Table 1 Secondary outcomes and definition
Outcome | Definition |
|---|---|
AKI at admission | The first AKI stage computed within 6 h of ICU admission was used as the AKI stage at admission since creatinine and urine output measurements prior to ICU admission were unavailable. If this value was 1 or greater, the encounter was labeled as having AKI at ICU admission |
AKI at discharge | The last measured value of urine output or serum creatinine was used to calculate AKI stage and this value was used as the AKI stage at discharge |
Maximum AKI | The maximum value of AKI stage during each encounter was calculated and used to assess AKI score distribution |
Maximum AKI per day | The maximum AKI stage per 24-h period in an ICU stay was calculated and used to estimate the prevalence of AKI in each ICU day. This was done for the first 5 days of ICU admission. Encounters with AKI at admission (as defined above) were excluded from this analysis |