Figure 1From: Reference values for glomerular filtration rate in healthy Brazilian adults Glomerular filtration rate (GFR) values presented as mean (continuous line) ± 2SD (dashed lines) and GFR regression equation (bold line) by age range. Panel A: ages 20–45 years, regression: GFR = 103.4 + 0.26 x age; Panel B: ages 45–70 years, regression: GFR = 136.4 – 0.72 x age.Back to article page