Open AccessSingle‐day and cumulative effects of ambient particulate matter exposure on emergency department visits for respiratory disease in South Korea
Author(s) -
Kim Hakjung,
Yu Woosung
Publication year - 2022
Publication title -
hong kong journal of emergency medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 12
eISSN - 2309-5407
pISSN - 1024-9079
DOI - 10.1177/1024907920965305
Subject(s) - medicine , emergency department , exacerbation , poisson regression , particulates , respiratory system , emergency medicine , names of the days of the week , environmental health , population , ecology , linguistics , philosophy , psychiatry , biology
Background: Along with the industrialization, the air pollutants have gained more attention and studies especially about respiratory diseases were conducted. Emergency visit reflects acute aggravation of disease rather than chronic exacerbation. Objectives: The objective of this study was to evaluate the relationship between the ambient particulate matter and the emergency visits with respiratory disease in South Korea. Methods: Patients diagnosed with respiratory disease in the emergency department in 2018 were enrolled. The data of meteorological factors and air pollutants between 4 December 2017 and 31 December 2018 were acquired. Poisson regression was used with daily emergency visits as the response variable and single‐day particulate matter concentration as the explanatory variable. Results: A total of 4207 patients were enrolled. In Poisson regression analysis of all respiratory diseases, the effects of P M10and P M2 . 5were strongest at day before 8 and 26. Age older than 65 group and chronic respiratory disease group had earlier lag effect than the all‐diseases group. Cumulative effect was peaked at 14 lag day. The split point of prediction was 87 µg/m 3 before 3 days for P M10and 37 µg/m 3 before 8 days for P M2 . 5. Conclusion: The results can be used to predict the increase of emergency visits and need for medical resources when the ambient particulate matter concentration rises.