Acute and recent air pollution exposure and cardiovascular events at labour and delivery. Academic Article uri icon

abstract

  • OBJECTIVE: To study the relationship between acute air pollution exposure and cardiovascular events during labour/delivery. METHODS: The Consortium on Safe Labor (2002-2008), an observational US cohort with 223,502 singleton deliveries provided electronic medical records. Air pollution exposure was estimated by modified Community Multiscale Air Quality models. Cardiovascular events (cardiac failure/arrest, stroke, myocardial infarcts and other events) were recorded in the hospital discharge records for 687 pregnancies (0.3%). Logistic regression with generalised estimating equations estimated the relationship between cardiovascular events and daily air pollutant levels for delivery day and the 7days preceding delivery. RESULTS: Increased odds of cardiovascular events were observed for each IQR increase in exposure to nitric oxides at 5 and 6days prior to delivery (OR=1.17, 99% CI 1.04 to 1.30 and OR=1.15, 1.03 to 1.28, respectively). High exposure to toxic air pollution species such as ethylbenzene (OR=1.50, 1.08 to 2.09), m-xylene (OR=1.54, 1.11 to 2.13), o-xylene (OR=1.51, 1.09 to 2.09), p-xylene (OR=1.43, 1.03 to 1.99) and toluene (OR=1.42, 1.02 to 1.97) at 5days prior to delivery were also associated with cardiovascular events. Decreased odds of events were observed with exposure to ozone. CONCLUSIONS: Air pollution in the days prior to delivery, especially nitrogen oxides and some toxic air pollution species, was associated with increased risk of cardiovascular events during the labour/delivery admission.

published proceedings

  • Heart

altmetric score

  • 32.5

author list (cited authors)

  • Mnnist, T., Mendola, P., Laughon Grantz, K., Leishear, K., Sundaram, R., Sherman, S., Ying, Q. i., & Liu, D.

citation count

  • 20

complete list of authors

  • Männistö, Tuija||Mendola, Pauline||Laughon Grantz, Katherine||Leishear, Kira||Sundaram, Rajeshwari||Sherman, Seth||Ying, Qi||Liu, Danping

publication date

  • September 2015

publisher

  • BMJ  Publisher

published in