Table 1.

Glomerular filtration rate (GFR) formulas.

GFR Estimation	Formula
Cockroft-Gault Formula	$\mathrm{CrCl}\left(\mathrm{mL}/\min \right)=\frac{140-\mathrm{age}\times \mathrm{Lean}\mathrm{Body}\mathrm{Weight}\left(\mathrm{kg}\right)}{\mathrm{Scr}(\mathrm{mg}/\mathrm{dL})\times 72}\left(\times 0.85\mathrm{if}\mathrm{female}\right)$
MDRD Formula	$$\begin{gathered} \mathrm{GFR}\left(\mathrm{mL}/\min /1.73{\mathrm{m}}^2\right)=186\times \mathrm{SCr}{(\mathrm{mg}/\mathrm{dL})}^{-1.154}\times {\mathrm{age}}^{-0.203}\times 0.742\left(\mathrm{if}\mathrm{woman}\right) \\ \hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\hspace{1em}\times 1.21\left(\mathrm{if}\mathrm{Black}-\mathrm{American}\right) \end{gathered}$$

CrCl: Creatinine clearance, mL: Milliliters, min: Minutes, kg: Kilograms, SCr: Serum creatinine, mg: Milligrams, dL: Deciliters, m: Meters.