Tuesday, October 01, 2013

Smoking during pregnancy may increase risk of bipolar disorder in offspring

A study published in the American Journal of Psychiatry suggests an association between smoking during pregnancy and increased risk for developing bipolar disorder (BD) in adult children.

The researchers evaluated offspring from a large group of pregnant women who participated in the Child Health and Development Study (CHDS) from 1959-1966. The study was based on 79 cases and 654 comparison subjects. Maternal smoking during pregnancy was associated with a twofold increased risk of BD in their offspring.

Smoking during pregnancy is known to contribute to significant problems in utero and following birth, including low birth weight and attentional difficulties. This is the first study to suggest an association between prenatal tobacco exposure and BD, a serious psychiatric illness. The condition is marked by significant shifts in mood that alternate between periods of depression and mania. Symptoms typically become noticeable in the late teens or early adulthood.

"These findings underscore the value of ongoing public health education on the potentially debilitating, and largely preventable, consequences that smoking may have on children over time," said Alan Brown, MD, MPH, senior author and Professor of Clinical Psychiatry and Epidemiology at the New York State Psychiatric Institute, Columbia University and Mailman School of Public Health.

A previous study by Dr. Brown and colleagues found that flu virus in pregnant mothers was associated with a fourfold increased risk that their child would develop BD.

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