Association of urban particle numbers and sources with lung function among children with asthma or allergies
Journal
Science of the Total Environment
Journal Volume
542
Pages
841-844
Date Issued
2016
Author(s)
Abstract
Previous studies have reported sources of particle number pollution in urban air, but have not evaluated relationships between respiratory health and these sources. We compared, among children with asthma or allergies, the associations of spirometric lung functions with increased exposure to source-specific versus size-segregated particle number concentrations (PNC). Hourly measurements of PNC were acquired from the aerosol Supersite in New Taipei, Taiwan. Spirometry (FVC, FEV1, and FEF) was recorded monthly for 59 children with asthma or allergies at five schools during 2007-2008. After co-pollutant adjustment for ozone, we found a 0.21 and 0.17L decrease in FVC [95% confidence interval (CI): -0.35, -0.06L] and FEV1 (95% CI: -0.32, -0.03L), respectively, with an interquartile range increase (1879.7#/cm3) in secondary aerosol contribution observed on the previous day. In addition, we found no significant associations of FVC with accumulation mode (0.1μm
Publisher
Elsevier B.V.
Type
journal article