چکیده
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This study aimed to evaluate the effects of outdoor benzene, toluene, xylenes, and styrene (BTXS) on respiratory system performance
in adults living in an industrialized city. The concentration of BTXS
was measured in the three selected areas (low traffic, high traffic
and industrial). Pulmonary function of totally 219 participants who
have lived in the selected areas for at least five years, were evaluated
through the spiromertry. Based on the results, significant differences
were observed between the mean concentrations of BTXS (industrial
area>high traffic area>low traffic area). Considerable decline of
0.46 L, 0.41 L, 2.99%, 0.9 L/min, and 0.59 L/s for Forced Vital Capacity
(FVC), Forced Expiratory Volume in one second (FEV1), FEV1/FVC,
Peak Expiratory Flow (PEF) and Forced Expiratory Flow between 25%
and 75% of vital capacity (FEF25–75%), respectively, were detected in
industrial area residents compared to the low traffic region. In
addition, some spirometric parameters were different between the
other sampling sites. In conclusion, the results showed that the long
term exposure to higher concentrations of BTXS increases respiratory
dysfunction risks in industrial and high traffic areas respectively, as
compared with living in the low traffic region
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