Retrospective observational study to investigate acute kidney injury (AKI) epidemiology and outcomes in patients hospitalized in University Hospital San Martino, Genova, Italy.

A retrospective observational study was designed to investigate acute kidney injury (AKI) epidemiology and outcome in patients hospitalized in University Hospital San Martino, Genova, Italy.

All data will be extracted from the hospital electronic database. The investigators will evaluate demographic, clinical and laboratory data, including age, sex, serum creatinine (sCr), sodium and electrolytes, intensive care unit (ICU) admission, length of hospital stay, death, comorbidities and primary diagnosis codes at the hospital discharge (using International Classification of Diseases-ICD-9- codes).

The investigators will include also patients affected by Coronavirus disease 19 (COVID-19).

The primary endpoint will be to describe AKI epidemiology, secondary endpoints will be to evaluate AKI-related risk factors and clinical outcomes, such as length of stay and mortality.

Moreover, the investigators will describe the differences in the outcome and treatments of AKI patients in the medical wards and ICU.

Inclusion Criteria:

• Patients admitted to University Hospital San Martino, Italy
• We'll include also patients affected by Coronavirus disease 19 (COVID-19).

Exclusion Criteria:

• Hemodialysis patients

Adult patients admitted to Policlinico Universitario San Martino, Genova, Italy (including those with COVID-19).

Patient data will be anonymized.