Protection afforded by cycle helmets

doi:10.1136/bmj.309.6966.1441a

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Richard Keatinge,
Ruth Parry

Consultant in public health medicine, Trainee in public health medicine, Gwynedd Health Authority, Bangor, Gwynedd LL57 4TP.

EDITOR,—Frank McDermott and John Lane defy engineering evidence in stating that cycle helmets reduce the risk of serious head injury in accidents involving motor vehicles.1 Their study, however, looked only at people who had contacted health services after being injured and included no facts on the relative risk of injury with and without a helmet. Their data do not form a valid basis for their assertion.2 They fail to mention the …