AWWTM: Headline figures

In rare events like bicyclist injuries, odds ratios can be used as an approximation of relative risk: that is, how much a medical intervention changes the risk of a specific outcome.  An odds ratio of 0.3 is interpreted as a 70% reduction in risk of head injury when wearing a bicycle helmet.

Continue reading at At War War With The Motorist for a discussion of relative versus absolute risk, and how dangerous cycling really is.

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