关键词: 空气污染, PM2.5, 2型糖尿病

Abstract: Objective In recent years, many studies have reported that air pollution is a risk factor for type 2 diabetes mellitus (T2DM). The aim of this systematic review and meta-analysis is to summarize the evidence about the association between exposure to air pollution and T2DM in developing countries.
Methods The databases, including PubMed, EMBASE and Web of Science, were systematically searched for studies published up to 31 March 2022. Studies about the association between air pollution and T2DM prevalence or incidence in developing countries were included. The odds ratio (OR) was used as effect estimate. We synthesized the included studies in meta-analyses.
Results We included 8 cross-sectional studies and 8 cohort studies, all conducted in developing countries. Meta-analyses of 8 studies on PM2.5 (particulate matter ≤ 2.5 μm in diameter) showed that the overall effect estimate of T2DM prevalence upon exposure to PM2.5 was 1.12 (95% CI: 1.07, 1.17). The association between air pollutants and T2DM incidence was not estimated due to the limited relevant studies.
Conclusions The exposure to PM2.5 would be positively associated with an increased prevalence of T2DM in developing countries. Some effective measures should be taken to reduce air pollution exposure in people who are vulnerable to diabetes.

Key words: Air pollutants, PM2.5, Type 2 diabetes mellitus