Romosozumab in osteoporosis: Considerable added benefit for women after menopause

June 15, 2020

Romosozumab is a bone-forming monoclonal antibody used in women after menopause for the treatment of severe osteoporosis if there is a high risk of bone fractures. Having been granted approval for this therapeutic indication by the European Medicines Agency in December 2019, it has been available on the German market since March 2020.

The German Institute for Quality and Efficiency in Health Care (IQWiG) now examined in an early benefit assessment whether romosozumab offers an added benefit for the affected women in comparison with the appropriate comparator therapy. The result: Overall, there are only positive effects from treatment with romosozumab followed by treatment with alendronic acid in comparison with the appropriate comparator therapy (here: treatment with alendronic acid alone). In particular, administration of romosozumab reduces both the risk of vertebral fractures and the risk of other typical fractures.

In summary, IQWiG sees an indication of considerable added benefit for postmenopausal women with advanced osteoporosis at high risk of fracture if they are treated with romosozumab (followed by alendronic acid).

More than 540 000 women affected

Osteoporosis is a common age-related bone disease. As the bone becomes thinner and more porous, the risk of fracture is increased. Besides fractures of the spine ("vertebral fractures"), the most typical sites of fracture are the hip, the pelvis, the upper arm and the forearm ("non-vertebral fractures"). About 80 per cent of all cases of osteoporosis affect women after menopause. In Germany, more than 540 000 of these women have severe, i.e. advanced osteoporosis at high risk of fracture. The number of affected women in the statutory health insurance is about 475 000.

Randomized controlled trial of two years with over 4000 participants

The IQWiG assessment of the added benefit of romosozumab was based on the ARCH study submitted by the drug manufacturer. 4093 postmenopausal women with severe osteoporosis at high risk of fracture participated in this randomized controlled trial (RCT). Half of the women were treated with romosozumab for 12 months, whereas the other half received alendronic acid. Participants in both study arms then received alendronic acid for at least another 12 months. Primary outcomes of the ARCH study were the occurrence of new vertebral fractures and new clinical fractures.

Overall indication of considerable added benefit

The ARCH study showed a statistically significant difference between the treatment arms for the patient-relevant outcome "clinical vertebral fracture": 0.9 of the patients initially treated with romosozumab had vertebral fractures, whereas this number was 2.1% in patients only treated with alendronic acid. This resulted in an indication of a considerable added benefit for this outcome.

For the outcome "major non-vertebral fracture" (e.g. fractures of the hip, the pelvis, the upper arm or the forearm), the ARCH study also showed an advantage of romosozumab in comparison with alendronic acid: These fractures occurred in 7.1% of the patients in the romosozumab group, and in 9.6% of the patients in the comparator group. The IQWiG project team derived an indication of a minor added benefit from this.

In summary, IQWiG sees an indication of considerable added benefit for postmenopausal women with severe osteoporosis at high risk of fracture if they are treated with romosozumab (followed by alendronic acid).

G BA decides on the extent of added benefit

This dossier assessment is part of the early benefit assessment according to the Act on the Reform of the Market for Medicinal Products (AMNOG) supervised by the Federal Joint Committee (G-BA). After publication of the dossier assessment, the G-BA conducts a commenting procedure and makes a decision on the extent of the added benefit.

More English-language information will be available soon (Sections 2.1 to 2.5 of the dossier assessment as well as easily understandable information on informedhealth.org). If you would like to be informed when these documents are available, please send an e-mail to info@iqwig.de.
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Institute for Quality and Efficiency in Health Care

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