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Title
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Does air pollution trigger suicide? A case-crossover analysis of suicide deaths over the life span
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Author
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Abstract
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| In addition to underlying health disorders and socio-economic or community factors, air pollution may trigger suicide mortality. This study evaluates the association between short-term variation in air pollution and 10 years of suicide mortality in Belgium. In a bidirectional time-stratified case-crossover design, 20,533 suicide deaths registered between January 1st 2002 and December 31st 2011 were matched by temperature with control days from the same month and year. We used municipality-level air pollution [particulate matter (PM10) and O-3 concentrations] data and meteorology data. We applied conditional logistic regression models adjusted for duration of sunshine and day of the week to obtain odds ratios (OR) and their 95% CI for an increase of 10 mu g/m(3) in pollutant concentrations over different lag periods (lag 0, 0-1, 0-2, 0-3, 0-4, 0-5, and 0-6 days). Effect modification by season and age was investigated by including interaction terms. We observed significant associations of PM10 and O-3 with suicide during summer (OR ranging from 1.02 to 1.07, p-values <0.05). For O-3, significant associations were also observed during spring and autumn. Age significantly modified the associations with PM10, with statistically significant associations observed only among 5-14 year old children (lag 0-6: OR = 1.45; 95% CI: 1.03-2.04) and >= 85 years old (e.g. lag 0-4: OR = 1.17; 95% CI: 1.06-1.29). Recent increases in outdoor air pollutants such as PM10 or O-3 can trigger suicide, particularly during warm periods, even at concentrations below the European thresholds. Furthermore, PM10 may have strong trigger effects among children and elderly population. |
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Language
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English
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Source (journal)
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European journal of epidemiology. - Roma, 1985, currens
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Publication
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Roma
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2017
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ISSN
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0393-2990
[print]
1573-7284
[online]
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DOI
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10.1007/S10654-017-0273-8
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Volume/pages
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32
:11
(2017)
, p. 973-981
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ISI
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000415124400004
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Pubmed ID
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28623424
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Full text (Publisher's DOI)
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