Fig. 1From: Urinary chitinase 3-like protein 1 for early diagnosis of acute kidney injury: a prospective cohort study in adult critically ill patientsFlow diagram of the patient selection. Acute kidney injury (AKI) was defined and classified based on the Kidney Disease | Improving Global Outcomes serum creatinine (SCr) or urine output criteria. ICU intensive care unit, RRT renal replacement therapy, y yearBack to article page