Prevalence of AKI

The reported prevalence of AKI from US data ranges from 1% (community-acquired) up to 7.1% (hospital-acquired) of all hospital admissions. A clear understanding of the true incidence of AKI is dependent on the population being studied and the criteria used to define AKI. The population incidence from UK data ranges from 172 per million population (pmp) per year from early data up to 486-630 pmp/year from more recent series, again depending on definition. The incidence of AKI requiring renal replacement therapy (RRT) ranged from 22 pmp/year up to 203 pmp/year. An estimated 5-20% of critically ill patients experience an episode of AKI during the course of their illness and AKI requiring RRT has been reported in 4·9% of all admissions to intensive-care units. Data from the Intensive Care National Audit Research Centre suggests that AKI accounts for nearly 10 percent of all ICU bed days.