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Long-term Exposure to Ambient Air Pollution and Incidence of Brain Tumor: the European Study of Cohorts for Air Pollution Effects (ESCAPE)
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2018 (English)In: Neuro-Oncology, ISSN 1522-8517, E-ISSN 1523-5866, Vol. 20, no 3, p. 420-432Article in journal (Refereed) Published
Abstract [en]

Background: Epidemiological evidence on the association between ambient air pollution and brain tumor risk is sparse and inconsistent.

Methods: In 12 cohorts from 6 European countries, individual estimates of annual mean air pollution levels at the baseline residence were estimated by standardized land-use regression models developed within the ESCAPE and TRANSPHORM projects: particulate matter (PM) ≤2.5, ≤10, and 2.5–10 μm in diameter (PM2.5, PM10, and PMcoarse), PM2.5 absorbance, nitrogen oxides (NO2 and NOx) and elemental composition of PM. We estimated cohort-specific associations of air pollutant concentrations and traffic intensity with total, malignant, and nonmalignant brain tumor, in separate Cox regression models, adjusting for risk factors, and pooled cohort-specific estimates using random-effects meta-analyses.

Results: Of 282194 subjects from 12 cohorts, 466 developed malignant brain tumors during 12 years of follow-up. Six of the cohorts also had data on nonmalignant brain tumor, where among 106786 subjects, 366 developed brain tumor: 176 nonmalignant and 190 malignant. We found a positive, statistically nonsignificant association between malignant brain tumor and PM2.5 absorbance (hazard ratio and 95% CI: 1.67; 0.89–3.14 per 10–5/m3), and weak positive or null associations with the other pollutants. Hazard ratio for PM2.5 absorbance (1.01; 0.38–2.71 per 10–5/m3) and all other pollutants were lower for nonmalignant than for malignant brain tumors.

Conclusion: We found suggestive evidence of an association between long-term exposure to PM2.5 absorbance indicating traffic-related air pollution and malignant brain tumors, and no association with overall or nonmalignant brain tumors.

Place, publisher, year, edition, pages
Oxford University Press, 2018. Vol. 20, no 3, p. 420-432
Keywords [en]
air pollution, brain cancer, brain tumor, traffic
National Category
Occupational Health and Environmental Health
Identifiers
URN: urn:nbn:se:umu:diva-140538DOI: 10.1093/neuonc/nox163ISI: 000425492600015PubMedID: 29016987Scopus ID: 2-s2.0-85042325926OAI: oai:DiVA.org:umu-140538DiVA, id: diva2:1149038
Conference
Neuro Oncol. 2018 Feb 19;20(3):420-432. doi: 10.1093/neuonc/nox163.
Available from: 2017-10-13 Created: 2017-10-13 Last updated: 2018-06-15Bibliographically approved

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Nilsson Sommar, JohanForsberg, BertilOlsson, David
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