Is it possible to calculate meaningful NNTs from the following data?
If so, I would be very grateful for advice on how to do this, if
preferably using my 2x2 calculator. I know that it is easy to choose the
wrong numbers for denominators and numerators in very simple statistical
calculations!
From a case-control study: Huerta et al. Non-steroidal anti-inflammatory
drugs and risk of first hospital admission for heart failure in the
general population. Heart. 2006 Nov;92(11):1610-5.
Risk of hospitalization for heart failure associated with use of NSAIDs
Cases Controls
Number 1396 5000
Duration of NSAIDs use:
Non-use 487 2014
1-30 days 49 105
31-365 days 54 173
365-730days 28 62
>730 days 65 184
Thanks very much.
Michael
Clinical Knowledge Author, Guideline Developer and Informatician
NHS Clinical Knowledge Summaries Service www.cks.library.nhs.uk
Sowerby Centre for Health Informatics at Newcastle Ltd www.schin.co.uk
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