No. of Patients Needed To Treat (NNT)

The NNT is typically a treatment with medication. It is calculation the number of patients who need to be treated in order to prevent one additional bad outcome.

Number Needed To Treat Calculator

Number of People in Control Group
Ctrl.Gr. people who develop condition of interest
Number of People in Active Treatment Group
Active Treatment Group people who develop condition of interest
Number of Patients Needed to Treat

The NNT is typically a treatment with medication. It is calculation the number of patients who need to be treated in order to prevent one additional bad outcome.

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Formulas Used:

1 / ((Ctrl.Gr.(w/ Cond) / Ctrl.Gr.(Total)) - (Act.Tx Gr.(w/ Cond) / Act.Tx Gr.(Total)) Ctrl.Gr.(Total) = No. of People in Control Group Ctrl.Gr.(w/ Cond) = No. of People in Control Group who develop condition of interest during time interval Act.Tx Gr.(Total) = No. of People in Active Treatment Group Act.Tx Gr.(w/ Cond) = No. of People in Active Treatment Group who develop condition of interest during time interval

Calculation of Number of Patients Needed To Treat (NNT) is made easier. Free online medical calculators.

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Note :This statistics calculator is presented for your own personal use and is to be used as a guide only. Medical and other decisions should NOT be based on the results of this calculator. Although this calculator has been tested, we cannot guarantee the accuracy of its calculations or results.


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