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Balal S, Ansari AS, Sim PY, Juwale H, Ismailjee MA, Hussain R, Ahmad S, Sharma A. The incidence and prevalence of recurrent corneal erosion syndrome in London, UK. Eye (Lond) 2023; 37:3213-3216. [PMID: 36899109 PMCID: PMC10564719 DOI: 10.1038/s41433-023-02490-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 02/28/2023] [Accepted: 03/03/2023] [Indexed: 03/12/2023] Open
Abstract
BACKGROUND Recurrent corneal erosion syndrome (RCES) is caused by repeated episodes of corneal epithelial breakdown due to improper adherence of the corneal epithelium to the underlying basement membrane. The most common aetiologies are corneal dystrophy or previous superficial ocular trauma. The incidence and prevalence of the condition is currently unknown. This study aimed to determine the incidence and prevalence of RCES within the London population over a 5-year period in order to better inform clinicians and evaluate how this condition affects ophthalmic service provision. METHODS A retrospective cohort study over a 5-year period reviewed 487,690 emergency room patient attendances at Moorfields Eye Hospital (MEH) London between 1 January 2015 and 31 December 2019. MEH caters for a local population comprising of around ten regional clinical commissioning groups (CCGs). The data for this study were collected using OpenEyesTM electronic medical records including demographics and comorbidities. The CCGs encompass 41% (3,689,000) of London's total 8,980,000 inhabitants. Using these data the crude incidence and prevalence rates of disease were estimated with results reported per 100,000 population. RESULTS Out of 330,684 patients, 3623 patients were given a new diagnosis of RCES by the emergency ophthalmology services, and from these, 1056 patients attended outpatient follow-up. The crude annual incidence of RCES was estimated at 25.4 per 100,000, with a crude prevalence rate of 0.96%. There was no statistical difference in annual incidence across the 5-year period. CONCLUSIONS The period prevalence of 0.96% shows that RCES is not uncommon. There was also a stable annual incidence over the 5-year period, showing no changing trend over the study period. However, identifying the true incidence and period prevalence is a challenging task, as minor cases may heal prior to examination by an ophthalmologist. It is highly likely that RCES is underdiagnosed and therefore underreported.
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Affiliation(s)
- Shafi Balal
- Moorfields Eye Hospital, 162 City Road, London, UK.
- UCL Institute of Ophthalmology, 11-43 Bath St, Greater London, UK.
| | - Abdus Samad Ansari
- Section of Academic Ophthalmology, School of Life Course Sciences, FoLSM, King's College London, London, UK
| | | | - Harun Juwale
- The University of Manchester, Oxford Road, Manchester, UK
| | | | | | - Sajjad Ahmad
- Moorfields Eye Hospital, 162 City Road, London, UK
- UCL Institute of Ophthalmology, 11-43 Bath St, Greater London, UK
| | - Anant Sharma
- Moorfields Eye Hospital, 162 City Road, London, UK
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Berecki-Gisolf J, Fernando T, D'Elia A. Trends in mortality outcomes of hospital-admitted injury in Victoria, Australia 2001-2021. Sci Rep 2023; 13:7201. [PMID: 37138036 PMCID: PMC10156905 DOI: 10.1038/s41598-023-34114-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 04/25/2023] [Indexed: 05/05/2023] Open
Abstract
Due to advancements in trauma treatment methods, it is expected that survivability of hospital-admitted injuries gradually improves over time. However, measurement of trends in all-cause injury survivability is complicated by changes in case mix, demographics and hospital admission policy. The aim of this study is to determine trends in hospital-admitted injury survivability in Victoria, Australia, taking case-mix and patient demographics into account, and to explore the potential impact of changes in hospital admission practices. Injury admission records (ICD-10-AM codes S00-T75 and T79) between 1 July 2001 and 30 June 2021 were extracted from the Victorian Admitted Episodes Dataset. ICD-based Injury Severity Score (ICISS) calculated from Survival Risk Ratios for Victoria was used as an injury severity measure. Death-in-hospital was modelled as a function of financial year, adjusting for age group, sex and ICISS, as well as admission type and length of stay. There were 19,064 in-hospital deaths recorded in 2,362,991 injury-related hospital admissions in 2001/02-2020/21. Rates of in-hospital death decreased from 1.00% (866/86,998) in 2001/02 to 0.72% (1115/154,009) in 2020/21. ICISS was a good predictor of in-hospital death with an area-under-the-curve of 0.91. In-hospital death was associated with financial year (Odds Ratio 0.950 [95%CI 0.947, 0.952]), in logistic regression modelling adjusted for ICISS, age and sex. In stratified modelling, decreasing injury death trends were observed in each of the top 10 injury diagnoses (together constituting > 50% of cases). Admission type and length of stay were added to the model: these did not alter the effect of year on in-hospital death. In conclusion, a 28% reduction in rates of in-hospital deaths in Victoria was observed over the 20-year study period, in spite of aging of the injured population. This amounts to 1222 additional lives saved in 2020/21 alone. Survival Risk Ratios therefore change markedly over time. A better understanding of the drivers of positive change will help to further reduce the injury burden in Victoria.
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Affiliation(s)
- Janneke Berecki-Gisolf
- Monash University Accident Research Centre, Monash University, Clayton Campus, Clayton, VIC, 3800, Australia.
| | - Tharanga Fernando
- Monash University Accident Research Centre, Monash University, Clayton Campus, Clayton, VIC, 3800, Australia
| | - Angelo D'Elia
- Monash University Accident Research Centre, Monash University, Clayton Campus, Clayton, VIC, 3800, Australia
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The influence of weight-bearing status on post-operative mobility and outcomes in geriatric hip fracture. Eur J Trauma Emerg Surg 2022; 48:4093-4103. [PMID: 35290469 PMCID: PMC9532285 DOI: 10.1007/s00068-022-01939-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 02/20/2022] [Indexed: 11/10/2022]
Abstract
Purpose We hypothesized that unrestricted or full weight-bearing (FWB) in hip fracture would increase the opportunity to mobilize on post-operative day 1 (POD1mob) and be associated with better outcomes compared with restricted weight-bearing (RWB). Methods Over 4 years, 1514 geriatric hip fracture patients aged 65 and above were prospectively recruited. Outcomes were compared between FWB and RWB patients. The primary outcome was 30-day mortality. Secondary outcomes were immobility-related adverse events, length of stay (LOS), and reoperation for failure. Causal effect modelling and multivariate regression with mediation analyses were performed to examine the relation between weight-bearing status (WBS), POD1mob, and known mortality predictors. Results FWB was allowed in 1421 (96%) of 1479 surgically treated patients and RWB enforced in 58 (4%) patients. Mortality within 30 days occurred in 141 (9.9%) of FWB and 3 (5.2%) of RWB patients. In adjusted analysis, RWB did not influence 30-day mortality (OR 0.42, 95% CI 0.15–01.13, p = 0.293), with the WBS accounting for 91% of the total effect on mortality and 9% contributed from how WBS influenced the POD1mob. RWB was significantly related to increased DVT (OR 7.81, 95% CI: 1.81–33.71 p = 0.002) but no other secondary outcomes. Patients that did not have the opportunity to mobilize had increased 30-day mortality (OR 2.31, 95% CI 1.53–3.48 p < 0.001). Conclusion Restricted weight-bearing was not associated with increased 30-day mortality. Only a small proportion of this effect was mediated by POD1mob. Whilst post-surgical WBS may be difficult to influence for cultural reasons, POD1mob is an easily modifiable target that is likely to have a greater effect on 30-day mortality. Level of evidence Level III, observational study.
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Tan CMP, Park DH, Chen YD, Jagadish MU, Su S, Premchand AXR. Mortality rates for hip fracture patients managed surgically and conservatively in a dedicated unit in Singapore. Arch Orthop Trauma Surg 2022; 142:99-104. [PMID: 32945956 DOI: 10.1007/s00402-020-03605-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 09/09/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION At our hospital, an unusually high proportion of patients and families opted for conservative management of hip fractures. This study aimed to compare the mortality rates of patients with hip fractures treated conservatively to that of operatively managed patients in a dedicated hip fracture unit. MATERIALS AND METHODS Retrospective analysis was done for patients who were treated for hip fractures between January 2015 and October 2017 in a Hip Fracture Unit at a tertiary hospital. Patients were managed non-operatively or surgically after discussion with the multi-disciplinary team. RESULTS 233 patients were treated conservatively and 781 underwent operative management for hip fractures. Patients managed non-operatively had a higher inpatient, 30-day and 1-year mortality rates. Inpatient mortality was 6.01% for conservatively managed compared to 0% for operative management. 30-day mortality for conservatively managed patients was 8.58% as compared to 0% for operatively managed patients, and 1-year mortality was 33.05% as opposed to 8.96%. There was an association seen with the type of management of hip fractures and that of inpatient death (p = 0.000), death in 30 days (p = 0.000) and death in 1 year (p = 0.000). The type of management was a predictive factor in 1-year mortality (p = 0.000). The average number of co-morbidities in conservatively managed patients was 5.2 compared to surgically managed patients of 4.0. Conservatively managed hip patients had a higher prevalence of stroke, chronic kidney disease and ischemic heart disease. Complications during hospital stay were comparable for both groups. The mean length of hospital stay was similar for both groups. CONCLUSION Surgical intervention for hip fractures is associated with lower inpatient, 30-day and 1-year mortality rates. However, patient co-morbidities and pre-morbid conditions should also be considered. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Cheryl Marise Peilin Tan
- Department of Orthopaedic Surgery, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore, 768828, Singapore.
| | - Derek Howard Park
- Department of Orthopaedic Surgery, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore, 768828, Singapore
| | - Ying Dong Chen
- Department of Orthopaedic Surgery, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore, 768828, Singapore
| | - Mallya Ullal Jagadish
- Department of Geriatric Medicine, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore, 768828, Singapore
| | - Su Su
- Department of Geriatric Medicine, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore, 768828, Singapore
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Beer N, Riffat A, Volkmer B, Wyatt D, Lambe K, Sheehan KJ. Patient perspectives of recovery after hip fracture: a systematic review and qualitative synthesis. Disabil Rehabil 2021; 44:6194-6209. [PMID: 34428389 DOI: 10.1080/09638288.2021.1965228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE The purpose of the current review is to synthesize the evidence of patients' perspectives of recovery after hip fracture across the care continuum. METHODS A systematic search was conducted, focusing on qualitative data from hip fracture patients. Screening, quality appraisal, and a subset of articles for extraction were completed in duplicate. Themes were generated using a thematic synthesis of data from original studies. RESULTS Fourteen high-quality qualitative studies were included. Four review themes were identified: recovery as participation, feelings of vulnerability, driving recovery, and reliance on support. Patients considered recovery as a return to pre-fracture activities or "normal" enabling independence. Feelings of vulnerability were observed irrespective of the time since hip fracture and only diminished when recovery of function and activities enabled participation in valued activities, e.g., outdoor mobility. Participants expressed a desire to engage in recovery with realistic expectations and the benefits of meaningful feedback reported. While reliance on healthcare professionals decreased towards a later stage of recovery, reliance on social support persisted until recovery was perceived to have been achieved. CONCLUSION Patient perspectives highlighted hip fracture as a major life event requiring health professional and social support to overcome feelings of vulnerability and enable active engagement in recovery.IMPLICATIONS FOR REHABILITATIONRehabilitation professionals should ensure expectations and goals are set early in the recovery process.Rehabilitation professionals should ensure goals set with patients are tailored to the individual's pre-fracture activities or "normal" promoting independence.Rehabilitation professionals should monitor goals ensuring they are providing support, motivation, and managing expectations across the care continuum.Rehabilitation professionals should address patients' feelings of vulnerability, particularly in the absence of social support, and ensure appropriate ongoing input to maximize recovery.
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Affiliation(s)
- Natasha Beer
- Department of Population Health Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK
| | - Aleena Riffat
- Department of Population Health Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK
| | - Brittannia Volkmer
- Department of Population Health Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK
| | - David Wyatt
- Department of Population Health Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK.,National Institute for Health Research Biomedical Research Centre at Guy's and St. Thomas' NHS Foundation Trust, King's College London, London, UK
| | - Kate Lambe
- Department of Population Health Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK
| | - Katie J Sheehan
- Department of Population Health Sciences, School of Population Health and Environmental Sciences, King's College London, London, UK
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Tarrant SM, Graan D, Tarrant DJ, Kim RG, Balogh ZJ. Medial Calcar Comminution and Intramedullary Nail Failure in Unstable Geriatric Trochanteric Hip Fractures. ACTA ACUST UNITED AC 2021; 57:medicina57040338. [PMID: 33916146 PMCID: PMC8066145 DOI: 10.3390/medicina57040338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 03/22/2021] [Accepted: 03/25/2021] [Indexed: 11/16/2022]
Abstract
Background and Objectives: An increasing global burden of geriatric hip fractures is anticipated. The appropriate treatment for fractures is of ongoing interest and becoming more relevant with an aging population and finite health resources. Trochanteric fractures constitute approximately half of all hip fractures with the medial calcar critical to fracture stability. In the management of unstable trochanteric fractures, it is assumed that intramedullary nails and longer implants will lead to less failure. However, the lack of power, inclusion of older generation femoral nails, and a variable definition of stability complicate interpretation of the literature. Materials and Methods: Between January 2012 and December 2017, a retrospective analysis of operatively treated geriatric trochanteric hip fracture patients were examined at a Level 1 Trauma Centre. The treatment was with a long and short version of one type of trochanteric nail. Unstable trochanteric fractures with medial calcar comminution were examined (AO31A2.3, 2.3 & 3.3). The length of the medial calcar loss, nail length, demographics, fracture morphology, and relevant technical factors were examined in univariate and multivariate analysis using competing risk regression analysis. The primary outcome was failure of fixation with post-operative death the competing event and powered to previously reported failure rates. Results: Unstable patterns with medial calcar comminution loss constituted 617 (56%) of operatively treated trochanteric fractures. Failure occurred in 16 (2.6%) at a median post-operative time of 111 days (40-413). In univariate and multivariate analysis, only younger age was a significant predictor of failure (years; SHR: 0.91, CI 95%: 0.86-0.96, p < 0.001). Nail length, medial calcar loss, varus reduction, and other technical factors did not influence nail failure. Conclusions: In a cohort of unstable geriatric trochanteric hip fractures with medial calcar insufficiency, only younger patient age was predictive of nail failure. Neither the length of the medial calcar fragment or nail was predictive of failure.
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Affiliation(s)
- Seth M. Tarrant
- Department of Traumatology, John Hunter Hospital, Lookout Rd, New Lambton Heights, NSW 2305, Australia; (S.M.T.); (D.G.); (D.J.T.); (R.G.K.)
- School of Medicine and Public Health, University of Newcastle, Callaghan, NSW 2308, Australia
| | - David Graan
- Department of Traumatology, John Hunter Hospital, Lookout Rd, New Lambton Heights, NSW 2305, Australia; (S.M.T.); (D.G.); (D.J.T.); (R.G.K.)
- School of Medicine and Public Health, University of Newcastle, Callaghan, NSW 2308, Australia
| | - Drew J. Tarrant
- Department of Traumatology, John Hunter Hospital, Lookout Rd, New Lambton Heights, NSW 2305, Australia; (S.M.T.); (D.G.); (D.J.T.); (R.G.K.)
| | - Raymond G. Kim
- Department of Traumatology, John Hunter Hospital, Lookout Rd, New Lambton Heights, NSW 2305, Australia; (S.M.T.); (D.G.); (D.J.T.); (R.G.K.)
| | - Zsolt J. Balogh
- Department of Traumatology, John Hunter Hospital, Lookout Rd, New Lambton Heights, NSW 2305, Australia; (S.M.T.); (D.G.); (D.J.T.); (R.G.K.)
- School of Medicine and Public Health, University of Newcastle, Callaghan, NSW 2308, Australia
- Correspondence:
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Abstract
OBJECTIVE To determine how timing of surgery affects transfusion, major complications, and mortality in patients who sustain a geriatric hip fracture while taking dual antiplatelet therapy (DAPT; typically aspirin and clopidogrel). DESIGN Retrospective cohort study. SETTING University-affiliated Level 1 Trauma Center. PATIENTS Patients 65 years of age or older on DAPT with a geriatric hip fracture were investigated at a single institution between 2002 and 2017. Demographic and perioperative data were collected from patient records, institutional databases, and national hip fracture registry. INTERVENTION Fixation or arthroplasty. MAIN OUTCOME MEASUREMENT Transfusion, major complications, and 30-day mortality. RESULTS Of the 6724 patients sustaining a geriatric hip fracture, 122 patients were taking DAPT on admission. Timing of surgery did not influence transfused units (incidence rate ratio 1.00, 95% confidence interval: 0.87-1.15, P = 0.968) but did affect major complications (time modeled as quadratic term; odds ratios ranging from 0.20 to 7.91, ptime = 0.001, ptime*time<0.001) and 30-day mortality (odds ratio 1.32, 95% confidence interval: 1.03-1.68, P = 0.030). CONCLUSION Surgical delay does not change the need for transfusion of hip fracture patients on DAPT, but it is associated with increased probabilities of major complications and 30-day mortality. LEVEL OF EVIDENCE Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.
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Tarrant SM, Catanach MJ, Sarrami M, Clapham M, Attia J, Balogh ZJ. Direct Oral Anticoagulants and Timing of Hip Fracture Surgery. J Clin Med 2020; 9:jcm9072200. [PMID: 32664649 PMCID: PMC7408859 DOI: 10.3390/jcm9072200] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/01/2020] [Accepted: 07/07/2020] [Indexed: 11/16/2022] Open
Abstract
Timely surgical intervention in hip fracture has been linked to improved outcomes. Direct Oral Anticoagulants (DOACs) are an emerging class of anticoagulants without evidence-based guidelines on surgical timing. This study aims to investigate how DOACs affect surgical timing and hence perioperative outcomes. A retrospective database/registry review was conducted for geriatric hip fracture patients aged 65 and over between 2011 and 2018. Primary outcome was 30-day mortality. Secondary outcomes included serious adverse events (SAE), transfusion and postoperative day (POD) 1 haemoglobin (Hb) levels. From a cohort of 3264 patients, 112 admitted subjects were taking DOACs; the annual proportion on DOACs increased over time. Mean time to surgery from last dose (Ts) was 2.2 (±1.0 SD) days. The primary outcome, 30-day mortality, occurred in 16 (14%) patients with secondary outcomes of SAEs in 25 (22%) patients and transfusion in 30 (27%) patients. Ts (days) did not significantly affect 30-day mortality (odds ratio (OR): 1.37, 95% confidence interval (CI): 0.80–2.33; p = 0.248), SAE (hazard ratio (HR): 1.03, 95% CI: 0.70–1.52; p = 0.885), transfusion (OR: 0.72 95% CI: 0.45 to 1.16; p = 0.177) or POD 1 Hb (OR: 1.99, 95% CI: −0.59 to 4.57; p = 0.129). Timing of surgery does not influence common surgical outcomes such as 30-day mortality, SAE, transfusion, and POD1 Hb in patients taking DOACs on admission.
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Affiliation(s)
- Seth M. Tarrant
- John Hunter Hospital, Lookout Rd, New Lambton Heights, NSW 2305, Australia; (S.M.T.); (M.J.C.)
- University of Newcastle, Callaghan, NSW 2308, Australia; (M.S.); (J.A.)
| | - Michael J. Catanach
- John Hunter Hospital, Lookout Rd, New Lambton Heights, NSW 2305, Australia; (S.M.T.); (M.J.C.)
| | - Mahsa Sarrami
- University of Newcastle, Callaghan, NSW 2308, Australia; (M.S.); (J.A.)
| | - Matthew Clapham
- Hunter Medical Research Institute, New Lambton Heights, NSW 2305, Australia;
| | - John Attia
- University of Newcastle, Callaghan, NSW 2308, Australia; (M.S.); (J.A.)
- Hunter Medical Research Institute, New Lambton Heights, NSW 2305, Australia;
| | - Zsolt J. Balogh
- John Hunter Hospital, Lookout Rd, New Lambton Heights, NSW 2305, Australia; (S.M.T.); (M.J.C.)
- University of Newcastle, Callaghan, NSW 2308, Australia; (M.S.); (J.A.)
- Correspondence:
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9
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Nelson MJ, Scott J, Sivalingam P. Evaluation of Nottingham Hip Fracture Score, Age-Adjusted Charlson Comorbidity Index and the Physiological and Operative Severity Score for the enumeration of Mortality and morbidity as predictors of mortality in elderly neck of femur fracture patients. SAGE Open Med 2020; 8:2050312120918268. [PMID: 32435482 PMCID: PMC7222650 DOI: 10.1177/2050312120918268] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 03/04/2020] [Indexed: 01/02/2023] Open
Abstract
Background: This study evaluated the use of several risk prediction models in estimating short- and long-term mortality following hip fracture in an Australian population. Methods: Data from 195 patients were retrospectively analysed and applied to three models of interest: the Nottingham Hip Fracture Score, the Age-Adjusted Charlson Comorbidity Index and the Physiological and Operative Severity Score for enUmeration of Mortality and Morbidity. The performance of these models was assessed with receiver operating characteristic curve as well as logistic regression modelling. Results: The median age of participants was 83 years and 69% were women. Ten percent of patients were deceased by 30 days, 25% at 6 months and 31% at 12 months post-operatively. While there was no statistically significant difference between the models, the Age-Adjusted Charlson Comorbidity Index had the largest area under the receiver operating characteristic curve for within 30 day and 12 month mortality, while the Nottingham Hip Fracture Score was largest for 6-month mortality. There was no evidence to suggest that the models were selecting a specific subgroup of our population, therefore, no indication was present to suggest that using multiple models would improve mortality prediction. Conclusions: While there was no statistically significant difference in mortality prediction, the Nottingham Hip Fracture Score is perhaps the best suited clinically, due to its ease of implementation. Larger prospective data collection across a variety of sites and its role in guiding clinical management remains an area of interest.
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Affiliation(s)
- Michael James Nelson
- Princess Alexandra Hospital, The University of Queensland, Brisbane, QLD, Australia.,Intensive Care Unit, St Vincent's Private Hospital Northside, Chermside, QLD, Australia
| | - Justin Scott
- Queensland Facility for Advanced Bioinformatics, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Palvannan Sivalingam
- Department of Anaesthesia, Princess Alexandra Hospital, The University of Queensland, Brisbane, QLD, Australia
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Abstract
The Asia-Pacific region includes countries with diverse cultural, demographic, and socio-political backgrounds. Countries such as Japan have very high life expectancy and an aged population. China and India, with a combined population over 2.7 billion, will experience a huge wave of ageing population with subsequent osteoporotic injuries. Australia will experience a similar increase in the osteoporotic fracture burden, and is leading the region by establishing a national hip fracture registry with governmental guidelines and outcome monitoring. While it is impossible to compare fragility hip fracture care in every Asia-Pacific country, this review of 4 major nations gives insight into the challenges facing diverse systems. They are united by the pursuit of internationally accepted standards of timely surgery, combined orthogeriatric care, and secondary fracture prevention strategies.
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Smith R, Perera BK, Chan DWC. Changes over time in hip fracture risk: Greater improvements in men compared to women. Clin Endocrinol (Oxf) 2018; 89:324-329. [PMID: 29885266 DOI: 10.1111/cen.13763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 06/05/2018] [Accepted: 06/06/2018] [Indexed: 11/27/2022]
Abstract
PURPOSE The aim of this study was to determine whether there has been a change in the mean age and age-standardized incidence of minimal trauma hip fractures in the Newcastle and Lake Macquarie population of Australia between 1998 and 2015. METHOD Patients with neck of femur fractures over 50 who presented to the regional referral centre were retrospectively identified using the ICD-9 and ICD-10 coding system. RESULTS There were 233 and 308 eligible patients in 1998 and 2015, respectively. For females, the mean age for hip fracture of 83.2 years in 1998 was not significantly different from the mean age of 84.5 years in 2015 (P = .16). For males, the mean age for hip fracture was significantly older at 84.6 years in 2015 compared to 80.4 years in 1998 (P = .005). For females, the decrease in the rate of hip fracture from 1998 to 2015 was 13% and was weakly statistically significant (IRR = 0.86, P = .05). For males, there was a statistically significant decrease in the rate of hip fractures from 1998 to 2015 by 33% (IRR = 0.67, P = .001). CONCLUSION Our study shows a decrease in age-standardized rates of hip fractures for men and women and suggests that men are demonstrating a greater improvement in bone health compared to women.
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Affiliation(s)
- Roger Smith
- Department of Endocrinology, John Hunter Hospital, Newcastle, NSW, Australia
| | | | - Daniela W C Chan
- Department of Endocrinology, John Hunter Hospital, Newcastle, NSW, Australia
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Haughom BD, Basques BA, Hellman MD, Brown NM, Della Valle CJ, Levine BR. Do Mortality and Complication Rates Differ Between Periprosthetic and Native Hip Fractures? J Arthroplasty 2018. [PMID: 29526336 DOI: 10.1016/j.arth.2018.01.046] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Epidemiological estimates indicate a rising incidence of periprosthetic hip fractures. While native hip fractures are known to be a highly morbid condition, a significant body of research has led to improved outcomes and decreased complications following these injuries. Comparatively, little research has evaluated the relative morbidity and mortality of periprosthetic hip fractures. The purpose of this study was to compare the morbidity and mortality of periprosthetic vs native hip fractures. METHODS Using the National Surgical Quality Improvement Program (NSQIP) database, 523 periprosthetic hip fractures were matched to native hip fractures using propensity scores. The 30-day rates of complications were compared using McNemar's test. A multivariate regression was then used to determine independent risk factors for mortality following periprosthetic fracture. RESULTS Mortality was similar between groups (periprosthetic: 2.7% vs native: 3.4%; P = .49). Periprosthetic fractures exhibited a greater rate of overall (63.1% vs 38.6%; P < .001) and minor complications (59.1% vs 34.4%; P < .001). There was an increased rate of return to the operating room (7.8% vs 3.1%; P < .001) and blood transfusion in the periprosthetic group (54.9% vs 30.2%; P = .001). Age greater than 85 (odds ratio 9.21) and dependent functional status (odds ratio 5.38) were both independent risk factors for mortality following periprosthetic fracture. CONCLUSIONS While native hip fractures are known to be highly morbid, our findings suggest that periprosthetic hip fractures have a similar mortality with significantly higher short-term morbidity. Future research is warranted to better understand risk factors and prevention strategies for complications in this subset of patients.
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Affiliation(s)
| | - Bryce A Basques
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL
| | | | - Nicholas M Brown
- Department of Orthopedic Surgery, Loyola University, Maywood, IL
| | - Craig J Della Valle
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL
| | - Brett R Levine
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL
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Carnevale V, Fontana A, Scillitani A, Sinisi R, Romagnoli E, Copetti M. Incidence and all-cause mortality for hip fracture in comparison to stroke, and myocardial infarction: a fifteen years population-based longitudinal study. Endocrine 2017; 58:320-331. [PMID: 28933053 DOI: 10.1007/s12020-017-1423-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 09/05/2017] [Indexed: 12/26/2022]
Abstract
PURPOSE This population-based study investigated the incidence, in-hospital and long-term all-cause mortality, for hip fracture (HipFx), stroke (STR), and myocardial infarction (MI) in residents hospitalized between 2000 and 2014. METHODS Data about hospitalization were drawn from the administrative discharge database, whereas information about residents and all-cause mortality from the municipality of our town. Patients were followed-up from the first hospital admission until death or study end. For each cause, crude and age-adjusted all-cause mortality of men and women were compared by Mann-Whitney's test and Poisson models. Separate age-sex adjusted Cox models were estimated and the corresponding adjusted survival curves were drawn. RESULTS Among 1292 hospitalizations (of 1109 patients), 434 were for HipFx, 526 for STR, 332 for MI (183 with and 149 without coronary revascularization -MIwCR and MIwoCR, respectively). The incidence of HipFx and STR did not vary over time, MI slightly increasing in men. Age-adjusted in-hospital mortality for HipFx was lower than for STR and MIwoCR in the whole sample and in women (p < 0.001), but not in men. After discharge, men with HipFx had shorter survival and higher crude and age-adjusted mortality rate than women. The estimated HRs(95%CI) in respect to patients with MIwCR (having the lowest mortality) were: 6.11(3.12-11.97), p < 0.001 for HipFx; 5.78(2.93-11.32), p < 0.001 for STR; 2.68(1.27-5.66), p = 0.010 for MIwoCR in the whole sample [HR: 16.58(6.70-40.98) p < 0.001 for HipFx; 7.35(3.01-17.93) p < 0.001 for STR, in men]. CONCLUSIONS HipFx markedly impacts hospital care, and causes high in-hospital and long-term all-cause mortality, comparable to the two commonest non-tumor causes of death.
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Affiliation(s)
- Vincenzo Carnevale
- Units of Internal Medicine, "Casa Sollievo della Sofferenza" Hospital, IRCCS, San Giovanni Rotondo, FG, Italy.
| | - Andrea Fontana
- Units of Biostatistics, "Casa Sollievo della Sofferenza" Hospital, IRCCS, San Giovanni Rotondo, FG, Italy
| | - Alfredo Scillitani
- Units of Endocrinology, "Casa Sollievo della Sofferenza" Hospital, IRCCS, San Giovanni Rotondo, FG, Italy
| | - Roberto Sinisi
- Health Statistics, "Casa Sollievo della Sofferenza" Hospital, IRCCS, San Giovanni Rotondo, FG, Italy
| | | | - Massimiliano Copetti
- Units of Biostatistics, "Casa Sollievo della Sofferenza" Hospital, IRCCS, San Giovanni Rotondo, FG, Italy
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Sheehan KJ, Sobolev B, Guy P. Mortality by Timing of Hip Fracture Surgery: Factors and Relationships at Play. J Bone Joint Surg Am 2017; 99:e106. [PMID: 29040134 DOI: 10.2106/jbjs.17.00069] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In hip fracture care, it is disputed whether mortality worsens when surgery is delayed. This knowledge gap matters when hospital managers seek to justify resource allocation for prioritizing access to one procedure over another. Uncertainty over the surgical timing-death association leads to either surgical prioritization without benefit or the underuse of expedited surgery when it could save lives. The discrepancy in previous findings results in part from differences between patients who happened to undergo surgery at different times. Such differences may produce the statistical association between surgical timing and death in the absence of a causal relationship. Previous observational studies attempted to adjust for structure, process, and patient factors that contribute to death, but not for relationships between structure and process factors, or between patient and process factors. In this article, we (1) summarize what is known about the factors that influence, directly or indirectly, both the timing of surgery and the occurrence of death; (2) construct a dependency graph of relationships among these factors based explicitly on the existing literature; (3) consider factors with a potential to induce covariation of time to surgery and the occurrence of death, directly or through the network of relationships, thereby explaining a putative surgical timing-death association; and (4) show how age, sex, dependent living, fracture type, hospital type, surgery type, and calendar period can influence both time to surgery and occurrence of death through chains of dependencies. We conclude by discussing how these results can inform the allocation of surgical capacity to prevent the avoidable adverse consequences of delaying hip fracture surgery.
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Affiliation(s)
- Katie Jane Sheehan
- 1Department of Physiotherapy, Division of Health and Social Care Research, Kings College London, London, United Kingdom 2School of Population and Public Health (B.S.) and Centre for Hip Health and Mobility (P.G.), University of British Columbia, Vancouver, British Columbia, Canada
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Sheehan KJ, Sobolev B, Guy P, Kuramoto L, Morin SN, Sutherland JM, Beaupre L, Griesdale D, Dunbar M, Bohm E, Harvey E. In-hospital mortality after hip fracture by treatment setting. CMAJ 2016; 188:1219-1225. [PMID: 27754892 DOI: 10.1503/cmaj.160522] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2016] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Where patients with hip fracture undergo treatment may influence their outcome. We compared the risk of in-hospital death after hip fracture by treatment setting in Canada. METHODS We examined all discharge abstracts from the Canadian Institute for Health Information with diagnosis codes for hip fracture involving patients 65 years and older who were admitted to hospital with a nonpathological first hip fracture between Jan. 1, 2004, and Dec. 31, 2012, in Canada (excluding Quebec). We compared the risk of in-hospital death, overall and after surgery, between teaching hospitals and community hospitals of various bed capacities, accounting for variation in length of stay. RESULTS Compared with the number of deaths per 1000 admissions at teaching hospitals, there were an additional 3 (95% confidence interval [CI] 1-6), 14 (95% CI 10-18) and 43 (95% CI 35-51) deaths per 1000 admissions at large, medium and small community hospitals, respectively. For the risk of in-hospital death overall, the adjusted odds ratios (ORs) were 1.05 (95% CI 0.99-1.11), 1.16 (95% CI 1.09-1.24) and 1.44 (95% CI 1.31-1.57) at large, medium and small community hospitals, respectively, compared with teaching hospitals. For the risk of postsurgical death in hospital, the adjusted ORs were 1.06 (95% CI 1.00-1.13), 1.13 (95% CI 1.04-1.23) and 1.18 (95% CI 0.87-1.60) at large, medium and small community hospitals, respectively. INTERPRETATION Compared with teaching hospitals, the risk of in-hospital death among patients with hip fracture was higher at medium and small community hospitals, and the risk of in-hospital death after surgery was higher at medium community hospitals. No differences were found between teaching and large community hospitals. Future research should examine the role of volume, demand and bed occupancy for observed differences.
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Affiliation(s)
- Katie J Sheehan
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que.
| | - Boris Sobolev
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Pierre Guy
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Lisa Kuramoto
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Suzanne N Morin
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Jason M Sutherland
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Lauren Beaupre
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Donald Griesdale
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Michael Dunbar
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Eric Bohm
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
| | - Edward Harvey
- School of Population and Public Health (Sheehan, Sobolev, Sutherland) and Department of Orthopedics (Guy), University of British Columbia, Vancouver, BC; Centre for Clinical Epidemiology and Evaluation (Kuramoto), Vancouver Coastal Health Research Institute, Vancouver, BC; Department of Medicine (Morin), McGill University, Montréal, Que.; Department of Physical Therapy and Division of Orthopaedic Surgery (Beaupre), University of Alberta, Edmonton, Alta.; Department of Anesthesiology, Pharmacology and Therapeutics (Griesdale), University of British Columbia, Vancouver, BC; Division of Orthopaedic Surgery (Dunbar), Dalhousie University, Halifax, NS; Division of Orthopaedic Surgery and Centre for Healthcare Innovation (Bohm), University of Manitoba, Winnipeg, Man.; Division of Orthopaedic Surgery (Harvey), McGill University, Montréal, Que
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Sheehan KJ, Sobolev B, Chudyk A, Stephens T, Guy P. Patient and system factors of mortality after hip fracture: a scoping review. BMC Musculoskelet Disord 2016; 17:166. [PMID: 27079195 PMCID: PMC4832537 DOI: 10.1186/s12891-016-1018-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Accepted: 04/07/2016] [Indexed: 12/03/2022] Open
Abstract
Background Several patient and health system factors were associated with the risk of death among patients with hip fracture. However, without knowledge of underlying mechanisms interventions to improve survival post hip fracture can only be designed on the basis of the found statistical associations. Methods We used the framework developed by Arksey and O’Malley and Levac et al. for synthesis of factors and mechanisms of mortality post low energy hip fracture in adults over the age of 50 years, published in English, between September 1, 2009 and October 1, 2014 and indexed in MEDLINE. Proposed mechanisms for reported associations were extracted from the discussion sections. Results We synthesized the evidence from 56 articles that reported on 35 patient and 9 system factors of mortality post hip fracture. For 21 factors we found proposed biological mechanisms for their association with mortality which included complications, comorbidity, cardiorespiratory function, immune function, bone remodeling and glycemic control. Conclusions The majority of patient and system factors of mortality post hip fracture were reported by only one or two articles and with no proposed mechanisms for their effects on mortality. Where reported, underlying mechanisms are often based on a single article and should be confirmed with further study. Therefore, one cannot be certain whether intervening on such factors may produce expected results.
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Affiliation(s)
- K J Sheehan
- School of Population and Public Health, University of British Columbia, Vancouver, Canada.
| | - B Sobolev
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
| | - A Chudyk
- Centre for Hip Health and Mobility, Vancouver, Canada
| | - T Stephens
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
| | - P Guy
- Centre for Hip Health and Mobility, Vancouver, Canada.,Department of Orthopaedics, University of British Columbia, Vancouver, Canada
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Sobolev B, Guy P, Sheehan KJ, Kuramoto L, Bohm E, Beaupre L, Sutherland JM, Dunbar M, Griesdale D, Morin SN, Harvey E. Time trends in hospital stay after hip fracture in Canada, 2004-2012: database study. Arch Osteoporos 2016; 11:13. [PMID: 26951050 DOI: 10.1007/s11657-016-0264-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 02/03/2016] [Indexed: 02/03/2023]
Abstract
UNLABELLED Changes in bed management and access policy aimed to shorten Canadian hip fracture hospital stay. Secular trends in hip fracture total, preoperative, and postoperative stay are unknown. Hip fracture stay shortened from 2004 to 2012, mostly from shortening postoperative stay. This may reflect changes in bed management rather than access policy. PURPOSE To compare the probability of discharge by time after patient admission to hospital with first-time hip fracture over a period of nine calendar years. METHODS We retrieved acute hospitalization records for 169,595 patients 65 years and older, who were admitted to an acute care hospital with hip fracture between 2004 and 2012 in Canada (outside of Quebec). The main outcome measure was cumulative incidence of discharge by inpatient day, accounting for competing events that end hospital stay. RESULTS The probability of surgical discharge within 30 days of admission increased from 57.2 % in 2004 to 67.3 % in 2012. The probability of undergoing surgery on day of admission or day after fluctuated around 58.5 % over the study period. For postoperative stay, the discharge probability increased from 6.8 to 12.2 % at day 4 after surgery and from 57.2 to 66.6 % at day 21 after surgery, between 2004 and 2012. The differences across years persisted after adjustment for characteristics of patients, fracture, comorbidity, treatment, type and timing of surgery, and access to care. CONCLUSIONS Hospital stay following hip fracture shortened substantially between 2004 and 2012 in Canada, mostly due to shortening of postoperative stays. Shorter hospital stays may reflect changes in bed management protocols rather than in access policy.
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Affiliation(s)
- Boris Sobolev
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada.
| | - Pierre Guy
- Department of Orthopedics, University of British Columbia, Vancouver, BC, Canada
| | - Katie Jane Sheehan
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada.
| | - Lisa Kuramoto
- Vancouver Coastal Health Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Eric Bohm
- Division of Orthopaedic Surgery and Center for Healthcare Innovation, University of Manitoba, Winnipeg, MB, Canada
| | - Lauren Beaupre
- Departments of Physical Therapy and Division of Orthopaedic Surgery, University of Alberta, Edmonton, AB, Canada
| | - Jason M Sutherland
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Michael Dunbar
- Division of Orthopaedic Surgery, Dalhousie University, Halifax, NS, Canada
| | - Donald Griesdale
- Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia, Vancouver, BC, Canada
| | - Suzanne N Morin
- Department of Medicine, McGill University, Montréal, QC, Canada
| | - Edward Harvey
- Division of Orthopaedic Surgery, McGill University, Montréal, QC, Canada
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Ireland AW, Kelly PJ, Cumming RG. State of origin: Australian states use widely different resources for hospital management of hip fracture, but achieve similar outcomes. AUST HEALTH REV 2016; 40:141-148. [DOI: 10.1071/ah14181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 05/26/2015] [Indexed: 01/01/2023]
Abstract
Objective
Hospital management of hip fracture varies widely with regard to length of stay, delivery of post-surgical care and costs. The present study compares the association between hospital utilisation and costs and patient outcomes in the six Australian states.
Methods
The present study was a retrospective cohort study of linked administrative databases for 2530 Australian veterans and war widows aged ≥65 years, hospitalised for hip fracture in 2008–09. Department of Veterans’ Affairs datasets for hospital episodes, residential aged care admissions and date of death were linked. Patient characteristics, hospital utilisation and process data, rates of mortality and residential care placement and delivery of community services were compared for patients from each of the states.
Results
There were no significant differences in fracture incidence, patient demographics or fracture type among the states. Adjusted total mean length of hospital stay ranged from 24.7 days (95% confidence interval (CI) 22.3–27.5 days) to 35.0 days (95% CI 32.6–37.6 days; P < 0.001) and adjusted total hospital cost ranged between A$24 792 (95% CI A$22 191–A$27 700) and A$35 494 (95% CI A$32 853–A$38 343; P < 0.001). Rates of referral to rehabilitation ranged from 31.7% to 50.4% (P = 0.003). At 1 year, there were no significant differences between states for key outcome determinants of mortality (P = 0.71) or for the proportion of patients who retained their independent living status (P = 0.66).
Conclusion
Hospital resources for management of hip fracture differ substantially among the Australian states. Key medium-term patient outcomes do not show significant differences. A potential for substantial cost-efficiencies without increased risk to patient welfare is suggested.
What is known about this topic?
Hospital resources deployed in the initial management of hip fracture differ widely between countries, regions and individual hospitals. Patient outcomes also vary widely, but are inconsistently associated with resource outlays.
What does this paper add?
The paper describes the different resource outlays for management of hip fracture in six Australian jurisdictions and the absence of equivalent differences in medium-term patient outcomes.
What are the implications for practitioners?
Efficiencies in hospital management of hip fracture may be achievable without negative consequences for patients. The elements of models of care should be examined for their contribution to early and later patient outcomes.
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Briani RV, Taborda B, Martines ÉCC, Aragão FA. Comparison of temporal and kinetic walking parameters among young people and falling and non-falling elderly persons. REVISTA BRASILEIRA DE GERIATRIA E GERONTOLOGIA 2015. [DOI: 10.1590/1809-9823.2015.14153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective : Comparison of the biomechanical parameters (spatiotemporal and kinetic) during walking of young people, falling, and non-falling elderly persons. Methods : A cross-sectional study was performed of 29 individuals divided into three groups: young persons (n=10); falling elderly individuals (n=7) and non-falling individuals (n=12). Gait analysis was performed based on the recording of three walking gait cycles along an 8 meter platform, which was attached to a force plate with a recording frequency of 200 Hz. Gait cycles were also recorded by three video cameras positioned perpendicular to the force plate with a recording frequency of 60 Hz. The data analyzed was: average step velocity, stance time, Froude number and anteroposterior ground reaction force. Results : The average step velocity was higher among young persons and there was no difference in the Froude number among the three groups. During the stance and impulse phase, anterior and posterior force was higher among young persons than in the non-falling elderly group. The foot stance time of young individuals was also lower than the non-falling elderly group (p=0.000) and the foot stance time of the falling elderly group was lower than that of the non-falling elderly group (p=0.004). Conclusion : Falling and non-falling elderly persons have different gait biomechanical characteristics than young women, other than with respect to the Froude number. Furthermore, falling elderly persons spend more time in the gait swing phase than non-falling elderly persons.
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Moulton LS, Green NL, Sudahar T, Makwana NK, Whittaker JP. Outcome after conservatively managed intracapsular fractures of the femoral neck. Ann R Coll Surg Engl 2015; 97:279-82. [PMID: 26263935 DOI: 10.1308/003588415x14181254788809] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION In 2012, 2.6% of hip-fracture patients in the UK were treated conservatively. There is little data on outcome for these patients. However, one study demonstrated that though 30-day mortality is higher, mortality over the rest of the year is comparable with that in surgical groups. Therefore, we assessed conservatively managed patients in our unit. METHODS Patients with intracapsular fractures of the femoral neck treated by conservative means between 2010 and 2012 inclusive were identified. Data were collected: American Society of Anaesthesiologists (ASA) grade, Nottingham Hip Fracture Score (NHFS), mobility, mortality (30 days and one year) and pain levels. RESULTS Thirty-two patients formed the study cohort. Mean age was 85.6 years. Median ASA grade was 4. Mortality at 30 days and one year was 31.3% and 56.3%, respectively. There was one case of pneumonia and one of infection. Pressure sores or venous thromboembolism were not documented. Three patients underwent surgery once their health improved. In general, mobility was decreased, but 30.8% of patients could mobilise with two aids or a frame. Only two cases had ongoing problems with pain. CONCLUSIONS Our data are similar to those published previously. Our patients were likely to have higher mortality data due to selection bias. Thirty-day mortality was significantly higher than the national average, but patients surviving 30 days had a prevalence of mortality similar to those managed by surgical means. Despite mobility decreasing from the pre-admission status, a considerable number of patients were free of pain and could mobilise. These data suggest that conservative management of intracapsular fractures of the femoral neck can produce acceptable results.
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Affiliation(s)
- Seth M. Tarrant
- Department of Traumatology; John Hunter Hospital and University of Newcastle; Newcastle New South Wales Australia
| | - Zsolt J. Balogh
- Department of Traumatology; John Hunter Hospital and University of Newcastle; Newcastle New South Wales Australia
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Risk factor profiles for early and delayed mortality after hip fracture: Analyses of linked Australian Department of Veterans' Affairs databases. Injury 2015; 46:1028-35. [PMID: 25813734 DOI: 10.1016/j.injury.2015.03.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 02/22/2015] [Accepted: 03/03/2015] [Indexed: 02/02/2023]
Abstract
INTRODUCTION One-year mortality after hip fracture may exceed 30% with a very large number of reported risk factors. Determinants of mortality beyond 1 year are rarely described. This study employs multiple data linkages to examine mortality rates, risk factor profiles and age-specific excess mortality at intervals from 30 days to 4 years. METHODS Retrospective cohort study of linked administrative datasets describing hospital episodes, residential aged care (RAC) admissions and date of death for 2552 Australian veterans and war widows hospitalised for hip fracture in 2008-09. Associations between time to death and patient age, sex, pre-fracture accommodation, fracture type, treatment options, selected comorbidities and complications were tested in Cox proportional hazards models. RESULTS In a population with mean age of 86.6 years (range 54-100 years), overall death rate was 11% at 30 days, 34% at 1 year, 47% at 2 years and 67% after 4 years. For males hospitalised from RAC 1-year mortality was 72%, contrasting with 19% for females from the community. Risk of death within 1 year was increased by male sex, increasing age, pre-fracture RAC residency, transfer to intensive care and coexistent cancer, cardiac and renal failure, cerebrovascular disease and pressure ulcers. Patients selected for rehabilitation had lower mortality rates. Patterns of determinants for mortality changed over time. Above-expected age-specific mortality was sustained for 4 years except for males 90 years and older. CONCLUSION Pre-fracture RAC residence was the strongest determinant factor for mortality. Patients selected for rehabilitation had lower mortality rates. The profiles of explanatory variables for death altered with increasing time from the index fracture event.
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Postoperative length of stay and 30-day readmission after geriatric hip fracture: an analysis of 8434 patients. J Orthop Trauma 2015; 29:e115-20. [PMID: 25210835 DOI: 10.1097/bot.0000000000000222] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To identify factors associated with increased postoperative length of stay (LOS) and readmission after surgical repair of geriatric hip fractures. METHODS Patients aged 70 years and older who underwent hip fracture surgery from January 2011 through December 2012 were identified in the American College of Surgeons National Surgical Quality Improvement Program database. Patient characteristics were tested for association with postoperative LOS and readmission using bivariate and multivariate analyses. RESULTS For the 8434 patients with hip fracture identified, the average age was 83.8 ± 5.9 years (mean ± SD), and 26.9% were male. Average postoperative LOS was 5.6 ± 6.0 days. Ten percent were readmitted within the first 30 postoperative days. Increased postoperative LOS of at least 1 full day was associated with increased time from admission to surgery, non-general anesthesia, and procedure type on multivariate analysis. Readmission was associated with increased age, male sex, body mass index ≥35 kg/m, American Society of Anesthesiologists class ≥3, pulmonary disease, hypertension, steroid use, dependent functional status, and discharge to a facility on multivariate analysis. CONCLUSIONS Ten percent of patients were readmitted after hip fracture repair in this national sample. Preoperative time to surgery, anesthesia type, and implant selection are 3 risk factors for increased LOS that can potentially be modified. A clinically significant risk factor for readmission was body mass index ≥35 kg/m, which was not associated with increased postoperative LOS. The identified risk factors illuminate opportunities for optimizing care for hip fracture patients aged 70 and older. LEVEL OF EVIDENCE Prognostic level II. See Instructions for Authors for a complete description of levels of evidence.
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Abstract
There is a high rate of mortality in elderly
patients who sustain a fracture of the hip. We aimed to determine
the rate of preventable mortality and errors during the management
of these patients. A 12 month prospective study was performed on
patients aged > 65 years who had sustained a fracture of the hip.
This was conducted at a Level 1 Trauma Centre with no orthogeriatric
service. A multidisciplinary review of the medical records by four
specialists was performed to analyse errors of management and elements
of preventable mortality. During 2011, there were 437 patients aged
> 65 years admitted with a fracture of the hip (85 years (66 to
99)) and 20 died while in hospital (86.3 years (67 to 96)). A total
of 152 errors were identified in the 80 individual reviews of the
20 deaths. A total of 99 errors (65%) were thought to have at least
a moderate effect on death; 45 reviews considering death (57%) were thought
to have potentially been preventable. Agreement between the panel
of reviewers on the preventability of death was fair. A larger-scale
assessment of preventable mortality in elderly patients who sustain
a fracture of the hip is required. Multidisciplinary review panels
could be considered as part of the quality assurance process in
the management of these patients. Cite this article: Bone Joint J 2014;96-B:1178–84.
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Affiliation(s)
- S M Tarrant
- John Hunter Hospital, Newcastle, University of Newcastle, Department of Traumatology, John Hunter Hospital and University of Newcastle, Locked Bag 1, Hunter Region Mail Centre, Newcastle, NSW, 2310, Australia
| | - B M Hardy
- John Hunter Hospital, Newcastle, University of Newcastle, Department of Traumatology, John Hunter Hospital and University of Newcastle, Locked Bag 1, Hunter Region Mail Centre, Newcastle, NSW, 2310, Australia
| | - P L Byth
- John Hunter Hospital, Newcastle, University of Newcastle, Department of Traumatology, John Hunter Hospital and University of Newcastle, Locked Bag 1, Hunter Region Mail Centre, Newcastle, NSW, 2310, Australia
| | - T L Brown
- John Hunter Hospital, Newcastle, University of Newcastle, Department of Traumatology, John Hunter Hospital and University of Newcastle, Locked Bag 1, Hunter Region Mail Centre, Newcastle, NSW, 2310, Australia
| | - J Attia
- John Hunter Hospital, Newcastle, University of Newcastle, Department of Traumatology, John Hunter Hospital and University of Newcastle, Locked Bag 1, Hunter Region Mail Centre, Newcastle, NSW, 2310, Australia
| | - Z J Balogh
- John Hunter Hospital, Newcastle, University of Newcastle, Department of Traumatology, John Hunter Hospital and University of Newcastle, Locked Bag 1, Hunter Region Mail Centre, Newcastle, NSW, 2310, Australia
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Radinovic K, Markovic-Denic L, Dubljanin-Raspopovic E, Marinkovic J, Milan Z, Bumbasirevic V. Estimating the effect of incident delirium on short-term outcomes in aged hip fracture patients through propensity score analysis. Geriatr Gerontol Int 2014; 15:848-55. [PMID: 25258087 DOI: 10.1111/ggi.12358] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/20/2014] [Indexed: 10/24/2022]
Abstract
AIM We aimed to evaluate the factors contributing to delirium after hip fracture and assess the effect of incident delirium on short-term clinical outcomes. METHODS A total of 270 non-delirious, consecutive hip fracture patients 60 years and older were included in a prospective cohort study. The patients were assessed with respect to physical status according to the American Society of Anesthesiologists classification, medical comorbidities with the Charlson Comorbidity Index, cognitive function with the Portable Mental Status Questionnaire and depression with the Geriatric Depressive Scale. Incident delirium was evaluated daily. Clinical outcomes and 1-month mortality were recorded. RESULTS Incident delirium was present in 53.0% of patients. Patients with delirium were older (P = 0.046), had higher American Society of Anesthesiologists and Charlson Comorbidity Index scores (P < 0.001), lower Portable Mental Status Questionnaire scores and higher Geriatric Depressive Scale scores (P < 0.001, P = 0.003, respectively). After adjusting for age, multivariate regression analysis in the first model showed that patients with delirium were at higher risk of reintervention plus death (P < 0.05), complications P < 0.001), a higher severity complication score (P < 0.05) and longer length of hospital stay (P < 0.001). In the second model, after adjusting for propensity score, patients with delirium were at higher risk of reintervention plus death (P < 0.05) and longer length of hospital stay (P < 0.01). CONCLUSIONS Patients who are older, with worse physical status, worse cognitive function and depression are more likely to develop delirium after hip fracture. Incident delirium has negative independent effects on short-term outcomes in elderly patients after hip fracture.
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Affiliation(s)
| | - Ljiljana Markovic-Denic
- Institute of Epidemiology, University of Belgrade, Belgrade, Serbia.,Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Emilija Dubljanin-Raspopovic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,Clinic for Physical Medicine and Rehabilitation, Clinical Center of Serbia, Belgrade, Serbia
| | - Jelena Marinkovic
- Institute of Medical Statistics and Medical Informatics, University of Belgrade, Belgrade, Serbia.,Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Vesna Bumbasirevic
- Clinic of Anesthesiology, Clinical Center of Serbia, Belgrade, Serbia.,Faculty of Medicine, University of Belgrade, Belgrade, Serbia
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Brozek W, Reichardt B, Kimberger O, Zwerina J, Dimai HP, Kritsch D, Klaushofer K, Zwettler E. Mortality after hip fracture in Austria 2008-2011. Calcif Tissue Int 2014; 95:257-66. [PMID: 24989776 DOI: 10.1007/s00223-014-9889-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 06/10/2014] [Indexed: 02/07/2023]
Abstract
Osteoporosis-related hip fractures represent a substantial cause of mortality and morbidity in industrialized countries like Austria. Identification of groups at high risk for mortality after hip fracture is crucial for health policy decisions. To determine in-hospital, long-term, and excess mortality after osteoporosis-related hip fracture in Austrian patients, we conducted a retrospective cohort analysis of pseudonymized invoice data from Austrian social insurance authorities covering roughly 98 % of the entire population. The data set included 31,668 subjects aged 50 years and above sustaining a hip fracture between July 2008 and December 2010 with follow-up until June 2011, and an age-, gender-, and regionally matched control population without hip fractures (56,320 subjects). Kaplan-Meier and Cox hazard regression analyses served to determine unadjusted and adjusted mortality rates: Unadjusted all-cause 1-year mortality amounted to 20.2 % (95 % CI: 19.7-20.7 %). Males had significantly higher long-term, in-hospital, and excess mortality rates than females, but younger males exhibited lower excess mortality than their female counterparts. Advanced age correlated with increased long-term and in-hospital mortality, but lower excess mortality. Excess mortality, particularly in males, was highest in the first 6 months after hip fracture, but remained statistically significantly elevated throughout the observation period of 3 years. Longer hospital stay per fracture was correlated with mortality reduction in older patients and in patients with more subsequent fractures. In conclusion, more efforts are needed to identify causes and effectively prevent excess mortality especially in male osteoporosis patients.
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Affiliation(s)
- Wolfgang Brozek
- Ludwig Boltzmann Institute of Osteology, Hanusch Hospital of the WGKK and AUVA Trauma Center, 1st Medical Department at Hanusch Hospital, Heinrich Collin Str. 30, 1140, Vienna, Austria,
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Restoration of hip architecture with bipolar hemiarthroplasty in the elderly: does it affect early functional outcome? Arch Orthop Trauma Surg 2014; 134:31-8. [PMID: 24202407 DOI: 10.1007/s00402-013-1878-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Reconstruction of the anatomic architecture correlates with functional outcome in patients receiving elective total hip arthroplasty. In theory similar rules should apply for bipolar hemiarthroplasty in femoral neck fractures. The influence of anatomic restoration after bipolar hemiarthroplasty on short-term clinical and functional outcome is explored in this study. PATIENTS AND METHODS Patients receiving bipolar hemiarthroplasty for intracapsular femoral neck fractures between 2010 and 2012 were included into a retrospective cohort study. Radiologic and functional outcome parameters were recorded during the acute care phase and geriatric rehabilitation. Postoperative mobilization data were recorded and co-morbidities documented for each case. Outcome parameters were obtained during geriatric rehabilitation: Barthel index, Tinetti score, Timed up and go test, Mini-Mental State Examination. The FO-ratio (ratio of femoral offset to the body weight lever arm), HC-ratio (ratio of the height of the hip center to the pelvic height) and the BWLA ratio (ratio of the body weight lever arm to the pelvic height) were obtained from postoperative radiographs. RESULTS A total of 193 patients with a median age of 84 (IQR = 78-94, 72% female) were analyzed. The in-hospital mortality rate was 5.7%. There was a high proportion of patients with prior co-morbidities (96% with at least one co-morbidity). During rehabilitation the Barthel index improved significantly (p < 0.001) from 40 to 55. The median Tinetti score on rehabilitation discharge was 15.5 (IQR = 10-19.5). The patients significantly improved in the timed up and go test from a median of 22 to 19 s. A significant difference (p < 0.001) was found comparing the FO ratios of the operated vs. non-operated side. None of the radiographic measures, representing the reconstructed anatomic hip geometry, significantly influenced the clinical and geriatric outcome. CONCLUSIONS Applying the short-term functional outcome scores used in this study, optimized anatomic restoration in hemiarthroplasty may not be a major influencing factor in a cohort of elder, multi-morbid patients.
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