Alice Trye1, Kenneth I Berger2, Mrudula Naidu1, Teresa M Attina1, Joseph Gilbert1, Tony T Koshy1, Xiaoxia Han3, Michael Marmor3, Yongzhao Shao4, Robert Giusti1, Roberta M Goldring2, Leonardo Trasande5. 1. Department of Pediatrics, New York University School of Medicine, New York, NY. 2. Department of Medicine, New York University School of Medicine, New York, NY. 3. Department of Population Health, New York University School of Medicine, New York, NY. 4. Department of Population Health, New York University School of Medicine, New York, NY; Department of Environmental Medicine, New York University School of Medicine, New York, NY. 5. Department of Pediatrics, New York University School of Medicine, New York, NY; Department of Population Health, New York University School of Medicine, New York, NY; Department of Environmental Medicine, New York University School of Medicine, New York, NY; New York University Wagner School of Public Service, New York, NY; New York University College of Global Public Health, New York, NY. Electronic address: leonardo.trasande@nyumc.org.
Abstract
OBJECTIVES: To compare lung function in a representative sample of World Trade Center (WTC)-exposed children with matched comparisons, and examine relationships with reported exposures. STUDY DESIGN: Study population consisted of 402 participants. Oscillometry, spirometry, and plethysmography were performed on WTC Health Registry (WTCHR) respondents who were ≤8 years of age on September 11, 2001 (n = 180) and a sociodemographically matched group of New York City residents (n = 222). We compared lung function by study arm (WTCHR and comparison group) as well as dust cloud (acute); home dust (subchronic); and other traumatic, nondust exposures. RESULTS: In multivariable models, post-9/11 risk of incident asthma was higher in the WTCHR participants than in the comparison group (OR 1.109, 95% CI 1.021, 1.206; P = .015). Comparing by exposure rather than by group, dust cloud (OR 1.223, 95% CI 1.095, 1.365; P < .001) and home dust (OR 1.123, 95% CI 1.029, 1.226; P = .009) exposures were also associated with a greater risk of incidence of post-9/11 asthma. No differences were identified for lung function measures. CONCLUSIONS: Although we cannot exclude an alternative explanation to the null findings, these results may provide some measure of reassurance to exposed children and their families regarding long-term consequences. Further study with bronchodilation and/or methacholine challenge may be needed to identify and further evaluate effects of WTC exposure. Biomarker studies may also be more informative in delineating exposure-outcome relationships. TRIAL REGISTRATION: ClinicalTrials.gov: NCT02068183.
OBJECTIVES: To compare lung function in a representative sample of World Trade Center (WTC)-exposed children with matched comparisons, and examine relationships with reported exposures. STUDY DESIGN: Study population consisted of 402 participants. Oscillometry, spirometry, and plethysmography were performed on WTC Health Registry (WTCHR) respondents who were ≤8 years of age on September 11, 2001 (n = 180) and a sociodemographically matched group of New York City residents (n = 222). We compared lung function by study arm (WTCHR and comparison group) as well as dust cloud (acute); home dust (subchronic); and other traumatic, nondust exposures. RESULTS: In multivariable models, post-9/11 risk of incident asthma was higher in the WTCHR participants than in the comparison group (OR 1.109, 95% CI 1.021, 1.206; P = .015). Comparing by exposure rather than by group, dust cloud (OR 1.223, 95% CI 1.095, 1.365; P < .001) and home dust (OR 1.123, 95% CI 1.029, 1.226; P = .009) exposures were also associated with a greater risk of incidence of post-9/11 asthma. No differences were identified for lung function measures. CONCLUSIONS: Although we cannot exclude an alternative explanation to the null findings, these results may provide some measure of reassurance to exposed children and their families regarding long-term consequences. Further study with bronchodilation and/or methacholine challenge may be needed to identify and further evaluate effects of WTC exposure. Biomarker studies may also be more informative in delineating exposure-outcome relationships. TRIAL REGISTRATION: ClinicalTrials.gov: NCT02068183.
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