Table I. Definition of chronic kidney disease stage in this study (based on the National Kidney Foundation, Kidney Disease Outcomes Quality Initiatives Guidelines)(National Kidney Foundation 2002).
| Stage | Albuminuria | Glomerular Filtration Rate |
|---|---|---|
| Stage 1 | ≥ 30 mg/g creatinine | ≥ 90 ml/min/1.73 m2 |
| Stage 2 | ≥ 30 mg/g creatinine | 60 – 89 ml/min/1.73 m2 |
| Stage 3 or greater | < 60 ml/min/1.73 m2 |