CKD staging criteria is also known as chronic kidney disease staging criteria. chronic kidney disease is staged according to the glomerular filtration rate, which can be divided into the following five stages: Stage I, patients with kidney damage, glomerular filtration rate greater than 90 ml/min. Stage II, there is kidney damage with a mild decrease in glomerular filtration rate, glomerular filtration rate of 60-89 ml/min. Stage III, which is a moderate decrease in glomerular filtration rate, glomerular filtration rate of 30-59 ml/min. Stage IV, with severe decrease in glomerular filtration rate, with glomerular filtration rate of 15-29 ml/min. Stage V, with renal failure, with glomerular filtration rate less than 15 ml/min.