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Submitted: 20 Jul 2021
Accepted: 22 Jul 2021
ePublished: 30 Sep 2021
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Int J Basic Sci Med. 2021;6: 74-75.
doi: 10.34172/ijbsm.2021.13
  Abstract View: 334
  PDF Download: 202

Editorial

“P Value” or “Number Needed to Treat”: Which One Is Better for Evaluating Clinical Treatments’ Benefits?

Soudabeh Hamedi-Shahraki 1 ORCID logo, Farshad Amirkhizi 2* ORCID logo

1 Department of Epidemiology and Biostatistics, Faculty of Public Health, Zabol University of Medical Sciences, Zabol, Iran
2 Department of Nutrition, Faculty of Public Health, Zabol University of Medical Sciences, Zabol, Iran
*Corresponding Author: Email: amirkhizi.f@gmail.com

Abstract

Statistical significance does not necessarily mean clinical significance. A P value less than 0.05 does not guarantee the clinical effectiveness of a treatment. To assess the clinical valuable of a treatment, the effect size must be calculated. The number needed to treat (NNT) is an example of an effect size measure that can be very helpful in determining the clinical significance of a treatment. Therefore, it is recommended for all researchers and physicians to look beyond the P value and calculate the NNT for assessing the clinical significance of therapeutic measures and agents.
Keywords: Number Needed to Treat, P-value, effect size, clinical trial
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