Fig. 1

Definition of frequent users (FU) for adult (15+), paediatric (0–14) and older (65+) patients. The category of older patients (65+) is a subset of that of the adult patients (15+)
Definition of frequent users (FU) for adult (15+), paediatric (0–14) and older (65+) patients. The category of older patients (65+) is a subset of that of the adult patients (15+)