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NNT is a common measure of effect size in the biomedical sciences. It is the number of patients that you expect to have to treat in order to cure one patient. Also use this tag for questions about the number needed to harm.

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Deciding Optimal Cutoff for a Prognostic Index derived from Cox Proportional Hazards

I am planning to develop a prognostic model that would identify a particular group of head neck cancer patients who will do better if chemotherapy is added to standard radiation therapy. The data for …