Sarita Hudson and colleagues published in Science of The Total Environment

July 17, 2023
Sarita Hudson and colleagues' article,

Sarita Hudson and colleagues' article, "Assessment of children's personal and land use regression model-estimated exposure to NO2 in Springfield, Massachusetts", was recently published in the journal, Science of the Total Environment.


Abstract: Ambient nitrogen dioxide (NO2) is derived from tailpipe vehicle emission and is linked with various of health outcomes. Personal exposure monitoring is crucial for accurate assessment of the associated disease risks. This study aimed to evaluate the utility of a wearable air pollutant sampler in determining the personal NO2 exposure of school children for comparison with a model-based personal exposure assessment. We employed cost-effective, wearable passive samplers to directly measure personal exposure of 25 children (aged 12–13 years) in Springfield, MA to NO2 over a five-day period in winter 2018. NO2 levels were additionally measured at 40 outdoor sites in the same region using stationary passive samplers. A land use regression (LUR) model was developed based on the ambient NO2 measures, with a good prediction performance (R2 = 0.72) using road lengths, distance to highway, and institutional land area as predictor variables. Time-weighted averages (TWA), which incorporated the time-activity patterns of participants and LUR-derived estimates in children's primary microenvironments (homes, the school and commute paths), were calculated as an indirect measure of personal NO2 exposure. Results indicated that the conventional residence-based exposure estimate approach, often used in epidemiological studies, differed from the direct personal exposure and could overestimate the personal exposure by up to 109 %. TWA improved personal NO2 exposure estimates by accounting for the time activity patterns of individuals, a difference of 5.4 % ± 34.2 % was found for exposures compared to wristband measurements. Nevertheless, the personal wristband measurements exhibited a large variability due to the potential contributions from indoor and in-vehicle NO2 sources. The findings suggest that exposure to NO2 can be highly personalized based on individual activities and contact with pollutants in specific microenvironments, reaffirming the importance of measuring personal exposure.


share this

Related Articles

April 30, 2025
Check out the recording from our recent webinar featuring Liv Anna Homstead and Francheska Bermudez. This webinar was designed to help organizations and professionals maximize their use of 413Cares.org.
April 16, 2025
Wanda Givens is a member of the leadership team for the Women of Color Health Equity Collective (WOCHEC). WOCHEC offers training and consulting services to address issues of white supremacy, health inequity, and more. As part of her work at WOCHEC, Wanda facilitates a training about cultural humility. "What I love most about facilitating Cultural Humility is not what people learn about each other, but what they learn about themselves. The more we know about how we get to be who we are, the more we can understand and relate to someone else’s journey. There’s nothing more rewarding than seeing someone come to the realization that they are more like others in the room than they are different. Our paths may take different roads, but essentially, we are all on the same journey." Did you know the Race and Health Equity Resource Guide includes a listing of organizations like WOCHEC who can help guide your organization on its anti-racism journey and more!
April 15, 2025
Healthy Air Network Launches Redesigned Website to Empower Communities with Air Quality Data; Hosting 4/30 Free Webinar