LONDON, Aug. 1 (UPI) -- A new British study says women who smoke while pregnant have a greater risk of having children with behavioral problems.
It is the first time researchers have found an independent link between smoking during pregnancy and anti-social behavior of children, such as destroying belongings, bullying, stealing, telling lies and disobedience, the Scotsman reported Monday.
The study by the Institute of Psychiatry also found a link with attention deficit hyperactivity disorder, or ADHD.
Previous studies have linked antisocial behavior and ADHD with smoking while pregnant, but those studies did not establish if those cases of antisocial behavior were related to smoking or were a consequence of ADHD, which is a known risk factor for anti-social behavior, the newspaper said.
The new study, published in the British Journal of Psychiatry, looked at 723 identical and 1173 non-identical twin pairs born in Britain between 1980 and 1991.