Table 2.
Within-subject correlations between concentrations of total amino acids and glucose, insulin, glucagon, ghrelin, GIP, GLP-1, and PYY.
| Concentrations | r | p |
|---|---|---|
| Glucose (mmol/L) | −0.12 | 0.35 |
| Insulin (mU/L) | 0.80 | <0.001 |
| Glucagon (pg/mL) | 0.84 | <0.001 |
| Ghrelin (pg/mL) | −0.32 | 0.013 |
| GIP (pmol/L) | 0.82 | <0.001 |
| GLP-1 (pmol/L) | 0.62 | <0.001 |
| PYY (pmol/L) | 0.45 | <0.001 |
r and p values of within-subject correlations between plasma concentrations of total amino acids (mmol/L; AUC) and concentrations (AUC) of blood glucose and plasma insulin, glucagon, ghrelin, gastric inhibitory peptide (GIP), glucagon-like peptide-1 (GLP-1), and peptide tyrosine-tyrosine (PYY) in younger and older men. Within-subject correlations were determined by using a general linear model with fixed slope and random intercept. n = 20 (n = 19 for plasma concentrations of GIP and GLP-1).