Chronic Kidney Disease Stage 1 (CKD)

Chronic kidney disease (CKD) is divided into five stages. The stages are based on the eGFR test result and how well your kidneys work to filter waste and extra fluid out of your blood. As the stages go up, kidney disease gets worse and your kidneys work less well. At each stage, it is important to take steps to slow down the damage to your kidneys.Kidney disease can get worse in time. In the early stages (Stages 1–3), your kidneys are still able to filter waste out of your blood. In the later stages (Stages 4–5), your kidneys must work harder to filter your blood and may stop working altogether.
The goal at each stage of CKD is to take steps to slow down the damage to your kidneys and keep your kidneys working as long as possible.
https://www.kidneyfund.org/all-about-kidneys/stages-kidney-disease