TY - JOUR
T1 - Impact of elevated fine particulate matter (PM2.5) during landscape fire events on cardiorespiratory hospital admissions in Perth, Western Australia
AU - Shirangi, Adeleh
AU - Lin, Ting
AU - Yun, Grace
AU - Williamson, Grant J.
AU - Franklin, Peter
AU - Jian, Le
AU - Reid, Christopher M.
AU - Xiao, Jianguo
N1 - Publisher Copyright:
© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.
PY - 2024/10/9
Y1 - 2024/10/9
N2 - Background: Australia has experienced extreme fire weather in recent years. Information on the impact of fine particulate matter (PM2.5) from landscape fires (LFs) on cardiorespiratory hospital admissions is limited. Methods: We conducted a population-based time series study to assess associations between modelled daily elevated PM2.5 at a 1.5×1.5 km resolution using a modified empirical PM2.5 exposure model during LFs and hospital admissions for all-cause and cause-specific respiratory and cardiovascular diseases for the study period (2015-2017) in Perth, Western Australia. Multivariate Poisson regressions were used to estimate cumulative risk ratios (RR) with lag effects of 0-3 days, adjusted for sociodemographic factors, weather and time. Results: All-cause hospital admissions and overall cardiovascular admissions increased significantly across each elevated PM2.5 concentration on most lag days, with the strongest associations of 3% and 7%, respectively, at the high level of ≥12.60 μg/m3 on lag 1 day. For asthma hospitalisation, there was an excess relative risk of up to 16% (RR 1.16, 95% CI 1.00 to 1.35) with same-day exposure for all people, up to 93% on a lag of 1 day in children and up to 52% on a lag of 3 days in low sociodemographic groups. We also observed an increase of up to 12% (RR 1.12, 95% CI 1.02 to 1.24) for arrhythmias on the same exposure day and with over 154% extra risks for angina and 12% for heart failure in disadvantaged groups. Conclusions: Exposure to elevated PM2.5 concentrations during LFs was associated with increased risks of all-cause hospital admissions, total cardiovascular conditions, asthma and arrhythmias.
AB - Background: Australia has experienced extreme fire weather in recent years. Information on the impact of fine particulate matter (PM2.5) from landscape fires (LFs) on cardiorespiratory hospital admissions is limited. Methods: We conducted a population-based time series study to assess associations between modelled daily elevated PM2.5 at a 1.5×1.5 km resolution using a modified empirical PM2.5 exposure model during LFs and hospital admissions for all-cause and cause-specific respiratory and cardiovascular diseases for the study period (2015-2017) in Perth, Western Australia. Multivariate Poisson regressions were used to estimate cumulative risk ratios (RR) with lag effects of 0-3 days, adjusted for sociodemographic factors, weather and time. Results: All-cause hospital admissions and overall cardiovascular admissions increased significantly across each elevated PM2.5 concentration on most lag days, with the strongest associations of 3% and 7%, respectively, at the high level of ≥12.60 μg/m3 on lag 1 day. For asthma hospitalisation, there was an excess relative risk of up to 16% (RR 1.16, 95% CI 1.00 to 1.35) with same-day exposure for all people, up to 93% on a lag of 1 day in children and up to 52% on a lag of 3 days in low sociodemographic groups. We also observed an increase of up to 12% (RR 1.12, 95% CI 1.02 to 1.24) for arrhythmias on the same exposure day and with over 154% extra risks for angina and 12% for heart failure in disadvantaged groups. Conclusions: Exposure to elevated PM2.5 concentrations during LFs was associated with increased risks of all-cause hospital admissions, total cardiovascular conditions, asthma and arrhythmias.
KW - AIR POLLUTION
KW - CARDIOVASCULAR DISEASES
KW - ENVIRONMENTAL HEALTH
KW - EPIDEMIOLOGY
KW - PUBLIC HEALTH
UR - http://www.scopus.com/inward/record.url?scp=85199309124&partnerID=8YFLogxK
U2 - 10.1136/jech-2024-222072
DO - 10.1136/jech-2024-222072
M3 - Article
C2 - 39013602
AN - SCOPUS:85199309124
SN - 0143-005X
VL - 78
SP - 705
EP - 712
JO - Journal of Epidemiology and Community Health
JF - Journal of Epidemiology and Community Health
IS - 11
M1 - jech-2024-222072
ER -