Number needed not to treat
Doctors are aware of the NNT (number needed to treat), the number of patients who need to be treated for one to benefit from the intervention. (Remember that the NNT may be for many years of treatment, and when given per year the number may be far less impressive.) Fewer doctors are familiar with a more important concept, the NNNT the number needed not to treat). The best example of an NNNT is the use of antibiotics for sore throat.