Mortality after low trauma hip fracture: a prospective cohort study
1 Metabolic disease research center, Zanjan University of Medical Sciences, Zanjan, Iran
2 Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
3 Endocrinology & Metabolism Research Center (EMRC), Tehran University of Medical Sciences, Tehran, Iran
BMC Musculoskeletal Disorders 2012, 13:143 doi:10.1186/1471-2474-13-143Published: 10 August 2012
Various risk of mortality due to hip fracture has been reported by different studies. There is scarce controlled study on hip fracture mortality from developing countries and no data from Middle East region. The objective of this study is to determine mortality and its risk factors one year after low trauma hip fracture.
One hundred and two patients after hip fracture not caused by high impact injuries or local bone diseases followed up prospectively for one year. Control group consisted of sex and age matched patients admitted to ophthalmology ward for eye surgery. Data about comorbidity obtained from both groups at baseline. Functional state and health-related quality of life for the participants were measured using RDRS-2 and SF-36 questionnaires, respectively.
The overall survival was 83% in cases and 92% in controls (log rank test 3.62, df = 1, P = 0.057). Early mortality within the first 6 months of observation was significantly higher in patients than controls (13 in patients vs. 2 in controls) (log rank test 8.84, df = 1, P = 0.003). The risk of mortality in the first year after fracture was significantly and independently associated with age and baseline RDRS score. By the end of follow-up, in the patient group, 55.4% of survivors were able to walk without any assistance and 10.8% were not able to walk.
The risk of mortality within the first 6 months of observation was significantly and independently associated with low trauma hip fracture. However, age and baseline RDRS score were independent predictors of mortality in the first year following hip fracture.