Table 1 Creatinine- (SCr; mg/dL) based equations for glomerular filtration rate (GFR) estimation.

4-variable MDRD Study equation

GFR (mL/min/1.73 m²) = 175 × SCr ^-1.154 × Age ^-0.203 × 0.742 (if woman) × 1.21 (if black)

CKD-EPI Study equation (white subjects)

If woman:

   if creatinine < 0.7 mg/dL:

   GFR (mL/min/1.73 m²) = 144 × SCr/0.7 ^-0.329 × 0.993^age

   if creatinine > 0.7 mg/dL:

   GFR (mL/min/1.73 m²) = 144 × SCr/0.7 ^-1.209 × 0.993^age

If man:

   if creatinine < 0.9 mg/dL:

   GFR (mL/min/1.73 m²) = 141 × SCr/0.9 ^-0.411 × 0.993^age

   if creatinine > 0.9 mg/dL:

   GFR (mL/min/1.73 m²) = 141 × SCr/0.9 ^-1.209 × 0.993^age