Abstract
Summary
Long-term bone mineral density (BMD) gains, bone marker levels, and safety of 3 mg quarterly intravenous (IV) ibandronate were studied in this 3-year extension to the Dosing IntraVenous Administration (DIVA) trial. Quarterly IV ibandronate consistently increased lumbar spine bone mineral density measured with dual-energy X-ray absorptiometry (DXA-BMD) over 5 years (8.1%) and was well tolerated in women with postmenopausal osteoporosis.
Introduction
Treatment with IV ibandronate regimens, 2 mg bimonthly and 3 mg quarterly, has been studied for up to 5 years in a long-term extension (LTE) to the 2-year DIVA trial.
Methods
DIVA LTE is an open-label extension to a 2-year randomized, double-blind, double-dummy, noninferiority, phase III study (DIVA core). DIVA LTE involved postmenopausal women who had completed 2 years of DIVA core, comparing daily oral and IV ibandronate (≥75% adherence with IV ibandronate in year 2 of DIVA). Patients previously treated with 2 mg bimonthly or 3 mg quarterly IV ibandronate continued on the same regimen; patients who had received 2.5 mg daily oral ibandronate and placebo IV in DIVA core were switched to IV ibandronate.
Results
Pooled analysis of 497 intent-to-treat (ITT) patients receiving IV ibandronate from DIVA core baseline showed consistent increases over 5 years in lumbar spine DXA-BMD (8.4% [95% confidence interval (CI) = 7.5, 9.3] with 2 mg bimonthly and 8.1% [95% CI = 7.2, 8.9] with 3 mg quarterly). Three-year data relative to DIVA LTE baseline in the full ITT population (756 patients randomized or reallocated from DIVA, including those previously on daily treatment) showed maintenance of DXA-BMD gains from DIVA core with further gains in lumbar spine DXA-BMD. These benefits are supported by sustained reductions in markers of bone metabolism. No tolerability concerns or new safety signals were observed.
Conclusions
Treatment with IV ibandronate 2 mg bimonthly or 3 mg quarterly is effective and well tolerated for up to 5 years in women with postmenopausal osteoporosis.
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Acknowledgements
Support for third-party writing assistance for this manuscript was provided by F. Hoffmann-La Roche Ltd.
Conflicts of interest
Dr. Bianchi has received honoraria and/or consulting fees from Abbott, Amgen, Eli Lilly, GlaxoSmithKline, Merck Sharp & Dohme, Novartis, Pfizer, Roche, Schering Plough, and Servier. Dr. Czerwinski has received research grants from Amgen, Eli Lilly, Merck, Novartis, Pfizer, Procter and Gamble, Roche, and Servier. Dr. Recker is a paid consultant for Merck, Lilly, Pfizer, Procter and Gamble, Amgen, Roche, Glaxo Smith Kline, and Novartis and has received grant/research support from Merck, Lilly, Wyeth, Procter and Gamble, Amgen, Roche, Glaxo Smith Kline, Novartis, and Sanofi-Aventis through grants to his institution. Dr. Felsenberg serves as a consultant for Amgen, Chugai, GlaxoSmithKline, Lilly, Merck, Novartis, Roche, and Servier. Dr. Burdeska and Dr. Kenwright are employees of F. Hoffmann-La Roche; Dr Kenwright has some shares in this company.
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The DIVA study LTE was funded by F. Hoffmann-La Roche and GlaxoSmithKline.
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Bianchi, G., Czerwinski, E., Kenwright, A. et al. Long-term administration of quarterly IV ibandronate is effective and well tolerated in postmenopausal osteoporosis: 5-year data from the DIVA study long-term extension. Osteoporos Int 23, 1769–1778 (2012). https://doi.org/10.1007/s00198-011-1793-9
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DOI: https://doi.org/10.1007/s00198-011-1793-9