Clinical Study
Simple Cystatin C Formula for Estimation of Glomerular Filtration Rate in Overweight Patients with Diabetes Mellitus Type 2 and Chronic Kidney Disease
Table 3
The accuracy of formulas within 30% of estimated 51CrEDTA clearance values for different stages of CKD.
| | Stages of chronic kidney disease | CKD stage (number of patients) GFR, mL/min/1.73 m2 | Stage 1 (10) 90 | Stage 2 (17) 60–89 | Stage 3 (36) 30–59 | Stage 4 (39) 15–29 | Stage 5 (11) <15 |
| Equation | Accuracy within 30% of estimated 51CrEDTA clearance (%) |
| C&G formula | 90.0 | 70.6 | 55.6 | 43.6 | 27.3 | MDRD formula | 20.0 | 58.8 | 69.4 | 69.2 | 63.6 | CKD-EPI formula | 20.0 | 58.8 | 69.4 | 66.7 | 54.5 | CKD-EPI creatinine and cystatin formula | 30.0 | 52.9 | 63.9 | 71.8 | 72.7 | Simple cystatin C formula | 80.0 | 82.4 | 63.9 | 23.1 | 0.0 |
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