Efficacy and safety of denosumab vs. bisphosphonates in postmenopausal women previously treated with oral bisphosphonates

Miller, P. D.; Pannacciulli, N.; Malouf-Sierra, J.; Singer, A.; Czerwiński, E.; Bone, H. G.; Wang, C.; Huang, S.; Chines, A.; Lems, W.; Brown, J. P.

Affiliations

¹Colorado Center for Bone Research, Pine, USA

²Amgen Inc., Thousand Oaks, USA

³Hospital de la Santa Creu i Sant Pau, Barcelona, Spain

⁴Georgetown University Medical Center, Washington, USA

⁵Krakow Medical Center, Krakow, Poland

⁶Michigan Bone and Mineral Clinic, Detroit, USA

⁷VU University Medical Center, Amsterdam, The Netherlands

⁸CHU de Québec Research Centre and Laval University, QC, Canada

Abstract and keywords

Summary: Transitioning postmenopausal women with osteoporosis from a bisphosphonate to denosumab appears to be safe and more effective at improving BMD than continuing treatment with a bisphosphonate.

Introduction: We conducted a patient-level pooled analysis of four studies to estimate the efficacy and safety of transitioning to denosumab vs. continuing bisphosphonate treatment in postmenopausal women who previously received oral bisphosphonates.

Methods: Patients received 60 mg denosumab once every 6 months or a bisphosphonate (oral alendronate, risedronate, ibandronate, or intravenous zoledronic acid). Endpoints were change from baseline in lumbar spine, total hip, femoral neck, and 1/3 radius BMD at month 12, change from baseline in serum CTX-1 and P1NP, and incidence of adverse events.

Results: A total of 2850 randomized patients (1424 bisphosphonate:1426 denosumab) were included in the analysis. Percentage change in BMD was significantly greater (p < 0.001) for denosumab vs. bisphosphonate at each skeletal site; differences in BMD changes ranged from 0.6 to 2.0%. Percentage decrease in serum CTX-1 and P1NP was significantly greater (p < 0.0001) for denosumab vs. bisphosphonate at months 1, 6, and 12; in the denosumab group only, percentage change in serum CTX-1 at month 1 was significantly correlated with percentage change in lumbar spine and total hip BMD at month 12. The incidences of adverse events were similar between treatment groups. Three patients (one bisphosphonate and two denosumab) had atypical femoral fractures, all from the denosumab vs. zoledronic acid study.

Conclusion: Postmenopausal women can safely transition from a bisphosphonate to denosumab, which is more effective at improving BMD than continuing with a bisphosphonate.

Clinical trials registration: NCT00377819, NCT00919711, NCT00936897, NCT01732770.

Keywords: Denosumab; Bisphosphonate; Bone mineral density; Pooled analysis; Postmenopausal women

Links

DOI: 10.1007/s00198-019-05233-x

PubMed: 31776637

WoS: 000498951500001

History

Received: 2019-06-26

Accepted: 2019-11-11

Online: 2019-11-28

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