2020

Jet aircraft exhaust linked to preterm births


Researchers found that pregnant women exposed to high levels of particles from jet airplane exhaust are 14% more likely to have a preterm birth.

plane flying overhead

Researchers from the UCLA Fielding School of Public Health have found that pregnant women exposed to high levels of ultrafine particles from jet airplane exhaust are 14% more likely to have a preterm birth than those exposed to lower levels.

The researchers examined exposure among women living near Los Angeles International Airport (LAX), in an area that includes neighborhoods in Los Angeles, El Segundo, Hawthorne, Inglewood and other communities inland from the airport.

“The data suggest that airplane pollution contributes to preterm births above and beyond the main source of air pollution in this area, which is traffic,” said Dr. Beate Ritz, a professor in the departments of epidemiology and environmental health sciences at the UCLA Fielding School of Public Health (FSPH).

Preterm birth is associated with complications such as immature lungs, difficulty regulating body temperature, poor feeding, and slow weight gain. The research team, co-led by Ritz and Scott Fruin of the Keck School of Medicine at the University of Southern California, examined records for all births — a total of 174,186 —between 2008 and 2016 to mothers living within nine miles (15 km) of LAX. They divided the overall area into four sections based on the amount of ultrafine particle, or UFP, pollution from jet exhaust, with the section nearest the airport experiencing the highest exposure.

After adjusting for traffic-related air pollution and other variables that may affect the risk of preterm birth, including airport-related noise and the mother’s age, education level and race, they found that expectant mothers in the quarter with the highest average ultrafine particle exposure had 14% higher odds of a preterm birth than mothers in the quarter with the lowest exposure.

“Nearly two million people live within a 10-mile radius of LAX, many of whom are exposed to elevated levels of aircraft-origin UFPs,” said Sam Wing, a scholar at the Fielding School involved in the study.

The research is summarized in an article published today in the journal Environmental Health Perspectives, and is based on a lengthy study published in the spring, 2020 edition of the journal. Other authors include Timothy Larson and Sarunporn Boonyarattaphan, both of the University of Washington, and Neelakshi Hudda of Tufts University. The work was supported by grants from the National Institute of Environmental Health Sciences, part of the National Institutes of Health.


The UCLA Fielding School of Public Health, founded in 1961, is dedicated to enhancing the public's health by conducting innovative research, training future leaders and health professionals from diverse backgrounds, translating research into policy and practice, and serving our local communities and the communities of the nation and the world. The school has 690 students from 25 nations engaged in carrying out the vision of building healthy futures in greater Los Angeles, California, the nation and the world.

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