The stages of
chronic kidney disease are determined by the
glomerular filtration rate. Glomerular filtration is the process by which the
kidneys filter the blood, removing excess wastes and fluids. Glomerular
filtration rate (GFR) is a calculation that determines how well the blood is
filtered by the kidneys. It is one way to measure kidney function.
Glomerular filtration rate is usually calculated using a formula that includes a person's age, gender, race, and serum creatinine levels.
A GFR under 60 mL/min/1.73 m² may indicate kidney disease. The lower the GFR
number, the worse the kidney function. This number is an estimate. It may not
be a good measure of kidney health in some people, such as the very young or
very old, amputees, or obese people. In some cases, GFR may also be estimated
with a 24-hour urine collection.
Chronic kidney disease is defined
as either kidney damage or GFR of less than 60 for longer than 3 months.
Stages of chronic kidney disease
What this means to you
Kidney damage with normal or high GFR
90 or above
Your doctor will try to find the cause of
your kidney disease and begin treatment.
Keep your blood pressure
below 130/80 mm Hg. If you have diabetes, control your blood sugar
See your doctor regularly to monitor your condition.
Kidney damage with mildly low GFR
Your doctor will estimate how quickly your
disease is progressing.
Control your blood pressure and blood sugar
Continue regular monitoring.
Kidney damage with moderately low GFR
Your doctor will check you for
complications, such as anemia and bone disease, and begin treatment if
Kidney damage with severely low GFR
Decide what type of treatment you want if
kidney failure develops.
How this information was developed to help you make better health decisions.