KDIGO CKD staging by GFR and UACR categories with colour charts for risk of initiation of maintenance renal replacement therapy. Green represents low risk, yellow represents moderately increased risk, orange represents high risk, and red represents very high risk. If no other markers of kidney disease, no CKD; GFR, glomerular filtration rate; UACR, urinary albumin to creatine ratio. Adapted from KDIGO (2020)²³.