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Ambient Air Pollution, Preecl...

Ambient Air Pollution, Preeclampsia, and Preterm Delivery

Last Updated: 2015-04-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

4200 participants

Study Classification

OBSERVATIONAL

Study Start Date

2006-07-31

Study Completion Date

2009-05-31

Brief Summary

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An epidemiologic study of pregnant women in western Washington to measure the relationships between exposure to air pollutants and risks of preeclampsia and preterm delivery.

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Detailed Description

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We will design models that use local traffic, weather, and population characteristics to predict monthly ambient concentrations of fine particulate matter (PM2.5) and carbon monoxide (CO). These models will be used to estimate study participants' PM2.5 and CO exposures during and before pregnancy. We will test whether these air pollutant exposures are associated with subsequent risk of preeclampsia and preterm delivery. Additionally, we will test biological markers of maternal lipid peroxidation (thiobarbituric acid reactive substances) and inflammation (high sensitivity C-reactive protein) in maternal blood samples drawn during early pregnancy. We will also examine carboxyhemoglobin measured in early-pregnancy maternal blood samples as a marker of CO exposure.

Conditions

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Preeclampsia Preterm Delivery

Study Design

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Study Time Perspective

PROSPECTIVE

Eligibility Criteria

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Inclusion Criteria

* English speaking
* enrolled in parent study
* pregnant at \<20 weeks gestation and attending prenatal care clinics affiliated with Swedish Medical Center and Tacoma General Hospital