... whenreading and interpreting the literature, as this may have an effect on the accuracy of estimates of prevalence, incidence, risk ratios, and so forth. More importantly, it is crucial for investigators ... population; the authors staged AKIseverity at initiation of RRT. In their cohort, Bell and colleagues reported a 30-day mortality of 23.5%, 22.0% and 57.9% in patients with Risk, Injury and Failure, ... stay and hospital stay [15,24,31], and the lower renalrecovery (for example, higher serum creatinine at hospitalFigure 1RIFLE and AKIN classifications for acute kidney injury. Risk Injury–Failure–Loss–Endstage...