Accidental falls represents an elderly very important health problem, both in the community and within the hospital. The aim of this research project is to evaluate the effectiveness of accidental falls prevention care bundle in geriatrics, internal medicine, post acute, and rehabilitation wards, in terms of incidence and outcome reduction. It will be also investigated the cost effectiveness ratio, in terms of falls avoided, care bundle implementation costs, and falls related healthcare costs. The study will permit to evaluate the implementation feasibleness in time, considering the study will last for 20 months.