Cystatin C for discrimination between normal and impaired creatinine clearance in the subgroups of 32 female patients and 25 patients with Child-Pugh class C
| Cut off value | Creatine 0.9 mg/100 ml | Urea 28 mg/100 ml | Cystatin C 1.0 mg/l | |||
|---|---|---|---|---|---|---|
| Female | Child-Pugh C | Female | Child-Pugh C | Female | Child-Pugh C | |
| Sensitivity (%) | 38.9 | 60.0 | 41.2 | 53.3 | 77.8*† | 86.7 |
| *p<0.05 versus urea; †p<0.05 versus creatinine; McNemar test. | ||||||
| Specificity (%) | 92.9 | 60.0 | 78.6 | 60.0 | 64.3 | 60.0 |
| Pos predictive value (%) | 87.5 | 69.2 | 70.0 | 66.7 | 73.7 | 76.5 |
| Neg predicitive value (%) | 54.2 | 50.0 | 52.4 | 46.2 | 69.2 | 75.0 |
| Efficiency (%) | 72.5 | 60.0 | 58.1 | 56.0 | 71.9 | 76.0 |