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Introduction: Hospital-associated functional decline (HAFD) is recognized as a leading cause of adverse hospitalization outcomes, such as prolonged hospitalization, falls, readmission, and mortality. Since most patients hospitalized in internal medicine wards are older-adults, HAFD presents a major challenge to internal medicine., Objectives: Describe functional trajectories of older-adults (aged ≥70 years) before, during and after acute hospitalization in internal-medicine units., Methods: A prospective cohort study was conducted of 741 older-adults, hospitalized in two tertiary hospitals in Israel during the period 2009-2011. Basic functional status two weeks before admission, on-admission, at-discharge and one-month post-discharge was assessed using the modified Barthel Index (BI). Eight trajectories were identified., Results: Two-thirds of the participants were completely or almost independent at the pre-morbid period. About a half of the older-adults were hospitalized with pre-admission functional decline, a quarter deteriorated or died during hospitalization, and one-third improved during hospitalization. Most of the older-adults who were stable in functioning at the pre-admission period (57.1%) remained stable during and post-hospitalization; however, about a third of them did not return to their pre-morbid functioning levels. Approximately half of those with pre-morbid functional decline experienced additional deterioration of at least 5 points on the BI scale. Pre-morbid instrumental functional status, comorbidity and depressive symptoms have been found to distinguish older adults with similar pre-admission and in-hospital functional trends., Discussion: Eight functional trajectories describe the hospitalization period of older-adults in internal-medicine units. On-admission personal characteristics may be used to identify older-adults who are at risk of unwarranted hospitalization outcomes and thus allow intervention in the hospital-community interface.

With the world's population aging, there is an increase in the number of demented elderly. It is vital to study this phenomenon in epidemiological and clinical studies, particularly the effects on the increasing numbers of demented elderly. Researchers need to understand the factors predicting the general decline in the demented elderly. However, before any research is undertaken, it is necessary to obtain approval from the Local Internal Review Board. This committee is responsible to maintain accepted national and international ethical standards. The basis for recruitment to a study is the signature on the informed consent form, where the patient is required to understand the study, internalize the study's aim, to consider all options and finally, to express an opinion. Potential elderly participants need to have their judgment evaluated before signing the form. In cases where the subject is incapable, some countries, including Israel, require that there be a legal guardianship. This is a long and complicated process that causes researchers not to recruit demented patients into a study which may actually be beneficial to all. Some countries allow a proxy to sign informed consent forms to permit the demented subject to participate in the study. Often the threshold may depend on the invasiveness of the intervention. The problem of proxies to sign informed consent form troubles researchers worldwide. This article addresses the history and development of ethics in research, and raises the issue to promote an official policy for proxy consent signing.