![Susan Hopkins on Twitter: "Number Needed to Treat (NNT) and Number Needed to Harm (NNH) are key measures to look at (and work out) when you are looking at #RCT #NNT #NNH @ Susan Hopkins on Twitter: "Number Needed to Treat (NNT) and Number Needed to Harm (NNH) are key measures to look at (and work out) when you are looking at #RCT #NNT #NNH @](https://pbs.twimg.com/media/Dr-bETSXQAAoyu0.jpg)
Susan Hopkins on Twitter: "Number Needed to Treat (NNT) and Number Needed to Harm (NNH) are key measures to look at (and work out) when you are looking at #RCT #NNT #NNH @
![GraphPad NNT calculator overview for the example used in this article. | Download Scientific Diagram GraphPad NNT calculator overview for the example used in this article. | Download Scientific Diagram](https://www.researchgate.net/publication/321171904/figure/fig1/AS:562943028887552@1511227485931/GraphPad-NNT-calculator-overview-for-the-example-used-in-this-article.png)
GraphPad NNT calculator overview for the example used in this article. | Download Scientific Diagram
![1 Absolute Risk Reduction, Number Needed to Treat, Back-of-the-Envelope Cost Effectiveness Analysis, Treatment Thresholds Revisited 1 November 2012 Michael. - ppt download 1 Absolute Risk Reduction, Number Needed to Treat, Back-of-the-Envelope Cost Effectiveness Analysis, Treatment Thresholds Revisited 1 November 2012 Michael. - ppt download](https://images.slideplayer.com/26/8801398/slides/slide_3.jpg)