The number needed to treat (NNT) is a widely used measure of the potential impact of a treatment or intervention, but it is often calculated and discussed in ways which oversimplify critical issues.

Robot-guided radiation therapy can be an effective treatment for age-related macular degeneration (AMD), according to a study published Tuesday in The Lancet. The targeted radiation treatment reduced ...

Am J Health Syst Pharm. 2005;62(19):2031-2036. Another group of researchers used graphic representation to explore the extent to which the NNT appropriately conveys the benefits of interventions aimed ...