RT Book, Section A1 Geary, Denis F. A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7046151 T1 Chapter 477. Chronic Kidney Disease T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7046151 RD 2024/04/19 AB The definition of chronic kidney disease (CKD) and its different stages are outlined in Table 477-1. The term chronic kidney disease has been introduced to ensure consistency of terminology in relation to patients with sustained renal disorders, and to replace the terms chronic renal insufficiency and chronic renal failure.1 The definition of CKD excludes patients younger than 2 years whose renal function improves markedly in the first 2 years of life; therefore, a glomerular filtration rate (GFR) < 90 mL/min/1.73 m2 in a 6-month-old child may not represent any abnormality of renal function.