Differences in age-related characteristics among elderly patients with hip fractures

Background: Incidence of hip fracture among aging patients has been increasing annually in Japan; patients aged <= 74 years may be inappropriately classified as elderly. This study aimed to identify differences in the incidence of serious perioperative complications and in-hospital, 90-day, 6-month, and 1-year mortality rates according to three age groups among patients with hip fractures. Methods: Patients aged >= 65 years treated for hip fracture by our multidisciplinary treatment system were included in this study. They were divided into the pre-old age (65-74 years), old age (75-89 years), and super-old age (>= 90 years) groups. The baseline characteristics and outcomes of the three groups were compared, and variables associated with in-hospital, 30-day, 6-month, and 1-year mortality were analyzed. Results: In the older population, there was a higher proportion of female participants; those with trochanteric fractures, low bone mineral density, dementia, decreased walking ability and independence in performing activities of daily living; and those not living at home. Moreover, the proportion of patients with hypertension, diabetes mellitus, and circulatory disorders, American Society of Anesthesiologists Physical Status scores, and serum albumin levels significantly differed. Further, there was a significant difference in the incidence of serious complications among males and the 6-month and 1-year mortality rates among females. In addition, female patients in the pre-old age group had a higher mortality rate at any period compared with those in the old age group. Conclusions: Patients with hip fracture who were aged 65-74, 75-89, and >= 90 years differ in terms of baseline characteristics, incidence of complications, and mortality rates. Female patients aged<75 who had fragility hip fractures potentially had worse prognosis. Our findings may be useful in preoperative explanation, postoperative management, and prognostic prediction. (c) 2022 The Japanese Orthopaedic Association. Published by Elsevier B.V. All rights reserved.