Ultrafine Particle Number Concentration Model for Estimating Retrospective and Prospective Long-Term Ambient Exposures in Urban Neighborhoods
- 4 February 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in Environmental Science & Technology
- Vol. 54 (3), 1677-1686
- https://doi.org/10.1021/acs.est.9b03369
Abstract
Short-term exposure to ultrafine particles (UFP; <100 nm in diameter), which are present at high concentrations near busy roadways, is associated with markers of cardiovascular and respiratory disease risk. To date, few long-term studies (months to years) have been conducted due to the challenges of long-term exposure assignment. To address this, we modified hybrid land-use regression models of particle number concentrations (PNCs; a proxy for UFP) for two study areas in Boston (MA) by replacing the measured PNC term with an hourly model and adjusting for overprediction. The hourly PNC models used covariates for meteorology, traffic, and sulfur dioxide concentrations (a marker of secondary particle formation). We compared model performance against long-term PNC data collected continuously from 9 years before and up to 3 years after the model-development period. Model predictions captured the major temporal variations in the data and model performance remained relatively stable retrospectively and prospectively. The Pearson correlation of modeled versus measured hourly log-transformed PNC at a long-term monitoring site for 9 years prior was 0.74. Our results demonstrate that highly resolved spatial-temporal PNC models are capable of estimating ambient concentrations retrospectively and prospectively with generally good accuracy, giving us confidence in using these models in epidemiological studies.Funding Information
- National Institute of Environmental Health Sciences (ES015462)
- National Heart, Lung, and Blood Institute (P50 HL105185)
- National Institute on Aging (P01 AG023394)
This publication has 42 references indexed in Scilit:
- Direct Observations of Atmospheric Aerosol NucleationScience, 2013
- Temporal stability of land use regression models for traffic-related air pollutionAtmospheric Environment, 2012
- Land Use Regression Modeling To Estimate Historic (1962−1991) Concentrations of Black Smoke and Sulfur Dioxide for Great BritainEnvironmental Science & Technology, 2011
- Stability of measured and modelled spatial contrasts in NO2 over timeOccupational and Environmental Medicine, 2011
- Near-Roadway Air Quality: Synthesizing the Findings from Real-World DataEnvironmental Science & Technology, 2010
- Traffic-related Air Pollution and Blood Pressure in Elderly Subjects With Coronary Artery DiseaseEpidemiology, 2010
- The Boston Puerto Rican Health Study, a longitudinal cohort study on health disparities in Puerto Rican adults: challenges and opportunitiesBMC Public Health, 2010
- Generalized Collinearity DiagnosticsJournal of the American Statistical Association, 1992
- STATISTICAL METHODS FOR ASSESSING AGREEMENT BETWEEN TWO METHODS OF CLINICAL MEASUREMENTThe Lancet, 1986
- RelationshipsBetween 24-Hour MeanAir Quality MeasurementsandMeteorological Factorsin Nashville, TennesseeJournal of the Air Pollution Control Association, 1961