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Epilepsy: fractures and the role of cumulative antiepileptic drug load.
MedLine Citation:
PMID:  21434876     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Beerhorst K, Schouwenaars FM, Tan IY, Aldenkamp AP. Epilepsy: fractures and the role of cumulative antiepileptic drug load. Acta Neurol Scand: DOI: 10.1111/j.1600-0404.2011.01509.x. © 2011 John Wiley & Sons A/S. Background- An association between antiepileptic drugs (AEDs), low bone mineral density (BMD), fractures, and abnormalities in bone metabolism has been suggested for a longer period, although conclusive evidence has not been reported. We aimed at studying patient characteristics in a high-risk population. Methods - All adult patients from a residential unit of a tertiary epilepsy center who were diagnosed with osteoporosis and consequently treated with a bisphosphonate at that moment were included. Correlations between reported fractures and patient characteristics were explored. Results - Of the total population of 261 adult patients, 54 patients were included resulting in a high prevalence rate of 21% osteoporosis in this population. The number of fractures correlated significantly with ambulatory status (r = -0.269, P = 0.05), drug load (r = 0.286, P = 0.04), and current number of AEDs (r = 0.283, P = 0.04). Correlations could not be provided for individual drugs in our population as only a minority was on monotherapy and even less patients had always been on monotherapy of the same antiepileptic drug. Linear regression analysis showed that cumulative drug load (defined by a surrogate parameter: the total duration of epilepsy multiplied by the number of AEDs) was the dominant factor explaining the occurrence of fractures. Conclusion - In this high-risk population, we obtained a positive and strong correlation between the occurrence of fractures in a diagnosed population with osteoporosis and the cumulative drug load of AEDs. This effect seems general, independent of the type of AEDs that were used.
Authors:
K Beerhorst; F M Schouwenaars; I Y Tan; A P Aldenkamp
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-21
Journal Detail:
Title:  Acta neurologica Scandinavica     Volume:  -     ISSN:  1600-0404     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370336     Medline TA:  Acta Neurol Scand     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2011 John Wiley & Sons A/S.
Affiliation:
Department of Neurology, Maastricht University Medical Center, Maastricht, the Netherlands Research school of Mental Health and Neuroscience, Maastricht, the Netherlands Department of Neurology, Atrium Medical Center Parkstad, Heerlen, the Netherlands Het Rijtven, Stichting ORO, Helmond, the Netherlands Epilepsy Center Kempenhaeghe, Heeze, the Netherlands.
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