MJA
MJA

Prevalence of venous thromboembolism in medical inpatients

J Alasdair Millar, Glenda E Lee and Rinaldo Ienco
Med J Aust 2010; 192 (12): . || doi: 10.5694/j.1326-5377.2010.tb03720.x
Published online: 21 June 2010

To the Editor: The clinical justification for a medical intervention depends on absolute prevalence (p) of a disease or condition in a population and the relative risk reduction (R) that would result from the intervention. These variables determine the “number needed to treat” (NNT) to prevent one occurrence of a disease, according to the formula NNT = [100 ÷ (P × R)], where P and R are expressed as percentages.

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