Figure 3.

Relationship between plasma PYY and CCK concentrations during fasting and duodenal nutrient stimulation. Relationship between plasma PYY and CCK concentrations during (a) fasting and (b) duodenal nutrient stimulation (expressed as integrated plasma level [area under the curve from 0 to 180 minutes] in critical illness [n = 19]). There was a strong positive correlation between integrated PYY and CCK concentrations during both fasting (r = 0.52, P < 0.05) and nutrient stimulation (r = 0.98, P < 0.0001) in critically ill patients. CCK, cholecystokinin; PYY, peptide YY.