Table 1.

Equations used for calculation of estimated GFR.

Equations Based on Creatinine
Equation 1	$eGFR-Schwartz creatinine (\mathrm{mL}/\min /1.73 {\mathrm{m}}^2)=42.3\times {\left(\frac{height \left(\mathrm{m}\right)}{creatinine \left(\mathrm{mg}/\mathrm{dL}\right)}\right)}^{0.79}$
Equation 2	$eGFR-Brandt \left(\frac{\mathrm{mL}}{\min }\right)=k\times \sqrt{\frac{\left(age \left(months\right)+6\right)\times \left(weight\left(\mathrm{kg}\right)\right)}{creatinine\left(\frac{\mathrm{mg}}{\mathrm{dL}}\right)}}$
	$k=0.95 \left(females\right) and 1.05 \left(males\right)$
Equation 3	$eGFR-Millisor \left(\mathrm{mL}/\min /1.73 {\mathrm{m}}^2\right)=0.33\times \left(\frac{height \left(\mathrm{cm}\right)}{creatinine \left(\mathrm{mg}/\mathrm{dL}\right)}\right)$
Equations Based on Cystatin C
Equation 4	$eGFR-Schwartz cystatin C \left(\mathrm{mL}/\min /1.73 {\mathrm{m}}^2\right)=40.6\times {\left(\frac{1.8}{cystatin C (\mathrm{mg}/\mathrm{L}}\right)}^{0.93}$
Equation 5	$eGFR-FAS cystatin C \left(\mathrm{mL}/\min /1.73 {\mathrm{m}}^2\right)=107.3 ÷ \left(\frac{cystatin C \left(\mathrm{mg}/\mathrm{L}\right)}{0.82}\right)$
Equation 6	$eGFR-Berg=91\times cystatin C {\left(\mathrm{mg}/\mathrm{L}\right)}^{-1.213}$

eGFR: estimated glomerular filtration rate.