Аннотация:Aim: To determine the prognostic value of frailty and co-morbidity for outdoor mobility loss and mortality in the elderly. Methods: The retrospective study was conducted among outpatients aged 60 years and above. Patients with ≥ 3 chronic illnesses were treated by doctors who had undergone a 72-hour geriatric training. The outdoor low-mobility group was comprised of patients who failed to visit a doctor because of decreased outdoor mobility during the 3-year follow-up period. The outdoor high-mobility group was comprised of participants with no outdoor mobility loss. Results: 5,678 patients with a mean age of 71.0 ± 0.1 years were included in the study. The risk of outdoor mobility loss rose by 4% per year with men developing it 30% more than women. The effect of frailty was of particular importance because it increased the risk of developing outdoor mobility loss by 70%. Co-morbidity was not associated with a higher risk of outdoor mobility loss, but the investigators did not take into account all possible illnesses, or the severity of disease. The loss of outdoor mobility was associated with increase in mortality. Conclusions: Early detection of frailty can help predict outdoor mobility loss and could reduce mortality among older people.