An estimate of how many people need to receive an interventionA treatment, procedure or programme of health care that has the potential to change the course of events of a healthcare condition. Examples include a drug, surgery, exercise or counselling. (for example a drug, surgery, or exercise) before one person would experience a harmful outcomeOutcomes are measures of health (for example quality of life, pain, blood sugar levels) that can be used to assess the effectiveness and safety of a treatment or other intervention (for example a drug, surgery, or exercise). In research, the outcomes considered most important are ‘primary outcomes’ and those considered less important are ‘secondary outcomes’. because of the intervention. Ideally this number should be as large as possible.
Number needed to treat to harm by Selena Ryan-Vig
is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International