The stages of kidney disease (CKD) are based on how well the kidneys can filter waste and extra fluid out of the blood in your body. In the early stages of kidney disease, your kidneys are still able to filter out waste from your blood whereas in later stages, your kidneys must work harder to get rid of waste and may stop working altogether.
The way doctors measure how well your kidneys filter waste from your blood is by the Estimated Glomerular Filtration Rate, or eGFR.
The stages of kidney disease are based on the eGFR number.
- Stage 1 CKD means you have mild kidney damage and an eGFR of 90 or greater.
- Stage 2 CKD means you have mild kidney damage and an eGFR between 60 and 89.
- Stage 3 CKD means you have an eGFR between 30 and 59 and it means that there is some damage to your kidneys and they are not working as well as they should be.
- Stage 4 CKD means you have an eGFR between 15 and 29and it means your kidneys are moderately or severely damaged and are not working as they should be. This should be taken very seriously as it is the last stage before kidney failure.
- Stage 5 CKD means you have an eGFR less than 15 and it means the kidneys are getting very close to failure or they have completely failed. If your kidneys fail, waste builds up in your blood, which makes you very sick.
The sooner you know you have kidney disease, the sooner you can make changes to protect your kidneys.