Fig. 1

Boxplots of the glomerular filtration rate estimates in mL min⁻¹ 1.73 m⁻² according to 12 formulas. Boxplots of the glomerular filtration rate estimates in mL min⁻¹ 1.73 m⁻² according to 12 formulas. In blue, yellow and green, formulas depending respectively on creatinine, cystatin C and both. In dotted red line, the limit defining augmented renal clearance (ARC), at 130 mL min⁻¹ 1.73 m⁻²