Abstract
Objectives
This study aimed to assess the prevalence, the change, and the determinants of change in polypharmacy in a population-based sample.
Methods
Baseline (2003–2006) and follow-up (2009–2012) data are from 4679 participants aged between 35 and 75 years (53.5% women, mean age 52.6 ± 10.6 years) from the population of Lausanne, Switzerland. Polypharmacy was defined by the regular use of ≥5 drugs. Four categories of change were defined: never (no polypharmacy at baseline and follow-up), initiating (no polypharmacy at baseline but at follow-up), maintaining, or quitting.
Results
Polypharmacy increased from 7.7% at baseline to 15.3% at follow-up. Cardiovascular drugs were the most prescribed medicines at baseline and follow-up. Gender, age, obesity, smoking, previously diagnosed hypertension, or diabetes or dyslipidemia were significantly and independently associated with initiating and maintaining polypharmacy.
Conclusion
In a population-based sample, prevalence of polypharmacy doubled over a 5.6-year period. The main determinants of initiating polypharmacy were age, overweight and obesity, smoking status, and previously diagnosed cardiovascular risk factors.
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NA wrote most of the manuscript. PMV collected data, made the statistical analysis, and reviewed the manuscript for important intellectual content. JC designed the study and reviewed the manuscript for important intellectual content. PV and GW revised the manuscript for important intellectual content. PMV had full access to the data and is the guarantor of the study. All authors have read and approved the final version of the manuscript.
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Funding
The CoLaus study was and is supported by research grants from GlaxoSmithKline, the Faculty of Biology and Medicine of Lausanne, and the Swiss National Science Foundation (grants 33CSCO-122661, 33CS30-139468, and 33CS30-148401). Nazanin Abolhassani is supported by an excellence scholarship from the Swiss Federal Government (Reference No. 2016.1098). The funding sources had no contribution to the study design, analysis, and interpretation, as well as writing the report and decision to submit the article for publication.
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Abolhassani, N., Castioni, J., Marques-Vidal, P. et al. Determinants of change in polypharmacy status in Switzerland: the population-based CoLaus study. Eur J Clin Pharmacol 73, 1187–1194 (2017). https://doi.org/10.1007/s00228-017-2288-1
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DOI: https://doi.org/10.1007/s00228-017-2288-1