ARI

(redirected from Ari (disambiguation))
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ARI

 Acute respiratory infection, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

absolute risk increase

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ARI

A measure of the negative effect of an intervention or treatment in a clinical trial. It consists of the number of adverse events found in the experimental group, minus the number of adverse events in the control group. It is the opposite of the “absolute benefit increase.”
Medical Dictionary, © 2009 Farlex and Partners