A team of academics looked at the behaviour of 200 children aged six, who had all been born before 26 weeks. Their behaviour was compared to a control group of children of a similar age. Researchers found 30.6 per cent of the premature children were hyperactive, compared to just under nine per cent in the control group, and one-third of the premature children had attention problems, compared to just under seven per cent in the control group. Boys...