Associations between ambient air pollution and mortality during a 7-year ecological time-series study

Area of Science:

• Environmental Health
• Epidemiology
• Public Health

Background:

• Air pollution is a significant global public health issue, particularly in urban environments.
• Istanbul faces challenges with ambient air quality, frequently exceeding recommended guidelines.
• Understanding the short-term health impacts of air pollution is crucial for effective public health interventions.

Purpose of the Study:

• To assess the association between daily ambient air pollution and non-accidental mortality in Istanbul.
• To quantify the short-term risks of particulate matter exposure on mortality.
• To evaluate the impact on different age groups and during periods of high pollution.

Main Methods:

• Ecological time-series study design analyzing data from 2013-2019.
• Quasi-Poisson regression models with distributed lag non-linear models (DLNM) for exposure-response analysis.
• Utilized citywide daily mean concentrations of major air pollutants from monitoring stations.

Main Results:

• A 10 µg/m² increase in PM10 was linked to a 1.7% rise in daily mortality (RR: 1.017).
• A 10 µg/m² increase in PM2.5 was associated with a 3.3% increase in daily mortality (RR: 1.033).
• Increased mortality risks were more significant in individuals aged 65 and older, and during consecutive high pollution periods.

Conclusions:

• Short-term exposure to particulate matter is associated with increased mortality in Istanbul.
• Findings support the World Health Organization's guideline values for air quality.
• Emphasizes the critical need for sustained air quality management policies to mitigate health risks.