78 mg/dl vs 1.49 +/- 1.33 mg/dl, p 0.003), nevertheless, developed more often AKI (74.3% vs 54%, p 0001) during their ICU hospitalization. Among COVID-19 ICU patients that developed AKI 54.4% were stage 1, 18.8% stage 2 and 26.8% stage 3, while 10.27% (19/185) of patients underwent CRRT. Twenty-eight-day mortality was high in COVID-19 patients (66.18%, 90/136). There was no difference in KDIGO stage percentage among the two groups. Conclusion(s): COVID-19 critically-ill patients develop more often AKI compared to non-COVID-19 patients. More studies are required to assess this phenomenon, focusing also on the long-term follow-up of the kidney function of these patients.