Table 1.
GFR estimates (SCr serum creatinine, SCysC serum cystatine C)
| Basis of equation and sex | SCr and SCysC values | Equation for estimating GFR |
|---|---|---|
| MDRD |
|
175 × Scr-1.154 × age-0.203 × [0.742 if female] |
| CKD-EPI SCr | ||
| Female |
SCr ≤ 0.7 mg/dL |
144 × (Scr/0.7)-0.329 × 0.993age |
| SCr > 0.7 mg/dL |
144 × (Scr/0.7)-1.209 × 0.993age |
|
| Male |
SCr ≤ 0.9 mg/dL |
141 × (Scr/0.9)-0.411 × 0.993age |
| SCr > 0.9 mg/dL |
141 × (Scr/0.9)-1.209 × 0.993age |
|
| CKD-EPI SCysC |
SCysC ≤ 0.8 mg/L |
133 × (SCysC/0,8)-0.499 × 0.996age [×0.932 if female] |
| SCysC >0.8 mg/L |
133 × (Scys/0,8)-1.328 × 0.996age [×0.932 if female] |
|
| CKD-EPI combined | ||
| Female |
SCr ≤ 0.7 mg/dL and SCysC ≤ 0.8 mg/L |
130 × (Scr/0.7)-0.248 × (SCysC/0.8)-0.375 × 0.995age |
| SCr ≤ 0.7 mg/dL and SCysC > 0.8 mg/L |
130 × (Scr/0.7)-0.248 × (SCysC/0.8)-0.711 × 0.995age |
|
| SCr > 0.7 mg/dL and SCysC ≤ 0.8 mg/L |
130 × (SCr/0.7)-0.601 × (SCysC/0.8)-0.375 × 0.995age |
|
| SCr >0.7 mg/dL and SCysC ≥ 0.8 mg/L |
130 × (SCr/0.7)-0.601 × (SCysC/0.8)-0.711 × 0.995age |
|
| Male | SCr ≤0.9 mg/dL and SCysC ≤ 0.8 mg/L |
135 × (SCr/0.9)-0.207 × (SCysC/0.8)-0.375 × 0.995age |
| SCr ≤ 0.9 mg/dL and SCysC > 0.8 mg/L |
135 × (SCr/0.9)-0.207 × (SCysC/0.8)-0.711 × 0.995age |
|
| SCr >0.9 mg/dL and SCysC ≤ 0.8 mg/L |
135 × (SCr/0.9)-0.601 × (SCysC/0.8)-0.375 × 0.995age |
|
| SCr >0.9 mg/dL and SCysC > 0.8 mg/L | 135 × (SCr/0.7)-0.601 × (SCysC/0.8)-0.711 × 0.995age | |