Mean averaged 24-h continuous glucose profiles in the two paired subsets of patients derived from either the overall population (A) (n = 68 in each subset) or the group treated with diet alone (B) (n = 15 in each subset). The subsets were selected after patients had been separated for the presence/absence of a dawn phenomenon. Solid curves, subsets of patients with the presence of a dawn phenomenon; dotted curves, subsets of patients with the absence of a dawn phenomenon.