The five stages of CKD.

1
Kidney damage with normal or raised GFR:  >90 ml/min/1.73m2
2 Kidney damage with mild decrease in GFR : 60-90 ml/min/1.73m2
3 Moderate decrease in GFR: 30-59 ml/min/1.73m2
4 Severe decrease in GFR: 15-29 ml/min/1.73m2
5 Kidney Failure GFR: <15 ml/min/1.73m2