![]() An IQR increase in elemental carbon (EC) was significantly associated with an increment of 3.0% (95% CI, 0.1–5.9%) in risk of COPD exacerbation on lag 0. Results: Per interquartile range (IQR) increment in PM 2.5 level on lag 2 were associated with increments of 6.6% (95% confidence interval (CI), 0.5–13.0%) in risk of COPD exacerbation. We used an alternative design of the Poisson time series regression models called a time-stratified and case-crossover design to analyze the data. Concentrations of PM 2.5, PM 10, and the four PM 2.5 components, including organic carbon (OC), elemental carbon (EC), nitrate (NO 3 −), and sulfate (SO 4 2−), were collected by three PM supersites in Kaohsiung City. Methods: This retrospective observational study performed in a medical center from 2007 to 2010, and enrolled non-trauma patients aged >20 years who visited the emergency department (ED) and were diagnosed as COPD. This study evaluated the effects of increased short-term exposure to PM 2.5 constituents on chronic obstructive pulmonary disease (COPD)-related emergency department (ED) visits and determined the susceptible groups. ![]() ![]() Background: PM 2.5 exposure is associated with pulmonary and airway inflammation, and the health impact might vary by PM 2.5 constitutes. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |