Abstract
Summary
Persistence and compliance to osteoporosis medications aiming to prevent fragility fractures are essential for fracture prevention, but are suboptimal in the population. A Fracture Liaison Service with a systematic follow-up led to ongoing therapy and optimal drug compliance for more than half of treated patients over 2 years.
Purpose
Fracture Liaison Services (FLS) have the potential to improve persistence and compliance to osteoporosis therapy. We aimed to assess patterns of drug use in a high-level intervention FLS.
Methods
Women and men (> 40 years) with a fragility fracture were recruited in a FLS, where osteoporosis therapy was prescribed if appropriate. Based on claims data, patients who filled their prescription in the 3-month period following baseline were selected. The 1- and 2-year persistence rates were measured using survival analysis. In non-persistent subjects, 1-year treatment re-initiation was measured. The 1- and 2-year compliance levels were measured, using the proportion of days covered (PDC > 80% = compliant). Regression analyses were performed to identify predictors of non-persistence/compliance.
Results
Out of 332 subjects with complete drug insurance coverage, 297 (89.5%) were prescribed osteoporosis therapy by the FLS, and 275 (92.6%) were dispensed. Two hundred sixty participants (86.9% female; mean age 65.6 years) were selected for having filled a prescription inside 3 months after baseline. The 1- and 2-year persistence rates were 66.4% and 55.6%, respectively. Treatment re-initiation was observed in 56% of non-persistent patients. PDC was > 80% in 64.2% for 1 year and 62.5% for 2 years. Older and younger age, smoking, higher spine bone mineral density, lower major FRAX risk, and missing follow-up visits were predictors of non-persistence and/or non-compliance.
Conclusions
After 2 years in a high-level intervention FLS, more than half the treated participants were persistent and compliant to treatment. Comparative effectiveness studies must be undertaken to determine whether this intervention is an improvement over usual care.
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Acknowledgments
The authors would like to thank participants, orthopedic clinics’ staff, and research assistants involved in this study. The authors also thank the Régie de l’assurance maladie du Québec for the help with administrative data. A very special thanks to Andreea Banica, BScN, the research clinical nurse for this study, Marc Dorais, MSc, for his help with statistical programming, and Kathleen Beaumont for her assistance in reviewing this manuscript.
Funding
This study was funded by orthopedic funds from the Hôpital du Sacré-Coeur de Montréal research center in Montréal, Canada, grants from Eli Lilly Canada, the Sanofi Canada Chair of drug usage, and the Réseau Québécois de Recherche sur les Médicaments (RQRM). Senay received a doctoral training award from the Fonds de Recherche du Québec - Santé (FRQS).
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Senay and Perreault declare that they have no conflict of interest. Delisle reports support for personal fees from Amgen Canada and Eli Lilly outside of the conducted work. Morin reports research grants from Amgen Canada and Merck outside of the conducted work. Fernandes reports grants from Eli Lilly during the conduct of this study, and grants from Baxter outside of the conducted work.
All procedures performed in this study involving human participants were in accordance with the ethical standards of the CIUSSS Nord de l’Ile de Montréal ethic research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Senay, A., Fernandes, J.C., Delisle, J. et al. Persistence and compliance to osteoporosis therapy in a fracture liaison service: a prospective cohort study. Arch Osteoporos 14, 87 (2019). https://doi.org/10.1007/s11657-019-0633-y
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DOI: https://doi.org/10.1007/s11657-019-0633-y