Number Needed To Treat Calculator

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Posted by Dinesh on

The Number Needed to Treat (NNT) is the number of patients you need to treat to prevent one additional bad outcome (death, stroke, etc.). For example, if a drug has an NNT of 5, it means you have to treat 5 people with the drug to prevent one additional bad outcome.

Number Needed To Treat Calculation

Formula:

NNT = (1 ÷ (EER-CER))

Where
NNT is Number needed to treat,
EER is Experimental event rate,
CER is Control event rate
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