Background/Aim. One of the most significant predictors of mortality after hip fractures is cognitive impairment (dementia). The aim of this study was to report the results of a prospective study of the influence of some factors on sixmonth mortality in elderly patients with hip fractures. Method. The elderly patients with hip fracture were assessed on admission to the hospital using the measures of cognitive function, the mobility before the fracture, and physical comorbidity, the type of fracture and the place of the injury. Six months later, we checked how many of them were still alive. Results. We performed univariate and multivariate analyses in 132 patients and found that the most significant predictors of six-month mortality were dementia, comorbidity, and prefacture mobility. Conclusions. A comprehensive physical and mental health assessment of an elderly patient after hip fracture could predict mortality. A good examination of cognitive functioning could be very useful in choosing the optimal treatment for this type of patients.