
Stages of kidney disease in children

- Medically reviewed by
- AKF's Medical Advisory Committee
- Last updated
- August 7, 2023
Kidney disease in children is diagnosed the same way it is in adults. A urine test, blood test, imaging test or kidney biopsy can help determine if something is wrong with the kidneys.
The eGFR (estimated glomerular filtration rate) blood test shows how well the kidneys are working. The stages of kidney disease are decided by a person's eGFR. eGFR can be used to diagnose a child's stage of kidney disease once the child reaches age two.
A healthy newborn baby's eGFR will be between 40 and 60, which is considered low for adults. Doctors test for kidney disease in children under two years old using methods other than eGFR including a urine or imaging test.
Stages of kidney disease in children and adults ages 2+
Stage 1
Kidney damage with normal or increased GFR
eGFR (Estimated Glomerular Filtration Rate) (mL/min/1.73 m2) - 90 or above and other signs of kidney damage present
Stage 2
Kidney damage with mild decrease GFR
eGFR (Estimated Glomerular Filtration Rate) (mL/min/1.73 m2) - 60-89 and other signs of kidney damage present
Stage 3a
Mild to moderate decrease GFR
eGFR (Estimated Glomerular Filtration Rate) (mL/min/1.73 m2) - 45-59
Stage 3b
Moderate to severe decrease GFR
eGFR (Estimated Glomerular Filtration Rate) (mL/min/1.73 m2) - 45-59
Stage 4
Severe decrease GFR
eGFR (Estimated Glomerular Filtration Rate) (mL/min/1.73 m2) - 15-24
Stage 5
Kidney failure
eGFR (Estimated Glomerular Filtration Rate) (mL/min/1.73 m2) - Less than 15

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