Table 2 Definition and staging of CKD
CKD is defined as either of the following present for >3 months | |||||
1) Markers of kidney damage (one or more) | |||||
Albuminuria, urine sediment abnormalities, electrolyte, or other abnormalities attributable to tubular disorders, abnormalities detected by histology, structural abnormalities detected by imaging, history of kidney transplantation | |||||
2) Decreased GFR; GFR <60 mL/min/1.73 m2 (GFR categories G3a–G5) | |||||
GFR category | GFR (mL/min/1.73 m2) | Albuminuria category | AER (mg/day) | ||
G1 | >90 | Normal or high | A1 | <30 | Normal to mildly increased |
G2 | 60–89 | Mildly decreased | A2 | 30–300 | Moderately increased |
G3a | 45–59 | Mildly to moderately decreased | A3 | >300 | Severely increased |
G3b | 30–44 | Moderately to severely decreased | |||
G4 | 15–29 | Severely decreased | |||
G5 | <15 | Kidney failure | |||