[Osteoporosis diagnosis and therapy according to the 2010 guidelines]

Worldwide Fracture Prediction

The substantial increase in the burden of non-communicable diseases in general and osteoporosis in particular, necessitates the establishment of efficient and targeted diagnosis and treatment strategies. This chapter reviews and compares different tools for osteoporosis screening and diagnosis; it also provides an overview of different treatment guidelines adopted by countries worldwide. While access to dual-energy X-ray absorptiometry to measure bone mineral density (BMD) is limited in most areas in the world, the introduction of risk calculators that combine risk factors, with or without BMD, have resulted in a paradigm shift in osteoporosis screening and management. To-date, forty eight risk assessment tools that allow risk stratification of patients are available, however only few are externally validated and tested in a population-based setting. These include Osteoporosis Self-Assessment Tool; Osteoporosis Risk Assessment Instrument; Simple Calculated Osteoporosis Risk Estimation; Canadian Association of Radiologists and Osteoporosis Canada calculator; Fracture Risk Assessment Calculator (FRAX); Garvan; and QFracture. These tools vary in the number of risk factors incorporated. We present a detailed analysis of the development, characteristics, validation, performance, advantages and limitations of these tools. The World Health Organization proposes a dual-energy X-ray absorptiometry-BMD T-score ≤ -2.5 as an operational diagnostic threshold for osteoporosis, and many countries have also adopted this cut-off as an intervention threshold in their treatment guidelines. With the introduction of the new fracture assessment calculators, many countries chose to include fracture risk as one of the major criteria to initiate osteoporosis treatment. Of the 52 national guidelines identified in 36 countries, 30 included FRAX derived risk in their intervention threshold and 22 were non-FRAX based.  No universal tool or guideline approach will address the needs of all countries worldwide.  Osteoporosis screening and management guidelines are best tailored according to the needs and resources of individual counties. While few countries have succeeded in generating valuable epidemiological data on osteoporotic fractures, to validate their risk calculators and base their guidelines, many have yet to find the resources to assess variations and secular trends in fractures, the performance of various calculators, and ultimately adopt the most convenient care pathway algorithms.

[Sex-specific differences in drug utilisation in different phases of life]

The aim of the present study is to analyse sex-specific differences in drug utilisation during different phases of life using relevant diseases as examples. We used a cohort of 1.7 million subjects who were insured with the Gmünder ErsatzKasse (GEK), a German health insurance fund, for at least one day in all four quarters of 2009. We analysed subjects with outpatient diagnoses of the following diseases: attention-deficit/hyperactivity disorder (ADHD) (0-17 years), hypothyroidism (18-49 years), osteoporosis (50-79 years) and coronary heart disease (80 + years). Analysis was performed on an active-substance level. A number of differences were observed in drug treatment for the selected diseases (for example, substances for ADHD were prescribed more often in males and for hypothyroidism more often in females), as well as in prescribing practices relating to other drugs used in these groups. However, clear explanations for these differences, such as drug approval status, were not always apparent.

Osteoporosis, frailty and fracture: implications for case finding and therapy

In almost all patients with incident fractures, the absolute risk of subsequent fracture and mortality is highest immediately after the fracture is incurred; the risk is substantially increased in frail elderly patients. The risk factors for incident fractures, such as bone fragility, tendency to fall and the presence of metabolic bone disease, remain underdiagnosed and undertreated. Here, we review the evidence that demonstrates the influence of these risk factors on susceptibility to subsequent fracture and mortality after an incident fracture, and discuss the tools available to predict these outcomes. In this Review, we also propose a systematic, coordinator-based approach to assessment of risk, allocation of treatment and follow-up in all patients over 50 years of age who present with a fracture. The aim of this proposed multistep procedure is to improve the prevention of secondary fracture, decrease mortality rates and reduce patient undertreatment or overtreatment.

A reappraisal of generic bisphosphonates in osteoporosis

The competitive price of generic bisphosphonates has had a marked effect on practice guidelines, but an increasing body of evidence suggests that they have more limited effectiveness than generally assumed.

INTRODUCTION

The purpose of this study is to review the impact of generic bisphosphonates on effectiveness in the treatment of osteoporosis.

METHODS

This study is a literature review.

RESULTS

A substantial body of evidence indicates that many generic formulations of alendronate are more poorly tolerated than the proprietary preparations which results in significantly poorer adherence and thus effectiveness. Poorer effectiveness may result from faster disintegration times of many generics that increase the likelihood of adherence of particulate matter to the oesophageal mucosa. Unfortunately, market authorisation, based on the bioequivalence of generics with a proprietary formulation, does not take into account the potential concerns about safety. The poor adherence of many generic products has implications for guideline development, cost-effectiveness and impact of treatment on the burden of disease.

CONCLUSIONS

The impact of generic bisphosphonates requires formal testing to re-evaluate their role in the management of osteoporosis.