Stressed parents may play a role in childhood asthma, researchers believe.
They found the children of tense parents who lived in polluted areas were far more likely to have asthma than friends in the same neighbourhood.
The University of California team believe parental anxieties combine with other known risk factors to increase a child's asthma risk.
They told Proceedings of the National Academy of Sciences there might be an underlying biological explanation.
Experts have already shown that women who are stressed in pregnancy may raise the risk of their child developing asthma or other allergies.
And stress is known to trigger asthma attacks.
In the latest study the researchers followed 2,497 healthy primary school children living in Southern California and recorded how many of these developed asthma over a three-year period - 120 in total.
They also gathered information on other known asthma risk factors like exposure to traffic-related air pollution and maternal smoking, as well as parental education, income and stress levels.Read more...
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