{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T00:46:44Z","timestamp":1789778804888,"version":"4.0.1"},"reference-count":49,"publisher":"American Chemical Society (ACS)","issue":"2","license":[{"start":{"date-parts":[[2017,12,29]],"date-time":"2017-12-29T00:00:00Z","timestamp":1514505600000},"content-version":"vor","delay-in-days":4078,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2007,2,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>We previously reported an association between infant wheezing and residence &amp;lt; 100 m from stop-and-go bus and truck traffic. The use of a proximity model, however, may lead to exposure misclassification.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>Results obtained from a land use regression (LUR) model of exposure to truck and bus traffic are compared with those obtained with a proximity model. The estimates derived from the LUR model were then related to infant wheezing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We derived a marker of diesel combustion\u2014elemental carbon attributable to traffic sources (ECAT)\u2014from ambient monitoring results of particulate matter with aerodynamic diameter &amp;lt; 2.5 \u03bcm. We developed a multiple regression model with ECAT as the outcome variable. Variables included in the model were locations of major roads, bus routes, truck traffic count, and elevation. Model parameter estimates were applied to estimate individual ECAT levels at infants\u2019 homes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The levels of estimated ECAT at the monitoring stations ranged from 0.20 to 1.02 \u03bcg\/m3. A LUR model of exposure with a coefficient of determination (R2) of 0.75 was applied to infants\u2019 homes. The mean (\u00b1 SD) ambient exposure of ECAT for infants previously categorized as unexposed, exposed to stop-and-go traffic, or exposed to moving traffic was 0.32 \u00b1 0.06, 0.42 \u00b1 0.14, and 0.49 \u00b1 0.14 \u03bcg\/m3, respectively. Levels of ECAT from 0.30 to 0.90 \u03bcg\/m3 were significantly associated with infant wheezing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The LUR model resulted in a range of ECAT individually derived for all infants\u2019 homes that may reduce the exposure misclassification that can arise from a proximity model.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1289\/ehp.9480","type":"journal-article","created":{"date-parts":[[2006,10,30]],"date-time":"2006-10-30T14:31:02Z","timestamp":1162218662000},"page":"278-284","source":"Crossref","is-referenced-by-count":151,"title":["A Comparison of Proximity and Land Use Regression Traffic Exposure Models and Wheezing in Infants"],"prefix":"10.1021","volume":"115","author":[{"given":"Patrick H.","family":"Ryan","sequence":"first","affiliation":[{"name":"Department of Environmental Health, University of Cincinnati Medical 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