Dear Colleagues,
If anyone is prepared to answer this query I should be grateful if they would respond to Jackie directly.
All good wishes,
Olive
NNT query
From:
"Stark, Jackie" <[log in to unmask]>
Date:
Thu, 16 Nov 2006 11:30:23 -0000
To:
<[log in to unmask]>
To:
<[log in to unmask]>
*Hello,*
*Many years ago I did some courses about EBM which were run by the
centre and was told that if there were any queries I could make
contact. I have a query about a slide that was presented to nurse
prescribers which caused much debate between myself and the presenter.
I wonder if someone at the centre would be willing to confirm whether
the final statement *i.e treat 20 people with *B rather than A and 1
will benefit* is correct?
*My opinion is that, while the calculation of NNT is correct, the
drugs should be transposed in the final statement in order for the
statement to be correct. The full slide read as follows:*
*Medicine A cures 50% of people*
*Medicine B cures 45% of people*
** *ARR = 5%
** *RRR = 10%
*Number needed to treat (NNT):*
** *the number of people you need to give medicine B rather than
medicine A for one to benefit
*NNT=100/ARR(%):*
** *In this case 100/5 = 20.
** *i.e. treat 20 people with B rather than A and 1 will benefit.
*If you are able to help I would be grateful as most of the audience
were completely new to EBM and I feel passionately that they should
have the best start possible. I am always mindful and grateful for the
excellent introduction provided for me by your centre.*
*Best Regards,*
Jackie Stark
Medicines Management Pharmacist
Humber Mental Health Teaching NHS Trust
Trust Headquarters
Willerby Hill
Beverley Road
Willerby
Hull
HU10 6ED
Tel: 01482 389202 (Direct)
Tel: 01482 301724 (Departmental Secretary)
Fax:01482 303927
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