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The association between PM2.5 exposure and suicidal ideation: a prefectural panel study
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The association between PM2.5 exposure and suicidal ideation: a prefectural panel study
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Journal Article
The association between PM2.5 exposure and suicidal ideation: a prefectural panel study
2020
Overview
Background
Suicidal ideation is subject to serious underestimation among existing public health studies. While numerous factors have been recognized in affecting suicidal thoughts and behaviors (STB), the associated environmental risks have been poorly understood. Foremost among the various environment risks were air pollution, in particular, the PM2.5. The present study attempted to examine the relationship between PM
2.5
level and local weekly index of suicidal ideation (ISI).
Methods
Using Internet search query volumes in Baidu (2017), the largest internet search engine in China, we constructed a prefectural panel data (278 prefectures, 52 weeks) and employed dynamic panel GMM system estimation to analyze the relationship between weekly concentration of PM2.5 (Mean = 87 μg·m
− 3
) and the index of suicidal ideation (Mean = 49.9).
Results
The results indicate that in the spring and winter, a 10 μg·m
− 3
increase in the prior week’s PM
2.5
in a Chinese city is significantly associated with 0.020 increase in ISI in spring and a 0.007 increase in ISI in winter, after taking account other co-pollutants and meteorological conditions.
Conclusion
We innovatively proposed the measure of suicidal ideation and provided suggestive evidence of a positive association between suicidal ideation and PM
2.5
level.
