Ambient Air Pollution, Preeclampsia, and Preterm Delivery

Completed

• Conditions: Preterm Delivery; Preeclampsia

• Registration Number: NCT00468663
• Lead Sponsor: National Institute of Environmental Health Sciences (NIEHS)

Brief Summary

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.

Detailed Description

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.

Study Timeline

• Study Start: 2006-07
• Study First Submitted: 2007-05-02
• Study First Submitted QC: 2007-05-02
• Study First Posted: 2007-05-03
• Primary Completion: 2009-05
• Study Completion: 2009-05
• Status Verified: 2015-04
• Last Update Submitted: 2015-04-13
• Last Update Posted: 2015-04-14

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Not specified
• Target Recruitment: 4200

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

Exclusion Criteria

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified