Journal of Clinical Epidemiology
Volume 59, Issue 3 , Pages 217-223 , March 2006

Annualized was found better than absolute risk reduction in the calculation of number needed to treat in chronic conditions

,Accepted 18 July 2005.

References 

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PII: S0895-4356(05)00247-7

doi: 10.1016/j.jclinepi.2005.07.006

Journal of Clinical Epidemiology
Volume 59, Issue 3 , Pages 217-223 , March 2006