Table 9 Bias, precision, and accuracy of creatinine and cystatin C estimates for patients with estimated < 60 ml/min per 1.73 m2 (n = 20)
Bias | Precision | Accuracy % within | ||
|---|---|---|---|---|
10% | 30% | |||
Estimates using serum creatinine | ||||
• Cockcroft-Gault | − 20.5 | 13.6 | 5 | 23 |
• MDRD | − 4.1 | 8.1 | 43 | 83 |
• CKD-EPI | − 6.5 | 8.7 | 30 | 85 |
Estimates using both serum creatinine and cystatin C | ||||
• CKD-EPI creatinine cystatin C | 4.1 | 5 | 73 | 95 |
Estimates using serum cystatin C | ||||
• CKD-EPI cystatin C | 9.8 | 7.3 | 23 | 70 |