Secretion of melatonin and 6-sulfatoxymelatonin urinary excretion in functional dyspepsia

Figure 4 Twenty-four-hour urinary 6-OHMS excretion in patients with epigastric pain syndrome (two shades of light grey, n = 30) and postprandial distress syndrome (two shades of dark grey, n = 30). Darker bars represent patients with severe symptoms (n = 16 for epigastric pain syndrome (EPS) and n = 15 for postprandial distress syndrome (PDS)) and lighter bars, patients with moderate symptoms (n = 14 for EPS and n = 15 for PDS). Box represents median with 25th and 75th percentiles (lower and upper quartiles, respectively). The ends of the error bars represent the smallest and largest measurements in studied groups. ^bP < 0.01.