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Table 8 Four high-frequent topics in the research of particulate matter and atherosclerosis

From: Particulate matter and atherosclerosis: a bibliometric analysis of original research articles published in 1973–2014

Topics Cluster Explained variation, %
Topic 1. Epidemiological studies on the associations between tobacco exposure and atherosclerosis Clusters 1, 3, and 9 3.5, 10.67, 4.44
Topic 2. Epidemiological studies on the associations between environmental particulate matter exposure and atherosclerosis Clusters 2 and 4 24.44, 1.33
Topic 3. studies on the different roles of particulate matter size/components/source in health effects Clusters 6 and 10 35.11, 7.11
Topic 4. Toxicological studies on particulate matter-induced arteriosclerosis Clusters 5, 7, and 8 6.67, 2.67, 3.11