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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.

Related Calculators


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=

 
   
  



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.