Use of age-dependent FRAX-based intervention thresholds for Singapore

John A. Kanis, Manju Chandran, Siok Bee Chionh, Ganga Ganeson, Nicholas C. Harvey, Woon Puay Koh, Timothy Kwok, Tang Ching Lau, Enwu Liu, Mattias Lorentzon, Eugene V. McCloskey, Kelvin Bryan Tan, Liesbeth Vandenput, Helena Johansson

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Abstract

Summary: Assessment and treatment pathways based on age-specific intervention thresholds in Singapore using FRAX paths can be used to identify patients at high risk of fracture and avoid unnecessary treatment in those at low risk.

Purpose: Intervention thresholds for the treatment of osteoporosis have been based historically on the measurement of bone mineral density. The development of FRAX® has permitted a more accurate assessment of fracture risk. The aim of the present study was to explore treatment paths and characteristics of women selected for treatment in Singapore based on FRAX.

Methods: The approach to the setting of intervention and assessment thresholds used the methodology adopted by the National Osteoporosis Guideline Group for FRAX-based guidelines in the UK but based on the epidemiology of fracture and death in Singapore. The methodology was applied to women age 50 years or more drawn from the population-based Singapore Chinese Health Study (SCHS) cohort. Missing data for the calculation of FRAX was simulated using data from Chinese cohorts from Hong Kong.

Results: Intervention thresholds expressed as a 10-year probability of a major osteoporotic fracture ranged from 2.9% at the age of 50 years increasing to 32% at the age of 90 years. A total of 1927 of 29,323 women (7%) had a prior fragility fracture and would be eligible for treatment for this reason. An additional 3019 women (10.3%) would be eligible for treatment on the basis of age-dependent thresholds. The mean BMD T-score of women so selected was −2.94.

Conclusion: Probability-based assessment of fracture risk using age-specific intervention thresholds was developed for Singapore to help guide decisions about treatment.

Original languageEnglish
Article number104
Number of pages10
JournalArchives of Osteoporosis
Volume15
Issue number1
DOIs
Publication statusPublished - Dec 2020
Externally publishedYes

Bibliographical note

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Keywords

  • Fracture risk assessment
  • FRAX
  • Intervention threshold
  • Osteoporosis

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    Kanis, J. A., Chandran, M., Chionh, S. B., Ganeson, G., Harvey, N. C., Koh, W. P., Kwok, T., Lau, T. C., Liu, E., Lorentzon, M., McCloskey, E. V., Tan, K. B., Vandenput, L., & Johansson, H. (2020). Use of age-dependent FRAX-based intervention thresholds for Singapore. Archives of Osteoporosis, 15(1), [104]. https://doi.org/10.1007/s11657-020-00782-9