Fig 1. Average leptin serum concentrations (mean values) plotted against the BMI status of HSS and LSS patients (in increasing order).

HSS = patient group with high symptom severity; LSS = patient group with less severe symptoms. Leptin was measured in μg/ l. Standard deviations (sd) are plotted in grey, number of measurements are plotted as black dots. Note that statistical analyses in the LSS group were performed starting with BMI = 16 kg/m².