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META ANALYSIS
Year : 2022  |  Volume : 11  |  Issue : 1  |  Page : 103

The association between exposure to air pollution and type 1 diabetes mellitus: A systematic review and meta-analysis


1 Child Growth and Development Research Center, Research Institute for Primordial Prevention of Noncommunicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
2 Metabolic Liver Disease Research Center, Isfahan University of Medical Sciences; Isfahan Endocrine and Metabolism Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
3 Department of Pathology, Isfahan University of Medical Sciences, Isfahan, Iran
4 Metabolic Liver Disease Research Center, Isfahan University of Medical Sciences; Imam Hossein Children’s Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
5 Isfahan Endocrine and Metabolism Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
6 Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences; Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran

Correspondence Address:
Dr. Ensiyeh Taheri
Department of Environmental Health Engineering, School of Health, Isfahan, University of Medical Sciences, Isfahan
Iran
Dr. Silva Hovsepian
Metabolic Liver Disease Research Center, Imam Hossein Children’s Hospital, Isfahan University of Medical Sciences, Isfahan
Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/abr.abr_80_21

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Background: This systematic review and meta-analysis aimed to overview the observational studies on the association of exposure to air pollution and type 1 diabetes mellitus (T1DM). Materials and Methods: Based on PRISMA guidelines, we systematically reviewed the databases of PubMed, Scopus, Embase, and Web of Science databases to determine the association of air pollution exposure and T1DM. Quality assessment of the papers was evaluated using the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist for observational studies. The odds ratios (OR) and their 95% confidence intervals (CI) were calculated to assess the strength of the associations between air pollutants (gases and particulate matter air pollutants including PM10, PM2.5, NO2, volatile organic compound, SO4, SO2, O3) and T1DM. Results: Out of 385 initially identified papers, 6 studies were used for this meta-analysis. Fixed effects meta-analysis showed a significant association between per 10 μg/m3 increase in O3 and PM2.5 exposures with the increased risk of T1DM (3 studies, OR = 1.51, 95% CI: 1.26, 1.80, I2 = 83.5% for O3 and two studies, OR = 1.03, 95% CI: 1.01, 1.05, I2 = 76.3% for PM2.5).There was no evidence of association between increased risk of T1DM and exposure to PM10 (OR = 1.02, 95% CI: 0.99–1.06, I2 = 59.4%), SO4 (OR = 1.16, 95% CI: 0.91–1.49, I2 = 93.8%), SO2 (OR = 0.94, 95% CI: 0.83–1.06, I2 = 85.0%), and NO2 (OR = 0.995,95% CI: 1.05–1.04, I2 = 24.7%). Conclusion: Recent publications indicated that exposure to ozone and PM2.5 may be a risk factor for T1DM. However, due to limited available studies, more prospective cohort studies are needed to clarify the role of air pollutants in T1DM occurrence.


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