Research of over 13,000 children in
The study, which is the first of its type, was carried out by the universities of
The study tested 13,159 mothers with children born in
The findings showed mothers using the handsets regularly were 54 per cent more likely to give birth to offspring with behavioural problems, and the chances of these instances increased with exposure to the radiation.
Use of the phone by young children also increased the problem by up to 80 per cent.
The scientists involved in the study were surprised at the results, and were unable to find a direct biological reason for the findings. They added other factors - such as the unavailability of phone-prone mothers - might help explain the findings, so caution should be exercised.
The research is to be published in the July issue of the journal Epidemiology.
Source: The Independent