Chief, Division of Endocrinology, Taipei City Hospital Renai Branch.
MD, National Taiwan University.
Clinical interests: thyroid and endocrine disorders, diabetes, obesity, and bone diseases in thalassemia major.
21 MARCH
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Session |
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08:30
10:00
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Osteoporosis and Bone Health
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Daisuke InoueJapan
Speaker
New Concept in Osteoporosis Management- Japnaese Perspectives Operational definition of osteoporosis by WHO is currently "a BMD value -2.5SD or more below the young adult mean", which has been used worldwide for twenty years. WHO has recently initiated a process to revisit this definition as it is not sensitive enough to identify individuals at high risk of fracture, leading to unsatisfactory treatment of patients. Importantly, a history of fracture, particularly within the past two years (termed imminent fracture risk) has been shown to significantly contribute to the risk of subsequent fractures.
Regarding a surrogate for evaluating the clinical efficacy of anti-osteoporotic drugs, a proposal from the FNIH-ASBMR-SABRE project has been submitted to the Food and Drug Administration (FDA). This proposal suggests that treatment-related increases in total hip BMD (TH-BMD) at two years could serve as a surrogate endpoint for fracture risk reduction in clinical trials. This is primarily based on the negative correlation observed between increases in total hip BMD and decreases in the incidence of hip fracture in various clinical trials of anti-osteoporotic drugs demonstrated by a meta-regression analysis.
The significant role of BMD as a surrogate, along with availability of bone anabolic agents that can greatly increase BMD for a short period of time, has led to the concept of "Goal-directed treatment" of osteoporosis. Accordingly, "anabolic first" sequential therapy is recommended for individuals at high risk of fractures.
In Japan, new Guidelines for Prevention and Treatment of Osteoporosis were issued on August 1, 2025. Recent trends in osteoporosis management, as described above, will be discussed in the context of these Japanese guidelines.
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201AF
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