Association between dust storm occurrence and risk of suicide: Case-crossover analysis of the Korean national death database

Hyewon Lee, Jiyun Jung, Woojae Myung, Ji Hyun Baek, Jae Myeong Kang, Doh Kwan Kim, Ho Kim

Research output: Contribution to journalArticle

Abstract

Background: Asian dust storms (ADSs) have been associated with adverse health outcomes, including respiratory and cardiovascular diseases. Considering the increasing global desertification driven by climate change, it is necessary to assess dust storm-related adverse health effects for establishing appropriate public health interventions. Recent studies have found that ambient air pollution has negative effects on mental health including cognitive disorders, depression, and suicide. However, these studies mostly focused on traditional anthropogenic pollutants from traffic exhaust or fossil fuel power plants; the association between dust storms and suicidal death is yet to be determined. Objective: To assess the association between ADSs and suicide risk in Seoul, South Korea from 2002 to 2015. Methods: To determine whether increased risk of suicide is associated with occurrence of ADSs, we performed a time-stratified case-crossover study that linked the national death statistics database with ADS occurrence data from the Korea Meteorology Administration. Exposure to ADSs was compared between the day of suicide and control days, matched to the day of the week, month, and year. We further examined whether the effect of ADSs on suicide risk differed according to ADS duration and intensity. Results: Over the 14-year period, 30,704 people died by suicide and 133 ADSs were reported. Of these, 55 ADSs lasted over 2 days (long-duration ADSs), and 67 ADSs had higher levels of particulate matter < 10 μm in diameter (PM10) that exceeded the 50th percentile value over the total 133 ADS days (high-intensity ADSs). Exposure to ADS was associated with a 13.1% (95% confidence interval [CI], 4.5–22.4; P = .002) increase in suicide risk on the day of ADS occurrence. Long-duration and high-intensity ADSs were associated with a 19.8% (95% CI, 6.5–34.7; P = .003) and 17.0% (95% CI, 5.2–30.0; P = .004) increase in suicide risk, respectively. These associations remained robust after adjusting for local air pollution levels and meteorological factors. However, this association was not replicated in the unconstrained distributed lag model which revealed inferior goodness-of-fit to our data. Conclusions: Exposure to ADSs was associated with an increased risk of suicide, especially on the same day. This study provides novel evidence of a relationship between ADSs and suicide. These findings could help in establishing public health interventions for suicide prevention as well as in establishing dust storm warning systems. Future studies are warranted to confirm if our findings are replicable and to elucidate the underlying mechanisms.

Original languageEnglish
Article number105146
JournalEnvironment International
Volume133
DOIs
StatePublished - Dec 2019

Fingerprint

suicide
dust storm
analysis
confidence interval
public health
atmospheric pollution

Keywords

  • Asian dust storms
  • Duration
  • Dust storms
  • Intensity
  • Mental health
  • Suicide

Cite this

Lee, Hyewon ; Jung, Jiyun ; Myung, Woojae ; Baek, Ji Hyun ; Kang, Jae Myeong ; Kim, Doh Kwan ; Kim, Ho. / Association between dust storm occurrence and risk of suicide : Case-crossover analysis of the Korean national death database. In: Environment International. 2019 ; Vol. 133.
@article{4fffdf5ad1fc47b39185459fa88b349c,
title = "Association between dust storm occurrence and risk of suicide: Case-crossover analysis of the Korean national death database",
abstract = "Background: Asian dust storms (ADSs) have been associated with adverse health outcomes, including respiratory and cardiovascular diseases. Considering the increasing global desertification driven by climate change, it is necessary to assess dust storm-related adverse health effects for establishing appropriate public health interventions. Recent studies have found that ambient air pollution has negative effects on mental health including cognitive disorders, depression, and suicide. However, these studies mostly focused on traditional anthropogenic pollutants from traffic exhaust or fossil fuel power plants; the association between dust storms and suicidal death is yet to be determined. Objective: To assess the association between ADSs and suicide risk in Seoul, South Korea from 2002 to 2015. Methods: To determine whether increased risk of suicide is associated with occurrence of ADSs, we performed a time-stratified case-crossover study that linked the national death statistics database with ADS occurrence data from the Korea Meteorology Administration. Exposure to ADSs was compared between the day of suicide and control days, matched to the day of the week, month, and year. We further examined whether the effect of ADSs on suicide risk differed according to ADS duration and intensity. Results: Over the 14-year period, 30,704 people died by suicide and 133 ADSs were reported. Of these, 55 ADSs lasted over 2 days (long-duration ADSs), and 67 ADSs had higher levels of particulate matter < 10 μm in diameter (PM10) that exceeded the 50th percentile value over the total 133 ADS days (high-intensity ADSs). Exposure to ADS was associated with a 13.1{\%} (95{\%} confidence interval [CI], 4.5–22.4; P = .002) increase in suicide risk on the day of ADS occurrence. Long-duration and high-intensity ADSs were associated with a 19.8{\%} (95{\%} CI, 6.5–34.7; P = .003) and 17.0{\%} (95{\%} CI, 5.2–30.0; P = .004) increase in suicide risk, respectively. These associations remained robust after adjusting for local air pollution levels and meteorological factors. However, this association was not replicated in the unconstrained distributed lag model which revealed inferior goodness-of-fit to our data. Conclusions: Exposure to ADSs was associated with an increased risk of suicide, especially on the same day. This study provides novel evidence of a relationship between ADSs and suicide. These findings could help in establishing public health interventions for suicide prevention as well as in establishing dust storm warning systems. Future studies are warranted to confirm if our findings are replicable and to elucidate the underlying mechanisms.",
keywords = "Asian dust storms, Duration, Dust storms, Intensity, Mental health, Suicide",
author = "Hyewon Lee and Jiyun Jung and Woojae Myung and Baek, {Ji Hyun} and Kang, {Jae Myeong} and Kim, {Doh Kwan} and Ho Kim",
year = "2019",
month = "12",
doi = "10.1016/j.envint.2019.105146",
language = "English",
volume = "133",
journal = "Environment International",
issn = "0160-4120",
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Association between dust storm occurrence and risk of suicide : Case-crossover analysis of the Korean national death database. / Lee, Hyewon; Jung, Jiyun; Myung, Woojae; Baek, Ji Hyun; Kang, Jae Myeong; Kim, Doh Kwan; Kim, Ho.

In: Environment International, Vol. 133, 105146, 12.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Association between dust storm occurrence and risk of suicide

T2 - Case-crossover analysis of the Korean national death database

AU - Lee, Hyewon

AU - Jung, Jiyun

AU - Myung, Woojae

AU - Baek, Ji Hyun

AU - Kang, Jae Myeong

AU - Kim, Doh Kwan

AU - Kim, Ho

PY - 2019/12

Y1 - 2019/12

N2 - Background: Asian dust storms (ADSs) have been associated with adverse health outcomes, including respiratory and cardiovascular diseases. Considering the increasing global desertification driven by climate change, it is necessary to assess dust storm-related adverse health effects for establishing appropriate public health interventions. Recent studies have found that ambient air pollution has negative effects on mental health including cognitive disorders, depression, and suicide. However, these studies mostly focused on traditional anthropogenic pollutants from traffic exhaust or fossil fuel power plants; the association between dust storms and suicidal death is yet to be determined. Objective: To assess the association between ADSs and suicide risk in Seoul, South Korea from 2002 to 2015. Methods: To determine whether increased risk of suicide is associated with occurrence of ADSs, we performed a time-stratified case-crossover study that linked the national death statistics database with ADS occurrence data from the Korea Meteorology Administration. Exposure to ADSs was compared between the day of suicide and control days, matched to the day of the week, month, and year. We further examined whether the effect of ADSs on suicide risk differed according to ADS duration and intensity. Results: Over the 14-year period, 30,704 people died by suicide and 133 ADSs were reported. Of these, 55 ADSs lasted over 2 days (long-duration ADSs), and 67 ADSs had higher levels of particulate matter < 10 μm in diameter (PM10) that exceeded the 50th percentile value over the total 133 ADS days (high-intensity ADSs). Exposure to ADS was associated with a 13.1% (95% confidence interval [CI], 4.5–22.4; P = .002) increase in suicide risk on the day of ADS occurrence. Long-duration and high-intensity ADSs were associated with a 19.8% (95% CI, 6.5–34.7; P = .003) and 17.0% (95% CI, 5.2–30.0; P = .004) increase in suicide risk, respectively. These associations remained robust after adjusting for local air pollution levels and meteorological factors. However, this association was not replicated in the unconstrained distributed lag model which revealed inferior goodness-of-fit to our data. Conclusions: Exposure to ADSs was associated with an increased risk of suicide, especially on the same day. This study provides novel evidence of a relationship between ADSs and suicide. These findings could help in establishing public health interventions for suicide prevention as well as in establishing dust storm warning systems. Future studies are warranted to confirm if our findings are replicable and to elucidate the underlying mechanisms.

AB - Background: Asian dust storms (ADSs) have been associated with adverse health outcomes, including respiratory and cardiovascular diseases. Considering the increasing global desertification driven by climate change, it is necessary to assess dust storm-related adverse health effects for establishing appropriate public health interventions. Recent studies have found that ambient air pollution has negative effects on mental health including cognitive disorders, depression, and suicide. However, these studies mostly focused on traditional anthropogenic pollutants from traffic exhaust or fossil fuel power plants; the association between dust storms and suicidal death is yet to be determined. Objective: To assess the association between ADSs and suicide risk in Seoul, South Korea from 2002 to 2015. Methods: To determine whether increased risk of suicide is associated with occurrence of ADSs, we performed a time-stratified case-crossover study that linked the national death statistics database with ADS occurrence data from the Korea Meteorology Administration. Exposure to ADSs was compared between the day of suicide and control days, matched to the day of the week, month, and year. We further examined whether the effect of ADSs on suicide risk differed according to ADS duration and intensity. Results: Over the 14-year period, 30,704 people died by suicide and 133 ADSs were reported. Of these, 55 ADSs lasted over 2 days (long-duration ADSs), and 67 ADSs had higher levels of particulate matter < 10 μm in diameter (PM10) that exceeded the 50th percentile value over the total 133 ADS days (high-intensity ADSs). Exposure to ADS was associated with a 13.1% (95% confidence interval [CI], 4.5–22.4; P = .002) increase in suicide risk on the day of ADS occurrence. Long-duration and high-intensity ADSs were associated with a 19.8% (95% CI, 6.5–34.7; P = .003) and 17.0% (95% CI, 5.2–30.0; P = .004) increase in suicide risk, respectively. These associations remained robust after adjusting for local air pollution levels and meteorological factors. However, this association was not replicated in the unconstrained distributed lag model which revealed inferior goodness-of-fit to our data. Conclusions: Exposure to ADSs was associated with an increased risk of suicide, especially on the same day. This study provides novel evidence of a relationship between ADSs and suicide. These findings could help in establishing public health interventions for suicide prevention as well as in establishing dust storm warning systems. Future studies are warranted to confirm if our findings are replicable and to elucidate the underlying mechanisms.

KW - Asian dust storms

KW - Duration

KW - Dust storms

KW - Intensity

KW - Mental health

KW - Suicide

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U2 - 10.1016/j.envint.2019.105146

DO - 10.1016/j.envint.2019.105146

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JF - Environment International

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