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Benzodiazepine use and risk of dementia: prospective population based study

BMJ 2012; 345 doi: https://doi.org/10.1136/bmj.e6231 (Published 27 September 2012) Cite this as: BMJ 2012;345:e6231

Re: Benzodiazepine use and risk of dementia: prospective population based study

It seems a shame that, in such a well planned and presented study, the 735 potential participants who had a preceding or prevalent history of benzodiazepine use were excluded. Inclusion of this group as a third arm may have allowed for greater powering of the association found - even with the trade-off of greater potential for confouding.

Competing interests: No competing interests

28 September 2012
Judah B Eastwell
GPST2
University Hospital of South Manchester
Wythenshawe, Manchester