Limitations
In addition to its retrospective nature, the study did not include the costs related to the miles driven by the patient or anyone accompanying them nor the contribution of patients’ and caregivers’ time (i.e., a societal perspective). Nonetheless, based on a former study of patients from the unit of the tertiary center that included costs of patient transportation to and from the unit and costs of accompanying personnel [9], this issue is unlikely to undermine the general levels of costs. An additional limitation of the study is the fact that the quick diagnosis unit care delivery approach seems unique to the Spanish National Health System, which precludes a generalizability of the results.