Osteoporosis, bone & mineral

Denosumab withdrawal increases vertebral fracture and mortality risk compared with zoledronate

Eur J EndocrinolPublished Retrospective cohort study

Main finding · Vertebral fractures (VFs)Result — go to the resultHazard ratio 1.479 95% CI 1.222–1.789

Authors' conclusion

After adjusting for drug discontinuation, Dmab showed an increased risk of VFs within the first 2 years, contributing to an elevated overall mortality risk. Sensitivity analyses revealed consistent results across different regions.

Study context

Population
Osteoporosis patients aged 50 years or older, TriNetX US network10,422 matched
Participants
11,104 vs 15,976
Exposure
DMAB withdrawal vs zoledronate discontinuation
  • Denosumab (Dmab)n = 11,104
  • Zoledronate (ZOL)n = 15,976reference
Outcome
Vertebral fractures (VFs)
Methodological detailspropensity-score matched, TriNetX US network
  • Propensity-score matched
  • TriNetX US network

Main finding

As reported in the abstract

Hazard ratio

1.479

95% CI 1.222–1.789

Dmabvs ZOL
HR 1.479 (95% CI 1.222–1.789)

Observational data: associations, not effects.

Further findings

OutcomeHR (CI)
Thoracic VFs1.309 (1.023–1.674)
Lumbar VFs1.865 (1.425–2.440)
Collapsed VFs1.928 (1.462–2.542)
All-cause mortality1.588 (1.475–1.710)

VF risk by subgroup

Increased VF risk with Dmab vs ZOL in female, aged 50-64, ≥65 years and white patients, regardless of fracture history

Original publication

Denosumab withdrawal increases vertebral fracture and mortality risk compared with zoledronate. Eur J Endocrinol. Published 30 January 2025. doi:10.1093/ejendo/lvaf013

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