Over the last decades, along with the aging of the population, an increase in the demand for medical services has been observed in developed countries. Older people are more prone to illnesses, often have a large burden of chronic diseases and require hospitalization more frequently than younger people. Therefore, the highest share of healthcare-designated resources is used for the care of older subjects [1–3]. Hospital admissions and hospital-stay rates increase with age, and are accompanied by a greater risk of adverse events, such as hospital-acquired infections, functional decline, in-hospital death and re-hospitalization [4–6].
