Table 2.

Summary of validation studies for acute kidney injury and renal replacement therapy codes in adults and pediatric administrative health research.

ACS' NSQIP, American College of Surgeons' National Surgical Quality Improvement Program; AKI, acute kidney injury; AKI-RRT, AKI receiving renal replacement therapy; AMI, acute myocardial infarction; ARF, acute renal failure; CABG, coronary artery bypass graft; CI, confidence interval; CRRT, continuous renal replacement therapy; ESRD, end-stage renal disease; HD, hemodialysis; ICD-9, International Classification of Disease, Ninth Revision; ICD-10, International Classification of Disease, Tenth Revision; ICU, intensive care unit; KDIGO, Kidney Disease Improving Global Outcomes; NHDS, National Hospital Discharge Survey; NIS, Nationwide Inpatient Sample; NPV, negative predictive value; NR, not reported; PD, peritoneal dialysis; PPV, positive predictive value; SCr, serum creatinine; UO, urine output.