Person: Harris, Mitchel
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Harris
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Mitchel
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Harris, Mitchel
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Publication Prevalence and risk factors for periprosthetic fracture in older recipients of total hip replacement: a cohort study(BioMed Central, 2014) Katz, Jeffrey; Wright, Elizabeth; Polaris, Julian JZ; Harris, Mitchel; Losina, ElenaBackground: The growing utilization of total joint replacement will increase the frequency of its complications, including periprosthetic fracture. The prevalence and risk factors of periprosthetic fracture require further study, particularly over the course of long-term follow-up. The objective of this study was to estimate the prevalence and risk factors for periprosthetic fractures occurring in recipients of total hip replacement. Methods: We identified Medicare beneficiaries who had elective primary total hip replacement (THR) for non-fracture diagnoses between July 1995 and June 1996. We followed them using Medicare Part A claims data through 2008. We used ICD-9 codes to identify periprosthetic femoral fractures occurring from 2006–2008. We used the incidence density method to calculate the annual incidence of these fractures and Cox proportional hazards models to identify risk factors for periprosthetic fracture. We also calculated the risk of hospitalization over the subsequent year. Results: Of 58,521 Medicare beneficiaries who had elective primary THR between July 1995 and June 1996, 32,463 (55%) survived until January 2006. Of these, 215 (0.7%) developed a periprosthetic femoral fracture between 2006 and 2008. The annual incidence of periprosthetic fracture among these individuals was 26 per 10,000 person-years. In the Cox model, a greater risk of periprosthetic fracture was associated with having had a total knee replacement (HR 1.82, 95% CI 1.30, 2.55) or a revision total hip replacement (HR1.40, 95% CI 0.95, 2.07) between the primary THR and 2006. Compared to those without fractures, THR recipients who sustained periprosthetic femoral fracture had three-fold higher risk of hospitalization in the subsequent year (89% vs. 27%, p < 0.0001). Conclusion: A decade after primary THR, periprosthetic fractures occur annually in 26 per 10,000 persons and are especially frequent in those with prior total knee or revision total hip replacements.Publication Traditional Bonesetters and Contemporary Orthopaedic Fracture Care in a Developing Nation: Historical Aspects, Contemporary Status and Future Directions(Bentham Science Publishers Ltd., 2011-01-07) Nwachukwu, Benedict; Okwesili, Ikechukwu; Harris, Mitchel; Katz, JeffreyIn developing nations such as Nigeria, where there is a shortage of surgeons formally trained in fracture care, many of the injured seek care from traditional bonesetters. We conducted a qualitative study of fracture care in two settings in Enugu, Nigeria: The National Orthopaedic Hospital Enugu (NOHE) and a traditional bonesetter practice. Primary assessment measures at the NOHE included evaluations of the structure and process of fracture care according to the Orthopaedic Trauma Association’s Level 1 Trauma Center Requirements. Further, we conducted interviews of NOHE patients and hospital staff. We also observed fracture care at a traditional bonesetter practice. We observed the traditional care process and interviewed both bonesetters and patrons of the bonesetter practice. Although the NOHE does not qualify for certification as a Level 1 Trauma Center; the hospital does provide quality care. Our observations suggest a tension between Western and indigenous musculoskeletal practices. We propose that bonesetters not only be taught certain injury management techniques but also be incorporated into the Nigerian healthcare scheme. Bonesetters fill a void created by the severe lack of surgeons and further; bonesetters are primarily located in rural areas where they best care for underserved communities. In an integrated scheme, bonesetters would manage fractures for which they can achieve acceptable outcomes, referring others to local hospitals. An integrated model of fracture care is applicable in all developing countries where bonesetters perform a large proportion of fracture care.Publication The Quality and Readability of Information Available on the Internet Regarding Lumbar Fusion(Georg Thieme Verlag KG, 2015) Zhang, Dafang; Schumacher, Charles; Harris, Mitchel; Bono, ChristopherStudy Design An Internet-based evaluation of Web sites regarding lumbar fusion. Objective: The Internet has become a major resource for patients; however, the quality and readability of Internet information regarding lumbar fusion is unclear. The objective of this study is to evaluate the quality and readability of Internet information regarding lumbar fusion and to determine whether these measures changed with Web site modality, complexity of the search term, or Health on the Net Code of Conduct certification. Methods: Using five search engines and three different search terms of varying complexity (“low back fusion,” “lumbar fusion,” and “lumbar arthrodesis”), we identified and reviewed 153 unique Web site hits for information quality and readability. Web sites were specifically analyzed by search term and Web site modality. Information quality was evaluated on a 5-point scale. Information readability was assessed using the Flesch-Kincaid score for reading grade level. Results: The average quality score was low. The average reading grade level was nearly six grade levels above that recommended by National Work Group on Literacy and Health. The quality and readability of Internet information was significantly dependent on Web site modality. The use of more complex search terms yielded information of higher reading grade level but not higher quality. Conclusions: Higher-quality information about lumbar fusion conveyed using language that is more readable by the general public is needed on the Internet. It is important for health care providers to be aware of the information accessible to patients, as it likely influences their decision making regarding care.Publication Mortality and Readmission After Cervical Fracture from a Fall in Older Adults: Comparison with Hip Fracture Using National Medicare Data(Wiley-Blackwell, 2015) Cooper, Zara; Mitchell, Susan; Lipsitz, Stuart; Harris, Mitchel; Ayanian, John; Bernacki, Rachelle; Jha, AshishBackground Cervical fractures from falls are a potentially lethal injury in older patients. Little is known about their epidemiology and outcomes. Objectives To examine the prevalence of cervical spine fractures after falls among older Americans and show changes in recent years. Further, to compare 12-month outcomes in patients with cervical and hip fracture after falls. Design, Setting, and Participants A retrospective study of Medicare data from 2007–2011 including patients ≥65 with cervical fracture and hip fracture after falls treated at acute care hospitals. Measurements Rates of cervical fracture, 12-month mortality and readmission rates after injury. Results Rates of cervical fracture increased from 4.6/10,000 in 2007 to 5.3/10,000 in 2011, whereas rates of hip fracture decreased from 77.3/10,000 in 2007 to 63.5/10,000 in 2011. Patients with cervical fracture without and with spinal cord injury (SCI) were more likely than patients with hip fracture, respectively, to receive treatment at large hospitals (54.1%, 59.4% vs. 28.1%, p< 0.001), teaching hospitals (40.0%, 49.3% vs. 13.4%, p< 0.001), and regional trauma centers (38.5%, 46.3% vs. 13.0%, p< 0.001). Patients with cervical fracture, particularly those with SCI, had higher risk-adjusted mortality rates at one year than those with hip fracture (24.5%, 41.7% vs. 22.7%, p<0.001). By one year, more than half of patients with cervical and hip fracture died or were readmitted to the hospital (59.5%, 73.4% vs. 59.3%, p<0.001). Conclusion Cervical spine fractures occur in one of every 2,000 Medicare beneficiaries annually and appear to be increasing over time. Patients with cervical fractures had higher mortality than those with hip fractures. Given the increasing prevalence and the poor outcomes of this population, hospitals need to develop processes to improve care for these vulnerable patients.