Analysis of clinical characteristics and predisposing risk factors of the contralateral hip fracture after initial hip fracture in elderly patients—A retrospective cohort study of 1,586 patients

Abstract

Abstract Contralateral hip fracture may occur easily in elderly patients with initial hip fracture. The aim of this study was to investigate the clinical characteristics and major predisposing risk factors of contralateral hip fractures after initial hip fracture in the elderly, providing clinical basis for hip refracture prevention. Data of 1,586 patients were retrospectively analyzed, who sustained first and second hip fracture, and all underwent surgical treatment in our department. The possible predictive factors for the contralateral hip fractures and descriptive statistics related to surgery (blood loss, operation time, the length of hospital stay etc) were recorded. 133 patients suffered from contralateral hip fracture, with the incidence of 8.4%. The refracture rates after femoral neck and intertrochanteric fracture was 5.4% and 10.7% respectively(P<0.01). 54 cases of contralateral hip fracture occurred within 1 year, accounting for 40.6%, 95 cases(71.4%) and 105 cases(78.9%) within two and three years respectvely, the interval time of 21.6 months. The risk factors for sustaining contralateral hip fracture were age, first fracture type, Bone mineral density(BMD), Singh index and concomitant internal medical diseases, which were highly associated with an increased risk for contralateral hip fractures in multivariate logistic regression analysis(P<0.05). Concomitant internal medical diseases, first fracture type，BMD, Singh index and age were found to be the key predictable risk factors for contralateral hip fracture in the elderly with first hip fracture.