The Bedside Schwartz Equation is the primary tool used by pediatricians and pediatric nephrologists to estimate the Glomerular Filtration Rate (GFR) in children and adolescents.
Height as a Variable
In adults, age and sex are sufficient to estimate baseline muscle mass. In children, a 10-year-old could be extremely tall or very short for their age, drastically altering their muscle mass and baseline creatinine production. Dr. George Schwartz recognized this and developed a formula utilizing patient height in centimeters.
eGFR = (0.413 × Height in cm) / Serum Creatinine
Clinical Application
Like adults, an eGFR below 60 mL/min/1.73m² indicates significant chronic kidney disease. Monitoring this number is crucial for dosing antibiotics safely in children and managing congenital renal anomalies.