I have greatly enjoyed and learned from the NNT discussion that has been
taking place here. It has provoked this question, and I wonder what you all
say.
Over about 7 years, regular mammography reduces breast cancer deaths with a
NNT (NNS?) of about 2,500. Assuming one does mammograms every 2 years (an
average of 3 1/2 mammograms over 7 years), can one say that the chance of
preventing a breast cancer death for a single woman with a single mammogram is
about 1 in 8,750?
I am not sure if this a valid way of extending the NNT.
Thanks to all for considering this.
Cheers and Best Wishes,
Brian
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Brian Budenholzer, MD
Director, Clinical Enhancement & Development
Group Health Northwest
CC18
PO Box 204
Spokane, WA 99210-0204
USA
[log in to unmask]
509/ 838-9100 X 7393
fax: 509/ 458-0368
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