Bar graph of Creatinine clearance ( C
) (Panel A), Urinary flow (Panel B), fractional sodium excretion (FENa) (Panel C), proximal (FEPNa) (Panel E) and post-proximal (FEPPNa) (Panel D) fractional sodium excretion and fractional potassium excretion (FEK) (Panel F) in LS and NI and HI obese subjects before and after oral glucose load (OG). See Results for statistical analysis details. The data are reported as the means ± SD. The level of significance was set at * P ≤ 0.05 or **P ≤ 0.01 to compare LS vs. LS + OG, NI vs. NI + OG and HI vs. HI + OG subgroups (non-parametric analysis by Kruskal-Wallis test).