Passive smoking causes behavioural problems in children

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Children whose mothers smoke during pregnancy — and even those born into smokers’ homes — are nearly twice as likely to develop behavioural problems, researchers said Tuesday.

A study of some 5,200 French primary school children linked exposure to smoking with a range of troubling behaviour such as aggression, disobedience, lying and cheating.

“Exposure to tobacco during pregnancy and after birth practically doubles the risk of behaviour problems among primary school children aged on average around 10 years,” study head Isabella Annesi-Maesano, of France’s leading government health research body INSERM, told AFP.

The culprit could be the toxic effect that nicotine has on developing brains — especially during the first months of life, said the study published last month in American journal PlOS One.

Researchers said the higher risk was demonstrated by the fact that 18 percent of children exposed to smoke before and after birth exhibited behaviour problems, compared with the 9.7 percent who came from non-smoking households.

The results were based on questionnaires filled out by parents which assessed their children’s behaviour and whether they had been exposed to tobacco before their first birthday.

Researchers also reported higher risks of emotional disorders — like becoming easily afraid — in children exposed to nicotine in the womb or in early life.

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