Absolute Risk Increase
The negative effect of treatment
The absolute risk reduction (ARI) is the absolute difference between the control event rate (CER) and the experimental event rate (EER). The absolute risk increase is essentially the negative impact of a treatment strategy in a given population. Absolute risk increase further informs upon the number needed to harm (NNH) calculation.
Absolute Risk Increase (ARI)
Click on the Number Needed to Harm button to continue.
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