Number Needed to Treat (NNT) Calculator

An online calculator of the unadjusted, adjusted, and the marginal NNT with the corresponding 95% confidence intervals

For user guidlines and step-by-step tutorial please refer to the following paper

Guidelines to understand and compute the number needed to treat

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UNADJASTED NNT

Calculates the unadjusted Laupacis type NNT (NNT L) or Kraemer & Kupfer's type NNT (KK-NNT) with the corresponding 95% confidence intervals. Please choose the NNT type, the subsequent required fields, and then press Run.

ADJUSTED NNT

Calculates the adjusted and the marginal Laupacis type NNT with the corresponding 95% confidence intervals. Please choose the regression model, the subsequent required fields, and then press Run.

Download results in csv format

Designed and developed by Valentin Vancak
This application is based on the nntcalc R package