Left-handedness increases injury risk in adolescent girls.

In a self-report survey of a representative national sample of 4081 Scottish schoolchildren, injuries requiring medical assistance were more common in left-handers; these were also more severe and likely to involve an overnight stay in hospital. Particularly at risk were adolescent girls with a 32% greater chance of being injured if they were left-handed compared with their right-handed peers. The corresponding relative risk for boys was not significant.