Individual fracture risk and the cost-effectiveness of bisphosphonates in patients using oral glucocorticoids

Cost Effectiveness Analyses of Interventions for Osteoporosis in Men: A Systematic Literature Review

BACKGROUND

Osteoporosis is often considered to be a disease of women. Over the last few years, owing to the increasing clinical and economic burden, the awareness and imperative for identifying and managing osteoporosis in men have increased substantially. With the approval of agents to treat men with osteoporosis, more economic evaluations have been conducted to assess the potential economic benefits of these interventions. Despite this concern, there is no specific overview of cost-effectiveness analyses for the treatment of osteoporosis in men.

OBJECTIVES

This study aims (1) to systematically review economic evaluations of interventions for osteoporosis in men; (2) to critically appraise the quality of included studies and the source of model input data; and (3) to investigate the comparability of results for studies including both men and women.

METHODS

A literature search mainly using MEDLINE (via Ovid) and Embase databases was undertaken to identify original articles published between 1 January, 2000 and 30 June, 2022. Studies that assessed the cost effectiveness of interventions for osteoporosis in men were included. The Economic Aspects of Osteoporosis, Osteoarthritis and Musculoskeletal Diseases and the International Osteoporosis Foundation osteoporosis-specific guideline was used to assess the quality of design, conduct, and reporting of included studies.

RESULTS

Of 2973 articles identified, 25 studies fulfilled the inclusion criteria, classified into economic evaluations of active drugs (n = 8) or nutritional supplements (n = 4), intervention thresholds (n = 5), screening strategies (n = 6), and post-fracture care programs (n = 2). Most studies were conducted in European countries (n = 15), followed by North America (n = 9). Bisphosphonates (namely alendronate) and nutritional supplements were shown to be generally cost effective compared with no treatment in men over 60 years of age with osteoporosis or prior fractures. Two other studies suggested that denosumab was cost effective in men aged 75 years and older with osteoporosis compared with bisphosphates and teriparatide. Intervention thresholds at which bisphosphonates were found to be cost effective varied among studies with a 10-year probability of a major osteoporotic fracture that ranged from 8.9 to 34.2% for different age categories. A few studies suggested cost effectiveness of screening strategies and post-fracture care programs in men. Similar findings regarding the cost effectiveness of drugs and intervention thresholds in women and men were captured, with slightly greater incremental cost-effectiveness ratios in men. The quality of the studies included had an average score of 18.8 out of 25 (range 13-23.5). Hip fracture incidence and mortality risk were mainly derived from studies in men, while fracture cost, treatment efficacy, and disutility were commonly derived from studies in women or studies combining both sexes.

CONCLUSIONS

Anti-osteoporosis drugs and nutritional supplements are generally cost effective in men with osteoporosis. Screening strategies and post-fracture care programs also showed economic benefits for men. Cost-effectiveness and intervention thresholds were generally similar in studies conducted in both men and women, with slightly greater incremental cost-effectiveness ratios in men.

Prevention and Treatment of Glucocorticoid-Induced Osteoporosis in Adults: Consensus Recommendations From the Belgian Bone Club

Glucocorticoids are effective immunomodulatory drugs used for many inflammatory disorders as well as in transplant recipients. However, both iatrogenic and endogenous glucocorticoid excess are also associated with several side effects including an increased risk of osteoporosis and fractures. Glucocorticoid-induced osteoporosis (GIOP) is a common secondary cause of osteoporosis in adults. Despite availability of clear evidence and international guidelines for the prevention of GIOP, a large treatment gap remains. In this narrative review, the Belgian Bone Club (BBC) updates its 2006 consensus recommendations for the prevention and treatment of GIOP in adults. The pathophysiology of GIOP is multifactorial. The BBC strongly advises non-pharmacological measures including physical exercise, smoking cessation and avoidance of alcohol abuse in all adults at risk for osteoporosis. Glucocorticoids are associated with impaired intestinal calcium absorption; the BBC therefore strongly recommend sufficient calcium intake and avoidance of vitamin D deficiency. We recommend assessment of fracture risk, taking age, sex, menopausal status, prior fractures, glucocorticoid dose, other clinical risk factors and bone mineral density into account. Placebo-controlled randomized controlled trials have demonstrated the efficacy of alendronate, risedronate, zoledronate, denosumab and teriparatide in GIOP. We suggest monitoring by dual-energy X-ray absorptiometry (DXA) and vertebral fracture identification one year after glucocorticoid initiation. The trabecular bone score might be considered during DXA monitoring. Extended femur scans might be considered at the time of DXA imaging in glucocorticoid users on long-term (≥ 3 years) antiresorptive therapy. Bone turnover markers may be considered for monitoring treatment with anti-resorptive or osteoanabolic drugs in GIOP. Although the pathophysiology of solid organ and hematopoietic stem cell transplantation-induced osteoporosis extends beyond GIOP alone, the BBC recommends similar evaluation, prevention, treatment and follow-up principles in these patients. Efforts to close the treatment gap in GIOP and implement available effective fracture prevention strategies into clinical practice in primary, secondary and tertiary care are urgently needed.

Glucocorticoid-induced osteoporosis: 2019 concise clinical review

Glucocorticoids remain widely used for many medical conditions, and fractures are the most serious common adverse event related to long-term glucocorticoid use. Glucocorticoid-induced osteoporosis (GIOP) develops in a time- and dose-dependent manner, but even at low doses, an increased risk of fragility fracture may be observed even within the first month of treatment. GIOP is mediated by multiple pathophysiologic mechanisms resulting in an inhibition of bone formation and an increase in bone resorption. The clinical assessment of GIOP has potential pitfalls since dual-energy X-ray absorptiometry (DXA) may underestimate the risk of fracture in patients treated with glucocorticoids. Many national organizations have developed guidelines for assessing fracture risk and treating patients with, or at risk for, GIOP. These groups advocate both antiresorptive agents and bone-forming agents based predominately on their efficacy in improving bone mineral density. Oral bisphosphonates are generally the first-line therapy for GIOP in most patients due to their proven efficacy, good safety, and low cost. For those patients at greater risk of fracture, teriparatide should be considered earlier, based on its ability to significantly reduce vertebral fractures when compared with alendronate. GIOP remains a major public health concern that is at least partially preventable with current and potential future therapeutic options.

A systematic review and economic evaluation of bisphosphonates for the prevention of fragility fractures

BACKGROUND

Fragility fractures are fractures that result from mechanical forces that would not ordinarily result in fracture.

OBJECTIVES

To evaluate the clinical effectiveness and safety of bisphosphonates [alendronic acid (Fosamax^® and Fosamax^® Once Weekly, Merck Sharp & Dohme Ltd), risedronic acid (Actonel^® and Actonel Once a Week^®, Warner Chilcott UK Ltd), ibandronic acid (Bonviva^®, Roche Products Ltd) and zoledronic acid (Aclasta^®, Novartis Pharmaceuticals UK Ltd)] for the prevention of fragility fracture and to assess their cost-effectiveness at varying levels of fracture risk.

DATA SOURCES

For the clinical effectiveness review, six electronic databases and two trial registries were searched: MEDLINE, EMBASE, The Cochrane Library, Cumulative Index to Nursing and Allied Health Literature, Web of Science and BIOSIS Previews, Clinicaltrials.gov and World Health Organization International Clinical Trials Registry Platform. Searches were limited by date from 2008 until September 2014.

REVIEW METHODS

A systematic review and network meta-analysis (NMA) of effectiveness studies were conducted. A review of published economic analyses was undertaken and a de novo health economic model was constructed. Discrete event simulation was used to estimate lifetime costs and quality-adjusted life-years (QALYs) for each bisphosphonate treatment strategy and a strategy of no treatment for a simulated cohort of patients with heterogeneous characteristics. The model was populated with effectiveness evidence from the systematic review and NMA. All other parameters were estimated from published sources. A NHS and Personal Social Services perspective was taken, and costs and benefits were discounted at 3.5% per annum. Fracture risk was estimated from patient characteristics using the QFracture^® (QFracture-2012 open source revision 38, Clinrisk Ltd, Leeds, UK) and FRAX^® (web version 3.9, University of Sheffield, Sheffield, UK) tools. The relationship between fracture risk and incremental net benefit (INB) was estimated using non-parametric regression. Probabilistic sensitivity analysis (PSA) and scenario analyses were used to assess uncertainty.

RESULTS

Forty-six randomised controlled trials (RCTs) were included in the clinical effectiveness systematic review, with 27 RCTs providing data for the fracture NMA and 35 RCTs providing data for the femoral neck bone mineral density (BMD) NMA. All treatments had beneficial effects on fractures versus placebo, with hazard ratios varying from 0.41 to 0.92 depending on treatment and fracture type. The effects on vertebral fractures and percentage change in BMD were statistically significant for all treatments. There was no evidence of a difference in effect on fractures between bisphosphonates. A statistically significant difference in the incidence of influenza-like symptoms was identified from the RCTs for zoledronic acid compared with placebo. Reviews of observational studies suggest that upper gastrointestinal symptoms are frequently reported in the first month of oral bisphosphonate treatment, but pooled analyses of placebo-controlled trials found no statistically significant difference. A strategy of no treatment was estimated to have the maximum INB for patients with a 10-year QFracture risk under 1.5%, whereas oral bisphosphonates provided maximum INB at higher levels of risk. However, the PSA suggested that there is considerable uncertainty regarding whether or not no treatment is the optimal strategy until the QFracture score is around 5.5%. In the model using FRAX, the mean INBs were positive for all oral bisphosphonate treatments across all risk categories. Intravenous bisphosphonates were estimated to have lower INBs than oral bisphosphonates across all levels of fracture risk when estimated using either QFracture or FRAX.

LIMITATIONS

We assumed that all treatment strategies are viable alternatives across the whole population.

CONCLUSIONS

Bisphosphonates are effective in preventing fragility fractures. However, the benefit-to-risk ratio in the lowest-risk patients may be debatable given the low absolute QALY gains and the potential for adverse events. We plan to extend the analysis to include non-bisphosphonate therapies.

STUDY REGISTRATION

This study is registered as PROSPERO CRD42013006883.

FUNDING

The National Institute for Health Research Health Technology Assessment programme.

Cost-effectiveness of bisphosphonates for prevention of fracture related to glucocorticoid-induced osteoporosis in Malaysia

INTRODUCTION

Glucocorticoid therapy is associated with an appreciable risk of bone loss leading to fractures that require expensive treatments. This study aimed to evaluate the cost-effectiveness of bisphosphonates for prevention of hip fracture in glucocorticoid-induced osteoporosis (GIOP) in Malaysia.

METHOD

Retrospective data were collected from GIOP patients referred to the Universiti Kebangsaan Malaysia Medical Centre. Fracture events and direct medical costs were compared between bisphosphonates and calcium/vitamin D combination.

RESULTS

Fracture events were reported in 28 out of 93 included patients, with hip and vertebral fractures representing 42.9% and 35.7%, respectively. Overall, the use of bisphosphonates could not be considered cost-effective for treatment of all GIOP patients. The presence of certain fracture risk factors was able to modify the cost-effectiveness of bisphosphonates. Bisphosphonates was considered cost-effective if started in patients more than 60 years old. However, the use of bisphosphonates was not cost-effective in GIOP patients with secondary osteoporosis. The incremental cost-effectiveness ratios (ICER) of bisphosphonates in patients with risk factors of previous fracture or rheumatoid arthritis were Malaysian Ringgits (MYR) 108 603.40 and MYR 25 699.21, respectively.

CONCLUSION

Fracture risk factors of age, previous fracture, rheumatoid arthritis and secondary osteoporosis may modify the cost-effectiveness outcomes of bisphosphonates. Bisphosphonates would be considered cost-effective in patients more than 60 years old as compared to calcium/vitamin D treatments. Further evaluation of the impact of fracture risk factors in larger populations would provide more precise information to better assist rational and economical use of anti-osteoporosis treatment in GIOP patients.

Prevalence of posttraumatic arthritis and the association with outcome measures following distal radius fractures in non-osteoporotic patients: a systematic review

INTRODUCTION

The objective of this systematic review was to analyze (1) prevalence of radiological posttraumatic arthritis (PA), (2) associations of PA with outcome measures and (3) predictors of PA following distal radius fractures in non-osteoporotic patients.

MATERIALS AND METHODS

Nineteen studies were included (10 open source data).

RESULTS

In total, 733 patients were described with a weighted mean age of 37 years (range 25-54) at the time of the injury. Follow-up ranged from 13 months to 38 years. Overall prevalence of PA was 50% and 37% in the open source data. Radial deviation was significantly worse in patients with PA (N = 49, mean 14°, SD 6° versus N = 55, mean 17°, SD 6°, p = 0.037). No analysis could be performed regarding patient reported outcome measures, because of limited data. Articular incongruence was a significant predictor for PA.

CONCLUSIONS

A high prevalence of PA was found in non-osteoporotic patients following a distal radius fracture. PA following a distal radial fracture was associated with a limited radial deviation and flexion, but not with grip strength. Articular incongruence predicted PA. Patient reported outcome measures should be investigated more thoroughly to be able to understand the value of using these instruments in interpreting outcome in follow-up of non-osteoporotic patients following a distal radius fracture.

LEVEL OF EVIDENCE

Level of evidence 3 (Phillips et al. Levels of Evidence-Oxford Centre for Evidence-based Medicine, 1).

Long-term Systemic Corticosteroid Exposure: A Systematic Literature Review

PURPOSE

While corticosteroids are relatively inexpensive and commonly used as treatment for a variety of conditions, long-term use is known to be associated with certain toxicities. Prior systematic reviews have revealed an increased risk for costly adverse events (AEs), including bone fracture, infection, and gastrointestinal bleeding. The objective of this study was to conduct a systematic literature review of recent publications on the burden of long-term corticosteroid exposure, specifically, to summarize the AEs and economic impact of long-term corticosteroid use and to reveal data gaps for additional research.

METHODS

The Ovid search platform was used to access scientific literature databases. The search strategy targeted the use of corticosteroids and economic outcomes research. Articles were restricted to those published between 2007 and 2016 to cover publications since prior reviews; conference abstracts and articles assessing pediatrics were excluded. Titles and abstracts resulting from inclusion criteria were screened, and reviewers independently extracted relevant information from the relevant full-text articles.

FINDINGS

The literature review included 32 articles, with 75% focusing on autoimmune diseases, asthma, or lung diseases. Included articles were 14 database analyses, 6 simulations, 6 clinical trials, 3 systematic literature reviews, 2 patient surveys, and 1 chart review. Commonly-cited AEs associated with long-term corticosteroid exposure included hypertension (prevalence >30%); bone fracture (21%-30%); cataract (1%-3%); nausea, vomiting, and other gastrointestinal conditions (1%-5%); and metabolic issues (eg, weight gain, hyperglycemia, and type 2 diabetes; cases had 4-fold the risk of controls). Association of dose and duration with increased AE risk is not well-quantified. AEs like peptic ulcer and myocardial infarction are particularly costly to payers (1-year cost of $21,825 and $26,472, respectively, in year-2009 USD). The few articles assessing the economic impact of corticosteroid use have found dose-related increases in health care resource utilization and costs, with per-annum incremental costs relative to nonusers ranging from $5700 in low-dose users (<7.5 mg/d) to $29,000 in high-dose users (>15 mg/d). Adherence to treatment guidelines on avoiding AEs (eg, prescribing of oral bisphosphonates, calcium, and vitamin D) remains low.

IMPLICATIONS

Although doses of long-term corticosteroids have fallen over the past several decades in response to AEs, dose reduction may not be a sufficient solution. Numerous AEs, some very costly, persist among long-term corticosteroid users, suggesting a need for further research to fill current data gaps, as well as a potential need for alternative treatment options.

Risks and Benefits of Bisphosphonate Therapies

Bisphosphonates are the mainstay of osteoporosis treatment but also play a fundamental role in treating other bone diseases such as Osteogenesis Imperfecta, Pagets' disease, and in the prevention of adverse skeletal effects in certain cancers such as prostate cancer or multiple myeloma. In the last decades, the refinement of bisphosphonates and an increase in the number of new bisphosphonates commercialized has altered the clinical management of these diseases. Despite differences between randomized controlled trials and observational studies, overall all bisphosphonates licensed have proven to reduce the risk of fracture through the inhibition of bone resorption. Other beneficial effects include pain reduction in bone metastasis and potentially a decrease in mortality. However, the chronic nature of most of these disorders implies long-term treatments, which can be associated with long-term adverse effects. Some of the adverse effects identified include an increased risk of atypical femur fractures, osteonecrosis of the jaw, gastrointestinal side effects, or atrial fibrillation. The harm/benefit thinking and the constant update regarding these medications are vital in the day-to-day decision-making in clinical practices. The aims of this review are to compile the basic characteristics of these drugs and outline the most important benefits and side effects and provide a clinical context as well as a research agenda to fill the gaps in our knowledge.

Physical exercise and osteoporosis: effects of different types of exercises on bone and physical function of postmenopausal women

Physical exercise is an important stimulus for osteoporosis prevention and treatment. However, it is not clear yet which modality would be better to stimulate bone metabolism and enhance physical function of postmenopausal women. This review paper aims to summarize and update present knowledge on the effects of different kinds of aquatic and ground physical exercises on bone metabolism and physical function of postmenopausal women. Moderate to intense exercises, performed in a high speed during short intervals of time, in water or on the ground, can be part of a program to prevent and treat postmenopausal osteoporosis. Mechanical vibration has proven to be beneficial for bone microarchitecture, improving bone density and bone strength, as well as increasing physical function. Although impact exercises are recognized as beneficial for the stimulation of bone tissue, other variables such as muscle strength, type of muscle contraction, duration and intensity of exercises are also determinants to induce changes in bone metabolism of postmenopausal women. Not only osteoanabolic exercises should be recommended; activities aimed to develop muscle strength and body balance and improve the proprioception should be encouraged to prevent falls and fractures.

Characteristics of lumbar scoliosis in patients with rheumatoid arthritis

Background

Although a substantial percentage of patients with rheumatoid arthritis (RA) experience low back pain, the characteristics of lumbar spine pathology in RA patients has been poorly investigated. In our institutions, lumbar spine radiographs indicated scoliosis in 26 patients. The present study aimed to clarify the characteristics of lumbar scoliosis in RA patients.

Methods

This is a retrospective study of 26 RA patients with lumbar scoliosis. Patient characteristics such as disease duration, disease stage and class according to Steinbrocker's classification, and medication for RA and osteoporosis were reviewed. Radiologic evaluation of scoliosis was performed at two different time points by measuring Cobb angles. The progression of scoliosis per year was calculated by dividing the change in Cobb angles by the number of years. Apical vertebral rotation, lateral listhesis, and the level of the intercrestal line at the first observation were also measured. The correlation between different factors and changes in the Cobb angles per year was analyzed.

Results

Majority of the patients had a long disease duration and were classified as stage 3 or 4 according to Steinbrocker's classification. During the observation period, most patients were treated with glucocorticoids. Unlike the previous studies on degenerative scoliosis, apical vertebral rotation, lateral listhesis, and the level of the intercrestal line at initial observation were not significantly related to the progression of scoliosis. Initial Cobb angles were inversely related to the progression of scoliosis. Patients who were treated with bisphosphonates showed slower progression of scoliosis.

Conclusions

Our results indicate that the characteristics of lumbar scoliosis in RA patients differ from those of degenerative lumbar scoliosis. Bone fragility due to the long disease duration, poor control of disease activity, and osteoporosis is possibly related to its progression.

Glucocorticoid-induced osteoporosis: an update on current pharmacotherapy and future directions

INTRODUCTION

Glucocorticoid-induced osteoporosis (GIOP) is one of the most devastating side-effects of glucocorticoid (GC) use, as it is associated with an increased fracture risk. The importance of GIOP as a health problem is underlined by the frequent use of GC treatment in patients with various chronic diseases and by the high rates of osteoporosis found in these patient groups.

AREAS COVERED

Recent studies on bone metabolism and the influence of GCs have contributed to a better understanding of the pathogenesis of GIOP. Furthermore, new intervention trials have reported beneficial effects of antiresorptive and anabolic agents on GIOP. This article reviews the epidemiology and pathophysiology of osteoporosis and fractures in GC-treated patients and discusses current pharmacotherapy and possible future treatment options.

EXPERT OPINION

Several guidelines for the management of GIOP have been published, using different criteria for bone mineral density (BMD) thresholds and for GC dosages above which anti-osteoporotic therapy should be started. Although alendronate and risedronate are currently first choice, the anabolic agent teriparatide seems to be superior and might be considered as a potential first-line therapy for patients with low BMD on long-term GC treatment. Adherence to anti-osteoporotic drugs is limited, particularly in GIOP patients, due to several factors.

A framework for the development of guidelines for the management of glucocorticoid-induced osteoporosis

This paper provides a framework for the development of national guidelines for the management of glucocorticoid-induced osteoporosis in men and women aged 18 years and over in whom oral glucocorticoid therapy is considered for 3 months or longer.

INTRODUCTION

The need for updated guidelines for Europe and other parts of the world was recognised by the International Osteoporosis Foundation and the European Calcified Tissue Society, which set up a joint Guideline Working Group at the end of 2010.

METHODS AND RESULTS

The epidemiology of GIO is reviewed. Assessment of risk used a fracture probability-based approach, and intervention thresholds were based on 10-year probabilities using FRAX. The efficacy of intervention was assessed by a systematic review.

CONCLUSIONS

Guidance for glucocorticoid-induced osteoporosis is updated in the light of new treatments and methods of assessment. National guidelines derived from this resource need to be tailored within the national healthcare framework of each country.

Treatment of glucocorticoid-induced osteoporsis

Glucocorticoid-induced osteoporosis (GIO) is the most common form of secondary osteoporosis. Fractures occur in 30-50% of patients with GIO. Therefore, treatment of this disease is critical. Although patients should receive supplemental calcium and vitamin D, additional measures are necessary to prevent fractures. Estrogens and androgens may be of value in patients with hypogonadism, but bisphosphonates and teriparatide are the most effective agents in the treatment of GIO. Bisphosphonates prevent the early bone loss that follows exposure to glucocorticoids, and which has been attributed to increased resorption. Teriparatide appears to be more effective than alendronate in established GIO when reduced bone formation is the predominant pathophysiological mechanism. In conclusion, GIO can be prevented and treated with appropriate medical intervention.

Determining the Incidence of Adult Fractures: How Accurate Are Emergency Department Data?

Various research methods have been used to obtain skeletal fracture data and report the incidence of fractures. A large number of British studies have used data collected in emergency departments, and not data derived from orthopaedic units. We hypothesised that fracture data will differ depending upon the methodology employed to capture it. Two commonly used sources of fracture data at our institution were compared, (the Emergency Department (ED) database and the Orthopaedic Trauma Unit (OTU) database), using a cohort of adult patients from our defined population as the study sample. We performed univariate analyses to identify differences between groups with accurate and inaccurate ED fracture diagnoses. We then performed a binary logistic regression analysis to determine the best predictors of diagnostic accuracy. In one year, 7,449 patients were referred to the OTU. Three-quarters were referred with fractures. The overall false positive fracture referral rate was 25%. Several fracture subtypes were commonly overdiagnosed in the ED. Regression analysis showed that patient age, patient gender, and the seniority of the referring clinician were independently predictive of an accurate fracture diagnosis. We suggest that studies making use of ED fracture data may potentially overestimate the incidence of adult fractures.

Cost-effectiveness of different strategies for selecting and treating individuals at increased risk of osteoporosis or osteopenia: a systematic review

OBJECTIVES

To compare cost-effectiveness modeling analyses of strategies to prevent osteoporotic and osteopenic fractures either based on fixed thresholds using bone mineral density or based on variable thresholds including bone mineral density and clinical risk factors.

METHODS

A systematic review was performed by using the MEDLINE database and reference lists from previous reviews. On the basis of predefined inclusion/exclusion criteria, we identified relevant studies published since January 2006. Articles included for the review were assessed for their methodological quality and results.

RESULTS

The literature search resulted in 24 analyses, 14 of them using a fixed-threshold approach and 10 using a variable-threshold approach. On average, 70% of the criteria for methodological quality were fulfilled, but almost half of the analyses did not include medication adherence in the base case. The results of variable-threshold strategies were more homogeneous and showed more favorable incremental cost-effectiveness ratios compared with those based on a fixed threshold with bone mineral density. For analyses with fixed thresholds, incremental cost-effectiveness ratios varied from €80,000 per quality-adjusted life-year in women aged 55 years to cost saving in women aged 80 years. For analyses with variable thresholds, the range was €47,000 to cost savings.

CONCLUSIONS

Risk assessment using variable thresholds appears to be more cost-effective than selecting high-risk individuals by fixed thresholds. Although the overall quality of the studies was fairly good, future economic analyses should further improve their methods, particularly in terms of including more fracture types, incorporating medication adherence, and including or discussing unrelated costs during added life-years.

Public health and prevention in Europe: is it cost-effective?

Objectives

In the public debate surrounding public health and prevention, it is sometimes assumed that preventive interventions are by definition cost-effective. This paper aims to explore whether preventive pharmaceutical interventions are more cost-effective than a curative approach to diseases.

Methods

A descriptive study identified European economic evaluations in the Tufts Medical Center Cost-Effectiveness Analysis Registry between 2000 and 2007. Data were extracted on publication year, target population, intervention, patient sample, disease, prevention stage and incremental cost-utility ratio of each economic evaluation. Preventive interventions were defined as measures preventing disease onset. Curative interventions related to measures identifying patients with risk factors or preclinical disease or interventions limiting disability after harm has occurred. Results were expressed in terms of costs (valued in Euros at 2008 prices) per quality-adjusted life year. The association between incremental cost-utility ratios and prevention stage was examined by means of the Mann–Whitney U test.

Key findings

The analysis included 231 studies that reported information about 608 incremental cost-effectiveness ratios. Preventive interventions included interventions that were more effective and less expensive than comparators (41% of incremental cost-effectiveness ratios), and interventions that improved outcomes and increased costs (59%). Both preventive and curative interventions covered the full range of cost-effectiveness results. However, preventive interventions had a significantly lower median ratio of €6255 per quality-adjusted life year and were thus more cost-effective than curative interventions (€12 917 per quality-adjusted life year) (P=0.002).

Conclusions

Although the cost-effectiveness of preventive interventions varies substantially, preventive interventions tended to be more cost-effective than curative interventions.

Cost-effectiveness of multifaceted evidence implementation programs for the prevention of glucocorticoid-induced osteoporosis

SUMMARY

Using a computer simulation model, we determined that an intervention aimed at improving the management of glucocorticoid-induced osteoporosis is likely to be cost-effective to third-party health insurers only if it focuses on individuals with very high fracture risk and the proportion of prescriptions for generic bisphosphonates increases substantially.

INTRODUCTION

The purpose of this study is to determine whether an evidence implementation program (intervention) focused on increasing appropriate management of glucocorticoid-induced osteoporosis (GIOP) might be cost-effective compared with current practice (no intervention) from the perspective of a third-party health insurer.

METHODS

We developed a Markov microsimulation model to determine the cost-effectiveness of the intervention. The hypothetical patient cohort was of current chronic glucocorticoid users 50-65 years old and 70% female. Model parameters were derived from published literature, and sensitivity analyses were performed.

RESULTS

The intervention resulted in incremental cost-effectiveness ratios (ICERs) of $298,000 per quality adjusted life year (QALY) and $206,000 per hip fracture averted. If the cohort's baseline risk of fracture was increased by 50% (10-year cumulative incidence of hip fracture of 14%), the ICERs improved significantly: $105,000 per QALY and $137,000 per hip fracture averted. The ICERs improved significantly if the proportion of prescriptions for generic bisphosphonates was increased to 75%, with $113,000 per QALY and $77,900 per hip fracture averted.

CONCLUSIONS

Evidence implementation programs for the management of GIOP are likely to be cost-effective to third-party health insurers only if they are targeted at individuals with a very high risk of fracture and the proportion of prescriptions for less expensive generic bisphosphonates increases substantially.

Efficacy and safety of zoledronic acid in the treatment of glucocorticoid-induced osteoporosis

Glucocorticoids are essential in treating many disorders and they are widely used in spite of their negative impact on the skeletal system. As bisphosphonates reduce bone resorption through their action on osteoclasts, they play an important role in management of glucocorticoid-induced osteoporosis. Unlike other bisphosphonates, zoledronic acid is given by intravenous infusion and it has a potential advantage of increasing the compliance and adherence of patients when it is given 5 mg once a year. However, this treatment modality seems to be associated with more adverse events than oral administrations, and further studies with longer follow-up periods must be conducted to determine the safety and cost-effectiveness of long-term treatment with zoledronic acid.

[Current diagnosis and therapy of osteoporosis on the basis of "European guidance 2008"]

Osteoporosis is one of the 10 most important and widespread global diseases. In Germany alone the cost of osteoporosis runs into many billions of Euros. However, it should be noted that in the past 15 years great progress has been made both in diagnosis and in the development of new medications, and this has changed the general perception of and attitude to osteoporosis. It is now taken very seriously and recognised as a national and global disorder which is both preventable and treatable. In spite of this progress, in Europe and especially in Germany, osteoporosis remains an underdiagnosed and undertreated disease. In Germany, only about 10%-15% of patients with manifest osteoporosis are properly treated. However, in addition to national guidelines, there is now a new edition of the "European Position Paper for the Diagnosis and Management of Osteoporosis". This provides physicians treating osteoporosis patients with additional information and therefore more confidence.

Cost-effectiveness of hormone replacement therapy for menopausal symptoms in the UK

OBJECTIVE

To estimate the cost-effectiveness of five-year treatment of hormone replacement therapy (HRT) compared with no treatment for women with menopausal symptoms in the UK.

METHOD

A Markov cohort simulation model with tunnel techniques was used to assess the cost-effectiveness of HRT in women aged 50 years. For the clinical effects of HRT we used, where possible, results taken from the Women's Health Initiative (WHI). The model had a life-time horizon with cycle lengths of one year and contained the following disease states: hip fracture, vertebral fracture, wrist fracture, breast cancer, colorectal cancer, coronary heart disease, stroke and venous thromboembolic events. An intervention was modelled by its impact on the disease risks during and after stopping treatment. The model was populated with UK-specific data on risks, mortality rates, quality-of-life weights and costs. The main outcome of the model was cost per quality-adjusted life year (QALY) gained of HRT compared with no treatment.

RESULTS

The results indicated that it was cost-effective to treat women with menopausal symptoms with HRT in the UK. The severity of menopausal symptoms was the single most important determinant of cost-effectiveness, but HRT remained cost-effective even where symptoms were mild or effects on symptom relief were small.

CONCLUSIONS

Treatment of women with menopausal symptoms with HRT is cost-effective.

Bisphosphonates: mechanism of action and role in clinical practice

Bisphosphonates are primary agents in the current pharmacological arsenal against osteoclast-mediated bone loss due to osteoporosis, Paget disease of bone, malignancies metastatic to bone, multiple myeloma, and hypercalcemia of malignancy. In addition to currently approved uses, bisphosphonates are commonly prescribed for prevention and treatment of a variety of other skeletal conditions, such as low bone density and osteogenesis imperfecta. However, the recent recognition that bisphosphonate use is associated with pathologic conditions including osteonecrosis of the jaw has sharpened the level of scrutiny of the current widespread use of bisphosphonate therapy. Using the key words bisphosphonate and clinical practice in a PubMed literature search from January 1, 1998, to May 1, 2008, we review current understanding of the mechanisms by which bisphosphonates exert their effects on osteoclasts, discuss the role of bisphosphonates in clinical practice, and highlight some areas of concern associated with bisphosphonate use.

European guidance for the diagnosis and management of osteoporosis in postmenopausal women

Guidance is provided in a European setting on the assessment and treatment of postmenopausal women with or at risk from osteoporosis.

INTRODUCTION

The European Foundation for Osteoporosis and Bone disease (subsequently the International Osteoporosis Foundation) published guidelines for the diagnosis and management of osteoporosis in 1997. This manuscript updates these in a European setting.

METHODS

The following areas are reviewed: the role of bone mineral density measurement for the diagnosis of osteoporosis and assessment of fracture risk; general and pharmacological management of osteoporosis; monitoring of treatment; assessment of fracture risk; case finding strategies; investigation of patients; health economics of treatment.

RESULTS AND CONCLUSIONS

A platform is provided on which specific guidelines can be developed for national use.

Glucocorticoid-Induced osteoporosis: clinical and therapeutic aspects

Glucocorticoid-induced osteoporosis (GIO) is the most common form of secondary osteoporosis. Fractures, which are often asymptomatic, may occur in as many as 30_50% of patients receiving chronic glucocorticoid therapy. Vertebral fractures occur early after exposure to glucocorticoids, at a time when bone mineral density (BMD) declines rapidly. Fractures tend to occur at higher BMD levels than in women with postmenopausal osteoporosis. Glucocorticoids have direct and indirect effects on the skeleton. They impair the replication, differentiation, and function of osteoblasts and induce the apoptosis of mature osteoblasts and osteocytes. These effects lead to a suppression of bone formation, a central feature in the pathogenesis of GIO. Glucocorticoids also favor osteoclastogenesis and as a consequence increase bone resorption. Bisphosphonates are the most effective of the various therapies that have been assessed for the management of GIO. Anabolic therapeutic strategies are under investigation. Teriparatide seems to be also efficacious for the treatment of patients with GIO.

The pathogenesis, epidemiology and management of glucocorticoid-induced osteoporosis

Oral glucocorticoids (GCs) are frequently used in the treatment of inflammatory conditions, such as rheumatoid arthritis or asthma. They have adverse skeletal effects, primarily through reductions in bone formation and osteocyte apoptosis. Several findings indicate that changes in the quality of bone may significantly contribute to the increased risk of fracture and that loss of BMD only partially explains the increased risk of fracture in oral GC users. Epidemiological studies have found that the increases in the risk of fracture in oral GC users are dose dependent and occur within three months of starting GC therapy. Daily doses of >2.5 mg prednisone equivalent have been associated with increases in the risk of fractures and randomised studies reported adverse skeletal effects with daily doses as low as 5 mg. After discontinuation of GC treatment, the risk of fracture may reduce towards baseline levels unless patients previously used high cumulative doses of oral GCs. Users of inhaled GCs have also an increased risk of fracture, especially at higher doses. But it is likely that this excess risk is related to the severity of the underlying respiratory disease, rather than to the inhaled GC therapy. It has been recommended that patients who start on oral GC therapy should receive calcium and vitamin D supplementation. Patients with a higher risk of fracture should also receive a bisphosphonate.