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  Number Needed to Treat (NNT) from Odds Ratio (OR) and Patient Expected Event Rate (PEER)

 
Input
 
PEER  
OR  

 
Result
 
 
NNT  
 
Decimal Precision  

 
     
 
Include literature references: Yes   No
 

 
Equations used
 
NNT = (1 - (PEER * (1 - OR))) / (PEER * (1 - PEER) * (1 - OR))

 

 
References
  1. ACP Journal Club. Definitions relating to data presentation in Theraputics. Ann Int Med. 2019; 171:JC24.
  2. Fletcher RH, Fletcher SW, Fletcher GS. Clinical Epidemiology The Essentials. 5th edition, Lippincott William & Wilkins Baltimore, 2013. NLMN ID: 101585375 NCBI Logo

 
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