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Osteoporosis International
Published in: Osteoporosis International 6/2011

01-06-2011 | Original Article

Adherence, preference, and satisfaction of postmenopausal women taking denosumab or alendronate

Authors: D. L. Kendler, M. R. McClung, N. Freemantle, M. Lillestol, A. H. Moffett, J. Borenstein, S. Satram-Hoang, Y.-C. Yang, P. Kaur, D. Macarios, S. Siddhanti, on behalf of the DAPS Investigators

Published in: Osteoporosis International | Issue 6/2011

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Abstract

Summary

In this study, 250 women with osteoporosis were randomized to 12 months with subcutaneous denosumab 60 mg every 6 months or oral alendronate 70 mg once weekly, then crossed over to the other treatment. The primary endpoint, treatment adherence at 12 months, was 76.6% for alendronate and 87.3% for denosumab.

Introduction

The purpose of this study is to evaluate treatment adherence with subcutaneous denosumab 60 mg every 6 months or oral alendronate 70 mg once weekly.

Methods

In this multicenter, randomized, open-label, 2-year, crossover study, 250 postmenopausal women with low bone mineral density received denosumab or alendronate for 12 months, then the other treatment for 12 months. The alendronate bottle had a medication event monitoring system cap to monitor administration dates. Definitions were as follows: compliance, receiving both denosumab doses 6 (±1) months apart or 80–100% of alendronate doses; persistence, receiving both denosumab doses and completing the month 12 visit within the visit window or ≥2 alendronate doses in the final month; adherence, achieving both compliance and persistence. This report includes data from the first 12 months.

Results

The primary study endpoint, adherence in the first 12 months, was 76.6% (95/124) for alendronate and 87.3% (110/126) for denosumab. Risk ratios for denosumab compared with alendronate at 12 months were 0.58 (p = 0.043) for non-adherence, 0.48 (p = 0.014) for non-compliance, and 0.54 (p = 0.049) for non-persistence. Subject ratings for treatment necessity, preference, and satisfaction were significantly greater for denosumab and ratings for treatment bother were significantly greater for alendronate. Adverse events were reported by 64.1% of alendronate-treated subjects and 72.0% of denosumab-treated subjects (p = 0.403). The most common adverse events were arthralgia, back pain, pain in extremity, cough, and headache (each in <10% of subjects in each group).

Conclusions

Significantly greater treatment adherence was observed for subcutaneous administration of denosumab every 6 months than for oral alendronate once weekly.
Appendix
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Metadata
Title
Adherence, preference, and satisfaction of postmenopausal women taking denosumab or alendronate
Authors
D. L. Kendler
M. R. McClung
N. Freemantle
M. Lillestol
A. H. Moffett
J. Borenstein
S. Satram-Hoang
Y.-C. Yang
P. Kaur
D. Macarios
S. Siddhanti
on behalf of the DAPS Investigators
Publication date
01-06-2011
Publisher
Springer-Verlag
Published in
Osteoporosis International / Issue 6/2011
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI
https://doi.org/10.1007/s00198-010-1378-z

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