Table 1 Patient characteristics at baseline

Age, years, median [IQR]

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Male sex, n (%)

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White race, n (%)

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Weight, kg, median [IQR]

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Body mass index, kg/m², median [IQR]

–

–

Renal comorbidities, n (%)

 Chronic kidney disease, stage 3 or higher

–

–

 Prior RRT receipt

–

–

Source of admission to ICU, n (%)

 Emergency department

–

–

 Transfer from another hospital

–

–

 Hospital ward

–

–

 Another ICU within the hospital

–

–

 Operating room

–

–

 Outpatient

–

–

Study ICU, n (%)

 Medical

–

–

 Surgical

–

–

 Cardiac

–

–

 Neuro

–

–

 Trauma

–

–

Admitting diagnosis, n (%)

–

–

 Sepsis or septic shock

–

–

 Traumatic brain injury

Mechanical ventilation, n (%)

–

–

Vasopressors, n (%)

–

–

UHC expected mortality, %, mean (95% CI)

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–

Serum creatinine, mg/dl, median [IQR]

 Lowest in 12 months prior to hospitalization

–

–

 No. (%) of patients

–

–

 Lowest between hospitalization and ICU admission

–

–

 No. (%) of patients

–

–

 Estimated by three-variable formula

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–

 No. (%) of patients

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–

 Study baseline

–

–

Acute kidney injury, stage 2 or higher

–

–