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The Relationship between Air Pollution and Brain Cancer: A Systematic Review and Meta-Analysis
Soheil Hassanipour1, Hossein-Ali Nikbakht2, Abdeltif Amrane3
1Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Rasht, Iran.
Annals of Global Health
|June 26, 2023
Summary
Exposure to ozone (O3) and PM2.5 absorbance, components of air pollution, correlates with increased brain tumor incidence. Other pollutants showed no significant association, highlighting specific environmental risks.
Area of Science:
- Environmental Epidemiology
- Oncology
- Public Health
Background:
- Limited epidemiological data exists on ambient air pollution's impact on brain tumor risk.
- This study aimed to investigate the association between air pollution exposure and brain tumor incidence.
Approach:
- A systematic review and meta-analysis was conducted following PRISMA guidelines.
- Five databases were searched for relevant studies published up to April 15, 2019.
- Study quality was assessed using the Newcastle-Ottawa Quality Assessment Form.
Key Points:
- Five studies examining adult brain tumors and long-term exposure to air pollutants were reviewed.
- Increased brain tumor incidence showed a correlation with exposure to ozone (O3) (RR=1.3, P=0.023) and PM2.5 absorbance (RR=1.63, P=0.031).
- No statistically significant associations were found for proximity to traffic (Trafnear), PM2.5, and nitrogen oxides (NOx).
Conclusions:
- Ozone (O3) and PM2.5 absorbance exhibit the strongest correlation with brain tumor incidence.
- Certain air pollutants, including SO2, CO, NO2, PM10, and PM2.5, showed no correlation with brain tumor incidence in this review.
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