**5. Limitations**

As already mentioned, this is a study of a limited population from a single UCC. If the results are to be generalised, a substantial study population from several UCCs will be desirable.

This study did not include a follow-up on patient satisfaction. The next study on the outcome of the UCC established should include such a study. Even though there are reasons to believe that patients perceive the UCC as a favourable alternative to the ED, based on the shorter TTP and LOS, other factors such as treatment, follow-up and expectations may impact on patient satisfaction. Such satisfaction is also important for non-MID patients seeking help during a major emergency. It is important that the public feel secure and that patient safety for non-MID patients can be guaranteed by using ordinary staff, material and structures. Another limitation is the scarcity of research related to hospital-based UCCs, especially in a European context. Hopefully, this limited study might inspire other researchers to conduct new research on UCCs in order to improve the sustainability of healthcare.
