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Air Pollution
Early births linked to highway proximity (#1941)
2011-04-07
Women who live near freeways and highways are more likely to give birth prematurely, new research suggests.
The link between the concentration of major road routes around a woman's home and early birth is revealed in a study of 970 mothers and their newborn babies in Logan City, south of Brisbane.
The more freeways and highways around a pregnant woman's home, the higher the likelihood of an early delivery, says Associate Professor Adrian Barnett, from the Queensland University of Technology's Institute of Health and Biomedical Innovation.
"The most striking result was the reduction in gestation time of 4.
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4 per cent - or almost two weeks - associated with an increase in freeways within 400 meters of the women's home," he said.
Prof Barnett has previously published a study that found a strong association between increased air pollution and small fetus size.
"Although the increased risks are relatively small, the public health implications are large because everyone living in an urban area gets exposed to air pollution," he said. "Pre-term and low-birth weight babies stay in hospital longer after birth, have an increased risk of death and are more likely to develop disabilities."
"We examined the distance between the home and busy roads to find the distance at which most of the negative effects on birth outcomes occurred because this has implications for local governments planning expansions or new roads," he added.
Most of the effects were within a 200-meter radius but negative health effects were present up to 400 meters.
Prof Barnett said the study had also taken into account the effects of smoking levels and the socio-economic status of the mothers.
"This study points to the fact that pregnant women should reduce their exposure to traffic. A reduction in traffic emissions through improved vehicles or increased public transport use would have immediate health benefits by giving children a better start to life."
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Women who live near freeways and highways are more likely to give birth prematurely, new research suggests.
