Table 1. Details of the GFR estimating equations.

Equation	Formula	Measurement of GFR
Schwartz1976[6]	$55\times \frac{\text{H}}{\text{sCrJ}}\times {1.273}^{\text{boy}>13ys}$	Inulin
Schwartz2009[7]	$41.3\times \frac{\text{H}}{\text{sCrE}}$	Iohexol
Filler[15]	91.62 × (1/sCysC)1.123	99mTc-DTPA
CKiD[7]	$39.1\times {\left[\frac{\text{H}}{\text{sCrE}}\right]}^{0.516}\times {\left[\frac{1.8}{\text{sCysC}}\right]}^{0.294}\times {\left[\frac{30}{\text{BUN}}\right]}^{0.169}\times \left[{1.099}^{\text{boy}}\right]\times {\left[\frac{\text{H}}{1.4}\right]}^{0.188}$	Iohexol

Units: Height (H,m), Body weight (W, kg), serum creatinine (sCr, mg/dL, sCrJ means creatinine measured by the Jaffe method and sCrE means creatinine measured by the IDMS-traceable enzymatic method), serum cystatin C (sCysC, mg/L), BUN (mg/dL)