Hospitalisations for fracture and associated costs between 2000 and 2009 in Ireland: a trend analysis

Metabolic bone health considerations in giant cell arteritis and polymyalgia rheumatica

Giant cell arteritis (GCA) and polymyalgia rheumatica (PMR) are two common systemic inflammatory conditions with a combined lifetime risk of approximately 3.5% in women and 1.5% in men. They are intimately associated with the aging process, virtually never occurring prior to 50 years of age and becoming more common over time. The reasons for this are unclear, but likely relate in part to factors related to aging of the immune system. The treatment of both GCA and PMR is traditionally based on glucocorticoids, frequently requiring a prolonged treatment course over long periods of time. Other medications are belatedly entering our treatment armamentarium, but their exact place in treatment algorithms remains to be fully defined and it is likely glucocorticoids will remain a cornerstone of our treatment in GCA and PMR for the foreseeable future. As a result, people with GCA and PMR will continue to be exposed to a significant cumulative glucocorticoid burden with all of the attendant potential adverse events, including osteoporosis. The predominantly post-menopausal female population that most commonly develops PMR and GCA is also the population that is most affected by osteoporosis. Given the risk of glucocorticoid-induced osteoporosis and subsequent fragility fractures, a planned treatment approach from glucocorticoid initiation is needed in these conditions. For the majority of patients, this will entail ensuring sufficiency of calcium and vitamin D as well as antiresorptive treatments. In this article, we discuss considerations around optimisation of metabolic bone health in GCA and PMR.

Osteoporotic fracture admissions compared to other major medical admissions in Irish public hospitals

Multinational reports suggest Ireland has one of the greatest illness burdens related to osteoporosis. Hospital care represents the costliest portion of health services. We found public hospital bed days for fragility fractures in Ireland increased by 43% between 2008 and 2017 which exceeded those for other common diseases.

INTRODUCTION

Recent multinational reports suggest Ireland has one of the greatest illness burdens related to osteoporosis, manifesting clinically as fragility fractures (FF). International reports show that FF incidence, rate of hospital admission and cost are similar or greater than those for breast cancer, myocardial infarction and stroke. Studies addressing the illness burden of osteoporosis in Ireland are few, and none compares fragility fractures to other common chronic diseases.

METHODS

A retrospective analysis of national administrative data for all public hospital admissions was performed on adults aged 50 years and older from January 2008 to December 2017.

RESULTS

In 2017, public hospital bed days for FF totalled 249,887 outnumbering Chronic Obstructive Pulmonary Disease (COPD): 131,897; 6 solid cancers (CA): 118,098; myocardial infarction (MI): 83,477; and diabetes mellitus (DM): 31,044. Bed days for FF increased by 43% between 2008 and 2017, in contrast to a 32%, 28% and 31% reduction for CA, MI and DM, respectively, and a 12% increase for COPD. Public hospital bed days for FF in 2016 were greater than MI, stroke, atrial fibrillation and chest pain combined but less than a combination of COPD, pneumonia and lower respiratory tract infection.

CONCLUSION

Osteoporotic fractures represent a large and rapidly increasing illness burden amongst older Irish adults, with substantial care requirements and the resulting onus on our healthcare system. Urgent action is needed to address this public health issue and the services for those at risk of fracture.

Cost of hospitalisation for hip fracture-findings from the Irish hip fracture database

The authors utilised the Irish Hip Fracture Database (IHFD) to quantify the impact of hip fracture on the health service in terms of incidence, bed days and financial costs. The absolute number of hip fracture cases recorded by the IHFD has increased, as has the associated costs of hospitalisation.

INTRODUCTION

Hip fracture places a considerable clinical and financial burden on the healthcare system, with acute hospitalisation accounting for a substantial proportion of the costs incurred. This paper aimed to quantify the cost of hospitalisation for hip fracture in Ireland in terms of bed days and direct hospital costs.

METHODS

The authors analysed 23,494 cases in the Irish Hip Fracture Database (IHFD) from 2014 to 2020. Case numbers and length of stay were analysed annually. Hospital costs for hip fracture were described using the 2020 Activity-Based Funding Price List, which outlines the fees paid to public hospitals for inpatient activity.

RESULTS

For the time period 2014-2020, the total cost of hospitalisation for hip fracture was approximately €296 million, equating to approximately €11,700 per episode of care. The annual cost of hospitalisation increased from approximately €34 million in 2014 to €44 million in 2020. In 2020, the mean length of stay for hip fracture was 17 days accounting for > 62,600 acute hospital bed days.

CONCLUSION

The absolute number of hip fracture cases recorded by the IHFD has increased, as has the cost of hospitalisation. Given the current capacity issues and economic constraints, there is a growing need to prioritise time spent in the most expensive acute hospital setting to the immediate perioperative period and maximise the use of community services and early supportive discharge for the rehabilitation phase.

Machine Learning Can Improve Clinical Detection of Low BMD: The DXA-HIP Study

BACKGROUND

Identification of those at high risk before a fracture occurs is an essential part of osteoporosis management. This topic remains a significant challenge for researchers in the field, and clinicians worldwide. Although many algorithms have been developed to either identify those with a diagnosis of osteoporosis or predict their risk of fracture, concern remains regarding their accuracy and application. Scientific advances including machine learning methods are rapidly gaining appreciation as alternative techniques to develop or enhance risk assessment and current practice. Recent evidence suggests that these methods could play an important role in the assessment of osteoporosis and fracture risk.

METHODS

Data used for this study included Dual-energy X-ray Absorptiometry (DXA) bone mineral density and T-scores, and multiple clinical variables drawn from a convenience cohort of adult patients scanned on one of 4 DXA machines across three hospitals in the West of Ireland between January 2000 and November 2018 (the DXA-Heath Informatics Prediction Cohort). The dataset was cleaned, validated and anonymized, and then split into an exploratory group (80%) and a development group (20%) using the stratified sampling method. We first established the validity of a simple tool, the Osteoporosis Self-assessment Tool Index (OSTi) to identify those classified as osteoporotic by the modified International Society for Clinical Densitometry DXA criteria. We then compared these results to seven machine learning techniques (MLTs): CatBoost, eXtreme Gradient Boosting, Neural network, Bagged flexible discriminant analysis, Random forest, Logistic regression and Support vector machine to enhance the discrimination of those classified as osteoporotic or not. The performance of each prediction model was measured by calculating the area under the curve (AUC) with 95% confidence interval (CI), and was compared against the OSTi.

RESULTS

A cohort of 13,577 adults aged ≥40 yr at the age of their first scan was identified including 11,594 women and 1983 men. 2102 (18.13%) females and 356 (17.95%) males were identified with osteoporosis based on their lowest T-score. The OSTi performed well in our cohort in both men (AUC 0.723, 95% CI 0.659-0.788) and women (AUC 0.810, 95% CI 0.787-0.833). Four MLTs improved discrimination in both men and women, though the incremental benefit was small. eXtreme Gradient Boosting showed the most promising results: +4.5% (AUC 0.768, 95% CI 0.706-0.829) for men and +2.3% (AUC 0.833, 95% CI 0.812-0.853) for women. Similarly MLTs outperformed OSTi in sensitivity analyses-which excluded those subjects taking osteoporosis medications-though the absolute improvements differed.

CONCLUSION

The OSTi retains an important role in identifying older men and women most likely to have osteoporosis by bone mineral density classification. MLTs could improve DXA detection of osteoporosis classification in older men and women. Further exploration of MLTs is warranted in other populations, and with additional data.

The Irish dual-energy X-ray absorptiometry (DXA) Health Informatics Prediction (HIP) for Osteoporosis Project

PURPOSE

The purpose of the Irish dual-energy X-ray absorptiometry (DXA) Health Informatics Prediction (HIP) for Osteoporosis Project is to create a large retrospective cohort of adults in Ireland to examine the validity of DXA diagnostic classification, risk assessment tools and management strategies for osteoporosis and osteoporotic fractures for our population.

PARTICIPANTS

The cohort includes 36 590 men and women aged 4-104 years who had a DXA scan between January 2000 and November 2018 at one of 3 centres in the West of Ireland.

FINDINGS TO DATE

36 590 patients had at least 1 DXA scan, 6868 (18.77%) had 2 scans and 3823 (10.45%) had 3 or more scans. There are 364 unique medical disorders, 186 unique medications and 46 DXA variables identified and available for analysis. The cohort includes 10 349 (28.3%) individuals who underwent a screening DXA scan without a clear fracture risk factor (other than age), and 9947 (27.2%) with prevalent fractures at 1 of 44 skeletal sites.

FUTURE PLANS

The Irish DXA HIP Project plans to assess current diagnostic classification and risk prediction algorithms for osteoporosis and fractures, identify the risk predictors for osteoporosis and develop novel, accurate and personalised risk prediction tools, by using the large multicentre longitudinal follow-up cohort. Furthermore, the dataset may be used to assess, and possibly support, multimorbidity management due to the large number of variables collected in this project.

A systematic review of the Irish osteoporotic vertebral fracture literature

INTRODUCTION

Vertebral fractures (VF) are the most common osteoporotic fracture. They are associated with significant morbidity and mortality and are an important predictor of future fractures. The epidemiology of VF in Ireland is limited and a greater understanding of their scale and impact is needed. Therefore, we conducted a systematic review of publications on osteoporotic VF in Ireland.

METHODS

Systematic searches were conducted using PubMed, Medline, Embase, Scopus and Cochrane electronic databases to identify eligible publications from Ireland addressing osteoporotic VF.

RESULTS

Twenty studies met the inclusion criteria out of 1558 citations. All studies were published since 2000. Data was obtained on 182,771 patients with fractures. Nine studies included more than 100 subjects and three included more than 1000. Females accounted for 70% with an overall mean age of 65.2 years (30-94). There was significant heterogeneity in study design, methods and outcome measures including the following: use of administrative claims data on public hospital admissions, surgical and medical interventions, the impact of a fracture liaison service and the osteoporosis economic burden. The prevalence of VF was difficult to ascertain due to definitions used and differences in the study populations. Only two studies systematically reviewed spine imaging using blinded assessors and validated diagnostic criteria to assess the prevalence of fractures in patient cohorts.

CONCLUSIONS

Several studies show that VF are common when addressed systematically and the prevalence may be rising. However, there is a deficit of large studies systematically addressing the epidemiology and their importance in Ireland.

Bypass: an integrated hip fracture care pathway

BACKGROUND

The incidence of hip fractures is expected to increase over the coming years, placing a greater burden on limited resources. A high volume of patients is brought to hospitals that do not have the resources necessary to provide definitive care. Optimal care involves a coordinated and integrated system of trauma care. The hip fracture care pathway introduced between a referring peripheral hospital and our institution represents a coordinated multidisciplinary approach to patient care.

AIMS

To describe and report on the outcomes over an 18-month period of the integrated hip fracture care pathway between referring peripheral hospitals and our institution.

METHODS

A retrospective analysis of the prospectively maintained hip fracture database over an 18-month period.

RESULTS

Between March 2017 and September 2018, 86 consecutive patients were referred to our institution through a new referral pathway. Of these, 69 patients came from the Emergency Department of the referring hospital and 17 arrived via bypass. All 86 patients were managed on a specialist orthopaedic ward. The average length of stay was 4.28 days, with maximum of 13 and minimum of 2 days. Over 84% of patients underwent definitive treatment within 48 h of a diagnosed hip fracture.

DISCUSSION

The fragmented approach to the management of trauma patients both in a pre-hospital and hospital care setting is a cause for concern. Our integrated hip fracture referral pathway, incorporating bypass of the referring hospital, represents a multidisciplinary care pathway for the management of patients with fractured neck of femur and can have potential benefits including improved patient outcomes, allowing the optimal allocation of resources and providing training opportunities.

The long-term outcomes following internal fixation for intracapsular hip fractures in an Irish tertiary referral centre

BACKGROUND

The burden associated with hip fractures is increasing worldwide. Arthroplasty procedures are more commonly performed for intracapsular fractures due to increased risk of compromise to the femoral head blood supply. However, we know from the Irish Hip Fracture Database that a significant proportion of these fractures undergo internal fixation.

AIMS

We sought to investigate the long-term outcomes for these patients including revision rates, functional outcome and mortality rates.

METHODS

All intracapsular fractures treated by internal fixation (IF) from 2005 to 2009 were identified. Pre-operative anatomical fracture location and level of fracture displacement was established. Hospital records were used to record mortality and revision rates. The modified Harris hip score was our primary functional outcome measure.

RESULT

One hundred twelve intracapsular fractures underwent IF over a 5-year period. The mean age was 68.6 (range 14-95 years). A mean follow-up time of 8.15 years (range 6.7-10.1 years) was achieved. There was a 5-year mortality rate of 36.6%. There was a significantly higher revision rate in displaced fractures (24.4%) than in undisplaced fractures (11.1%) (p = 0.01). We found no difference in functional outcome between displaced fractures [85.9 (± 16.9)] and undisplaced fractures [86.01 (± 18.8)]. Those aged younger than 65 at the time of surgery had a significantly better MHHS (p = 0.02) at long-term follow-up; however, there was a revision rate of 43.8% in this group.

CONCLUSION

Whilst a good functional outcome can be achieved with internal fixation, particularly in younger patients, the risk of requiring revision surgery approaches 50% for these patients.

The effect of indirect admission via hospital transfer on hip fracture patients in Ireland

BACKGROUND AND AIMS

Current best practice states that hip fracture patients should undergo surgery within 48 hours to minimise perioperative complications. There are 10 emergency departments (EDs) in Ireland that receive hip fracture patients without a trauma and orthopaedic surgery unit on site. Idle periods and duplicated preoperative investigations can lead to a prolonged time to surgery. The aim of this study was to identify the effect of admission route on the time to surgery, length of stay and pressure ulcer development in patients who sustain a hip fracture in Ireland.

METHODS

A retrospective cohort study was performed, using 2013 and 2014 data from the Irish Hip Fracture Database. Age, gender and ASA grade were identified as confounders and adjusted for accordingly.

RESULTS

Of the 3893 hip fractures identified, indirect admissions via hospital transfer occurred in 8.6% of cases. Surgery was performed within 48 h in 72.0% of indirect admission and 73.7% of direct admission cases (p = 0.502). The length of stay was significantly prolonged for patients admitted via hospital transfer (25.6 compared to 19.6 days, p < 0.001).

CONCLUSION

Delayed discharges post hip fracture have been shown to expose patients to increased perioperative morbidity and mortality rates, as well as reduced rehabilitation potential and less chance of returning home on discharge. This has significant cost implications for the health service and justifies the introduction of hospital bypass protocols for patients with hip fractures.

How accurate is the data provided to the Irish hip fracture database?

National databases, such as the Irish Hip Fracture Database (IHFD), are known to contain inaccuracies. The coordination of services, national funding and future research rely on the integrity of the IHFD so as to avoid policy and budget planning being based on misrepresentative data. An audit was performed to assess the accuracy of the 2016 IHFD data collected in our trauma unit. The Hospital In-Patient Enquiry (HIPE)-recorded fracture classification, IHFD-recorded fracture classification and IHFD-recorded operation performed for each hip fracture patient was identified. Each variable was compared with the classifications and procedures derived by the authors. Two hundred fifty-two cases were identified. The HIPE-recorded fracture classification was accurate in 29% of cases, and the IHFD-recorded fracture classification in 61% (p < 0.001). The IHFD-recorded operation performed was accurate in 76% of cases. Thirty-six cases (14%) were omitted by HIPE, and eight (3%) from the local IHFD (p < 0.001). Errors resulted from poor documentation, in determining the presence of fracture displacement, prosthesis coating and intramedullary nail length. Diagnoses and procedures were identified from ward and theatre logbooks that the data coordinator was unable to record. The data coordinator in our unit doubled the accuracy of the data, and reduced the rate of omitted cases by a factor of 4.5. Accuracy levels would be significantly improved with clear, thorough documentation by the medical team following education of junior surgical trainees on hip fracture classification and procedural coding. Inaccurate data has a negative effect on hospital reimbursement and compromises the integrity of the IHFD.

The effect of time to surgery on functional ability at six weeks in a hip fracture population in Mid-West Ireland

Patients with a hip fracture may be appropriately delayed for surgery as they require optimisation or clinical interventions to treat acute medical illnesses (Moja et al., 2012). Other patients are inappropriately delayed due to hospital factors (Brener, 2013; Lee & Elfar, 2014). Timely efficient admission and surgery is well documented as the best course of management for these patients. The aim of this prospective cohort longitudinal follow-up study was to establish if a relationship existed between duration of time spent in the Emergency Department (ED), time to surgery and functional ability in patients with hip fractures and to examine the effect prolonged waits may have on ability to return home. Functional ability for fifty one patients with a hip fracture was evaluated using the Barthel Index Score (BIS) on admission and at six weeks post-surgery. Data were analysed by using SPSS version 20. The findings reveal a change in BIS at 6 weeks for patients whose surgery is delayed. Patients who experienced long delays awaiting admission (>12 h) in the ED functioned less well (Kruskal-Wallis test p = 0.033). Correlation existed between time to surgery and returning to pre-fracture place of residence, (p = 0.000 Pearson chi-square), which also remained significant while controlling for age. Prolonged waits had an overall negative impact on patients' post-fracture functional ability. This study highlights the deleterious effects on functional ability when surgery is delayed.

Identifying Incomplete Atypical Femoral Fractures With Single-Energy Absorptiometry: Declining Prevalence

Background:

Atypical femur fractures (AFFs) are associated with long-term bisphosphonate (BP) therapy. Early identification of AFF prior to their completion provides an opportunity to intervene, potentially reducing morbidity associated with these fractures. Single-energy X-ray absorptiometry (SE) is an imaging method recently shown to detect incomplete AFF (iAFF) prior to fracture completion.

Methods:

Between May 2013 and September 2014, we assessed 173 patients who had been prescribed BP therapy for >5 years for iAFF using SE at their presentation for routine bone mineral density testing. We compared these findings with those of our previously published prospective study (n = 257) in which the femur was imaged for iAFF using dual-energy X-ray absorptiometry. In addition, we estimated the yearly prevalence of complete AFF among patients with subtrochanteric fracture at our institution from 2006 to 2014, and we evaluated prescribing trends for BP in Ireland from 2009 to 2014.

Results:

No patients had iAFF using SE femur compared with a prevalence of 2.7% in the earlier study. Between 2006 and 2014, we observed a rise and decline in AFFs at our hospital and a similar national trend in BP prescribing.

Conclusions:

AFFs appear to be decreasing. New customized scan modes of dual-energy X-ray absorptiometry systems, which visualize the entire femur at high image quality and take measurements, have the potential to identify iAFF prior to fracture completion and to ascertain those at highest risk of AFF.

Falling age-related incidence of hip fractures in women, but not men, in Northern Ireland: 2001-2011

Hip fractures place a large burden on healthcare and determining the variation in incidence is important to plan resources. We found, in Northern Ireland, that the age-related incidence for women is declining but the incidence for men and the total number of fractures remains static as the elderly population increases.

INTRODUCTION

Hip fractures place a significant burden on healthcare systems throughout the world. Recent studies have shown that the incidence is starting to decline or plateau. We aimed to study the incidence of hip fractures in 2001 and 2011 within Northern Ireland and hope to guide further service provision.

METHODS

The years 2001 and 2011 were selected as accurate census population data was available. The Hospital Inpatient System (HIS) database was used to collect the data and the search was carried out by a statistician using ICD codes S72.0 and S72.1.

RESULTS

The total incidence of hip fractures in the population aged 50 and over fell from 358 per 100,000 to 274 per 100,000. In females, the incidence fell from 513 to 412 per 100,000. In males, the incidence increased from 172 to 178 per 100,000. The total number of hip fractures remained static (1737 in 2001 and 1739 in 2011) as a result of an increase in the elderly population. Incidence and total number of femoral neck fractures (S72.0) declined while the incidence and total number of pertrochanteric fractures (S72.1) increased.

CONCLUSIONS

Our results are in keeping with the declining trend in hip fracture incidence in many Western countries, though we found that this is only true for women. The exact reasons for this remain unclear but are likely to be multifactorial. In the future, the number of fractures may increase further given the increasingly elderly population and further provision particularly for patients with pertrochanteric fractures will be required. Increased awareness, diagnosis and treatment of males with osteoporosis should be prioritised.

Trends in the incidence of hip fracture in Gran Canaria, Canary Islands, Spain: 2007-2011 versus 1989-1993

Hip fracture incidence in the Canaries was studied in two 5-year periods (1989-1993 and 2008-2011). The incidence in 2007-2011 was 24 % higher than in 1989, but did not differ between 2007-2011 and 1993. These findings suggest a trend to stabilize the incidence of hip fracture.

INTRODUCTION

A dramatic increase in hip fractures between 1988 and 2002 was reported in Northern Spain. We performed the present study in Gran Canaria, the Canary Islands, to compare changes in the incidence of hip fracture between 1989-1993 and 2007-2011.

METHODS

We recorded every osteoporotic hip fracture admitted to any hospital in Gran Canaria in the population 50 years of age or older.

RESULTS

In 1989-1993, we collected 1175 hip fractures (72 % women; mean age 78.2 ± 9.9 years), and the total incidence rate was 152.1 cases/100,000 population/year. In 2007-2011, we collected 2222 hip fracture cases (71 % women; mean age 79 ± 9.8 years). The total incidence was 180.9/100,000/year. A Poisson model showed that the incidence of fractures increased by 7.1 % (95 % CI = 3.1 %; 11.8 %) each year in 1989-1993, while there was no statistically significant variation (p = 0.515) during the period 2007-2011. The incidence in 2007-2011 was 24 % higher than in 1989 (first year in the first period) but did not differ between 2007-2011 and 1993 (the last year of the first period). Incidence rates were 76.7 % (95 % CI = 63.9 %; 90.5 %) higher in women than in men, but the female/male ratio remained unchanged. The age-adjusted incidence of hip fractures increased by 7.3 % each year from 1989 to 1993. The proportions of trochanter and cervical fractures were similar in the two time periods, but the mean hospital stay was reduced from 11 days in 1989-1993 to 7 days in 2007-2011.

CONCLUSIONS

These findings suggest a trend to stabilize the incidence of hip fracture in the Canary Islands due to a decrease in men, while in women, the incidence increased.

Epidemiologic patterns of injuries treated at the emergency department of a Swedish medical center

Background

The injury spectrum published in the literature has mainly been presented for a certain age group, as elderly or for a certain type of injury, as fracture and often restricted to in-hospital care cases. Our objective was to give an overview of the major types of injuries for all age groups and trends in the adult population.

Methods

We analyzed 68,159 adult injury events, which occurred between 1999 and 2008 and was treated at the Emergency Department of Umea University Hospital. All these injuries are registered in a database. The injuries were analyzed depending on frequency, type of injury, and activity at the time of injury. Incidence rates were calculated using population data from Statistics Sweden.

Results

Injury event incidence varied between 614 (2004) and 669 (2007) per 10,000 persons. The most common injury was a fracture, although contusions and wounds were also frequent. Fractures were responsible for almost three quarters of hospital days related to injury. The risk for fractures increased with age, as did contusions and concussions, whereas sprains decreased with age. Fracture incidence increased among the 50- to 59-year age group for both women and men. Fall-related injuries increased significantly for middle-aged adults. Sports-related and work injuries decreased, while injuries occurring during leisure time increased the most.

Conclusion

A fracture is the most frequent type of injury for adults and accounts for the largest proportion of the trauma care burden. Contusions are also common and responsible for a significant proportion of the in-hospital days. Injuries caused by a fall increased among middle-age adults imply a need for an extension of fall prevention programs.

Secular trends in hip fractures worldwide: opposing trends East versus West

Despite wide variations in hip rates fractures worldwide, reasons for such differences are not clear. Furthermore, secular trends in the age-specific hip fracture rates are changing the world map of this devastating disease, with the highest rise projected to occur in developing countries. The aim of our investigation is to systematically characterize secular trends in hip fractures worldwide, examine new data for various ethnic groups in the United States, evidence for divergent temporal patterns, and investigate potential contributing factors for the observed change in their epidemiology. All studies retrieved through a complex Medline Ovid search between 1966 and 2013 were examined. For each selected study, we calculated the percent annual change in age-standardized hip fracture rates de-novo. Although occurring at different time points, trend breaks in hip fracture incidence occurred in most Western countries and Oceania. After a steep rise in age-adjusted rates in these regions, a decrease became evident sometimes between the mid-seventies and nineties, depending on the country. Conversely, the data is scarce in Asia and South America, with evidence for a continuous rise in hip fracture rates, with the exception of Hong-Kong and Taiwan that seem to follow Western trends. The etiologies of these secular patterns in both the developed and the developing countries have not been fully elucidated, but the impact of urbanization is at least one plausible explanation. Data presented here show close parallels between rising rates of urbanization and hip fractures across disparate geographic locations and cultures. Once the proportion of the urban population stabilized, hip fracture rates also stabilize or begin to decrease perhaps due to the influence of other factors such as birth cohort effects, changes in bone mineral density and BMI, osteoporosis medication use and/or lifestyle interventions such as smoking cessation, improvement in nutritional status and fall prevention.

Geographic and ethnic disparities in osteoporotic fractures

Osteoporotic fractures are a major worldwide epidemic. Here, we review global variability, ethnic differences and secular changes in osteoporotic fractures. Worldwide, age-standardized incidence rates of hip fracture vary >200-fold in women and >140-fold in men when comparing the country in which incidence rates are the highest with that in which they are the lowest. Median age-standardized rates are highest in North America and Europe, followed by Asia, Middle East, Oceania, Latin America and Africa. Globally, rates of hip fracture are greater in women than in men, with an average ratio of ∼2:1. The incidence of radiographic vertebral fractures is much higher than that of hip fractures, whereas the incidence rates of clinical vertebral fractures mirror hip fracture rates in most countries. Methodological challenges of defining and ascertaining vertebral fractures limit the interpretation of these data. Secular declines in hip fracture rates have been reported in populations from North America, Europe and Oceania. These declines are especially notable in women, suggesting that reproductive factors might contribute to this reduction. By contrast, hip fracture rates are increasing in parts of Asia and Latin America. Global indicators of health, education and socioeconomic status are positively correlated with fracture rates suggesting that lifestyles in developed countries might contribute to hip fracture. Improvements in fracture assessment, in particular for nonhip fractures, and identification of factors that contribute to this variability might substantially influence our understanding of osteoporotic fracture aetiology and provide new avenues for prevention.

Cost-effectiveness analysis of hip fracture prevention with vitamin D supplementation: a Markov micro-simulation model applied to the French population over 65 years old without previous hip fracture

We performed a cost-effectiveness analysis of four vitamin D supplementation strategies for primary prevention of hip fracture among the elderly population and found that the most cost-effective strategy was screening for vitamin D insufficiency followed by adequate treatment to attain a minimum 25(OH) serum level.

INTRODUCTION

Vitamin D supplementation has a demonstrated ability to reduce the incidence of hip fractures. The efficiency of lifetime supplementation has not yet been assessed in the population over 65 years without previous hip fracture. The objective was to analyze the efficiency of various vitamin D supplementation strategies for that population.

METHODS

A Markov micro-simulation model was built with data extracted from published studies and from the French reimbursement schedule. Four vitamin D supplementation strategies were evaluated on our study population: (1) no treatment, (2) supplementation without any serum level check; (3) supplementation with a serum level check 3 months after initiation and subsequent treatment adaptation; (4) population screening for vitamin D insufficiency followed by treatment based on the vitamin D serum level.

RESULTS

"Treat, then check" and "screen and treat" were two cost-effective strategies and dominated "treat without check" with incremental cost-effectiveness ratios of €5,219/quality-adjusted life-years (QALY) and €9,104/QALY, respectively. The acceptability curves showed that over €6,000/QALY, the "screen and treat" strategy had the greatest probability of being cost-effective, and the "no treatment" strategy would never be cost-effective if society were willing to spend over €8,000/QALY. The sensitivity analysis showed that among all parameters varying within realistic ranges, the cost of vitamin D treatment had the greatest effect and yet remained below the WHO cost-effectiveness thresholds.

CONCLUSIONS

Population screening for vitamin D insufficiency followed by treatment based on the vitamin D serum level is the most cost-effective strategy for preventing hip fracture occurrence in the population over 65 years old.

Optimizing fracture prevention: the fracture liaison service, an observational study

The response rate to the invitation to the fracture liaison service and reasons for non-response were evaluated in 2,207 fragility fracture patients. Fifty-one percent responded; non-responders were most often not interested (38 %) or were hip fracture patients. After 1 year of treatment, 88 % was still persistent and 2 % had a new fracture.

INTRODUCTION

To increase the percentage of elderly fracture patients undergoing a dual energy x-ray absorptiometry (DXA) measurement, and to investigate why some patients did not respond to invitation to our fracture liaison service (FLS).

METHODS

In four Dutch hospitals, fracture patients ≥ 50 years were invited through a written or personal invitation at the surgical outpatient department, for a DXA measurement and visit to our FLS. Patients who did not respond were contacted by telephone. In patients diagnosed with osteoporosis, treatment was started. Patients were contacted every 3 months during 1 year to assess drug persistence and the occurrence of subsequent fractures.

RESULTS

Of the 2,207 patients who were invited, 50.6 % responded. Most frequent reasons for not responding included: not interested (38 %), already screened/under treatment for osteoporosis (15.7 %), physically unable to attend the clinic (11.5 %), and death (5.2 %). Hip fracture patients responded less frequently (29 %) while patients with a wrist (60 %) or ankle fracture (65.2 %) were more likely to visit the clinic. In 337 responding patients, osteoporosis was diagnosed and treatment was initiated. After 12 months of follow-up, 88 % of the patients were still persistent with anti-osteoporosis therapy and only 2 % suffered a subsequent clinical fracture.

CONCLUSION

In elderly fracture patients, the use of a FLS leads to an increased response rate, a high persistence to drug treatment, and a low rate of subsequent clinical fractures. Additional programs for hip fracture patients are required, as these patients have a low response rate.

Indirect costs account for half of the total costs of an osteoporotic fracture: a prospective evaluation

Data on direct and indirect costs of clinical fractures in 116 osteoporotic patients 50 years and older were prospectively collected using cost diaries. Indirect costs accounted for roughly half of the total costs, with a contribution of at least 81% of these costs in employed patients.

INTRODUCTION

The aim of this prospective study was to gain insight into the current total costs of clinical fractures in osteoporotic patients aged 50 years and older.

METHODS

In a study in the Netherlands, patients prospectively filled out cost diaries every 3 months, during 1 year after a clinical fracture. Primary analyses were performed on those patients with all four cost diaries returned. In-depth analyses of indirect costs were performed, dividing results for employed and unemployed patients. Sensitivity analyses using imputation techniques were performed on patients who returned two or three diaries

RESULTS

Of the 116 included patients, 69 completed all four diaries, 24 only two or three, and 23 patient completed one or no diaries. For all fractures, approximately 50% of the total costs were due to indirect costs; employed patients contributed for at least 81% of the indirect cost. Humerus fractures were most expensive with a total 1-year cost of €16.841 per patient. Indirect costs in the group with clinical spine fractures were highest (<euro>12.522), accounting for 89.1% of the total costs for this fracture.

CONCLUSION

Indirect costs account for roughly half of the total costs of clinical fractures, which are largely related to sick leave. When performing cost analyses in fracture patients, we advise a societal perspective in which indirect costs are also considered, and to apply a patient derived prospective data collection method to get a 'true' and complete image of the total costs due to clinical fractures.

Temporal trends in the incidence of osteoporotic fractures

Osteoporotic fractures are associated with excess mortality and decreased functional capacity and quality of life. Age-standardized incidence rates of fragility fractures, particularly of the hip and forearm, have been noted to be decreasing in the last decade across many countries with the notable exception of Asia. The causes for the observed changes in fracture risk have not been fully identified but are likely the result of multiple factors, including birth cohort and period effects, increasing obesity, and greater use of anti-osteoporosis medications. Changing rates of fragility fractures would be expected to have an important impact on the burden of osteoporosis.

A 12-year ecological study of hip fracture rates among older Taiwanese adults

Hip fracture rates in Taiwan are among the highest in the world. The aim of this study was to describe the trends of hip fracture hospitalizations among Taiwanese elderly (aged ≥ 65 years) and the trends of antiosteoporosis medication expenditure from 1999 to 2010. We conducted an ecological study using inpatient health care-utilization data from the Department of Health, and medication expenditure data from the IMS Health, Taiwan. The International Classification of Disease, Clinical Modification, 9th version, code 820 was used to identify hip fracture hospitalizations. Medications included alendronate, calcitonin, ibandronate, raloxifene, strontium ranelate, teriparatide, and zoledronic acid. Year 2010 was assigned as the reference point for age-standardized rates, currency exchange (to the US dollar), and discount rates. Over the 12-year study period, age-standardized hip fracture hospitalizations decreased by 2.7 % annually (p for trend < 0.001) for Taiwanese elders. The decline was more obvious among those aged ≥75 years (6.1 %). However, the number of hip fracture hospitalizations increased from 14,342 to 18,023. Total hospitalization costs increased by US$0.6 ± 0.2 million annually (p for trend = 0.002); however, the per capita costs decreased by US$23.0 ± 8.0 (p for trend = 0.017). The total medication expenditure increased 7.2-fold, from US$8.1 million to US$58.9 million, accounting for an increase in the overall pharmaceutical market by fivefold, from 3.4 to 15.9 ‰ (both p for trend < 0.001). From 1999 to 2010, there was a decline in hip fracture rates among elderly Taiwanese adults with a concomitant increase in antiosteoporosis medication expenditure.

Development and application of FRAX in the management of osteoporosis in Ireland

SUMMARY

The Irish Fracture Risk Assessment (FRAX) tool is the first fracture prediction model that has been calibrated using national hip fracture incidence data and Irish mortality rates. The Irish FRAX tool can be used to identify intervention thresholds for Ireland based on the fracture probability equivalent to that of a woman with a prior fracture.

OBJECTIVES

The objective of the study is to describe the 10-year probability of osteoporotic fracture in men and women in Ireland by using the Irish version of the FRAX tool and to develop FRAX-based intervention thresholds.

METHODS

The FRAX model for Ireland was constructed from the age- and sex-stratified hip fracture incidence rates from 2008 to 2010. For other major osteoporotic fractures, incidence rates were imputed, using age- and sex-specific Swedish ratios for hip to osteoporotic fracture risks. Lifetime fracture probabilities and 10-year probabilities of a major osteoporotic fracture were calculated in women to determine potential intervention thresholds.

RESULTS

Based on the incidence of hip fracture and mortality, the average lifetime probability of hip fracture from the age of 50 years was 7.8% in men and 18.2% in women from Ireland. Probability-based intervention threshold derived from BMD T-scores were problematic. When a BMD T-score≤-2.5 standard deviations (SD) was used as an intervention threshold, the increase in risk associated with the BMD threshold decreased progressively with age such that, at the age of 80 years or more, a T-score of -2.5 SD was protective. The 10-year probability of a major osteoporotic fracture by age, equivalent to that of women with a previous fracture, rose with age, from 3.0% at the age of 40 years to 30% at the age of 90 years, and identified women at increased risk at all ages.

CONCLUSION

The Irish FRAX tool is the first fracture prediction model that has been calibrated using national hip fracture incidence data and Irish mortality rates.

Comparison of prescribing and adherence patterns of anti-osteoporotic medications post-admission for fragility type fracture in an urban teaching hospital and a rural teaching hospital in Ireland between 2005 and 2008

INTRODUCTION

Poor adherence reduces the potential benefits of osteoporosis therapy, lowering gains in bone mineral density resulting in increased risk of fractures.

AIM

To compare prescribing and adherence patterns of anti-osteoporotic medications in patients admitted to an urban teaching hospital in Ireland with a fragility type fracture to patients admitted to a rural hospital in the North Western region.

METHODOLOGY

We identified all patients >55 years admitted to Sligo General Hospital between 2005 and 2008 with a fragility fracture (N = 744) using the hospital in-patient enquiry system (HIPE). The medical card number of those patients eligible for the primary care reimbursement services scheme (PCRS) facilitated the linkage of the HSE-PCRS scheme database to the HIPE database which enabled a study to identify persistence rates of patients prescribed osteoporosis therapy after discharge. The results were compared to the findings of a similar study carried out in St. James's Hospital, Dublin.

RESULTS

The 12 months post-fracture prescribing increased from 11.0 % (95 % CI 9.6, 12.4) in 2005 to 47 % (95 % CI 43.6, 50.3) in 2008 in the urban setting and from 25 % (95 % CI 21.5, 28.9) to 39 % (95 % CI 34.5, 42.7) in the rural setting. Adherence levels to osteoporosis medications at 12 months post-initiation of therapy was <50 % in both study groups. Patients on less frequent dosing regimes were better adherers.

CONCLUSION

The proportion of patients being discharged on anti-osteoporosis medications post-fragility fracture increased between 2005 and 2008 in both patient groups. Sub-optimal adherence levels to osteoporosis medications continue to be a major concern.