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The relative importance of macro versus micro geographical scale in explaining suicide variation in Seoul, South Korea 2014-2016open access

Authors
Lee, Hwa-YoungKim, RockliJang, Soong-NangKawachi, Ichiro
Issue Date
9-9월-2022
Publisher
PUBLIC LIBRARY SCIENCE
Citation
PLOS ONE, v.17, no.9
Indexed
SCIE
SCOPUS
Journal Title
PLOS ONE
Volume
17
Number
9
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/145538
DOI
10.1371/journal.pone.0273866
ISSN
1932-6203
Abstract
Background As ecological factors are getting attention as important determinants of suicide, it is important to identify the unit at which the largest variation exists for more tailed strategy to prevent suicide. We examined the relative importance of two administrative levels for geographic variation in the suicide rate between 2014-2016 in Seoul, the capital city of Korea. Methods Two-level linear regression with Dongs (level 1) nested within Gus (level 2) was performed based on suicide death data aggregated at the Dong-level. We performed pooled analyses and then year-stratified analyses. Dong-level socioeconomic status and environmental characteristics were included as control variables. Results The overall age-and sex-standardized suicide rate across all Dongs decreased over time from 24.9 deaths per 100,000 in 2014 to 23.7 deaths in 2016. When Dong and Gu units were simultaneously considered in a multilevel analysis, most of the variation in suicide rate was attributed to within-Gu, between-Dong differences with a contribution of Gu-level being small and decreasing over time in year (Variance partitioning coefficient of Gu = 5.3% in 2014, < 0.1% in 2015 and 2016). The number of divorce cases per 100,000 explained a large fraction of variation in suicide rate at the Dong-level. Conclusions Findings from this study suggest that ecological micro-area unit is more important in reducing the geographic variation in the suicide rate. More diverse ecological-level data needs to be collected for targeted area-based suicide prevention policies in Korea.
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