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Seasonality and climatic associations with violent and nonviolent suicide: a population-based study.
Neuropsychobiology. 2008; 57(1-2):32-7.N

Abstract

BACKGROUND

Using 7-year population-based data on Taiwan, we examined seasonal variation in violent versus nonviolent suicide, and its association with meteorological factors: ambient temperature, relative humidity, atmospheric pressure, rainfall and daily sunshine hours.

METHODS

We used Taiwan's nationwide mortality data from 1997 to 2003, categorizing the sample decedents into two groups, violent (ICD-9-CM codes E953-E958) and nonviolent (E950-E952) suicide, based on the suicide method used. Seasonal autoregressive integrated moving average (SARIMA) modeling was used to detect seasonality of suicide, and the association of climate variables with violent versus nonviolent suicide.

RESULTS

The SARIMA test of seasonality was significant for both genders and the pooled sample (all p < 0.001) in violent suicide deaths, but not nonviolent suicides. Seasonal trends show a significant peak in March-May (early to late spring) for violent suicides. Increasing ambient temperature predicted increasing violent suicide rates.

CONCLUSIONS

We conclude that seasonality exists in violent but not nonviolent suicide rates. Our findings suggest that suicide is a heterogeneous phenomenon and violent suicide may be more influenced by biochemical and chronobiological mechanisms.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Lin HC
School of Health Care Administration, Taipei Medical University, Taipei, Taiwan. henry11111@tmu.edu.tw
Chen CS
No affiliation info available
Xirasagar S
No affiliation info available
Lee HC
No affiliation info available

MeSH

Cause of DeathClimateFemaleHumansIncidenceInternational Classification of DiseasesMaleMiddle AgedPopulation SurveillancePrevalenceSeasonsSuicideTaiwanViolence

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18451635

Citation

Lin, Herng-Ching, et al. "Seasonality and Climatic Associations With Violent and Nonviolent Suicide: a Population-based Study." Neuropsychobiology, vol. 57, no. 1-2, 2008, pp. 32-7.
Lin HC, Chen CS, Xirasagar S, et al. Seasonality and climatic associations with violent and nonviolent suicide: a population-based study. Neuropsychobiology. 2008;57(1-2):32-7.
Lin, H. C., Chen, C. S., Xirasagar, S., & Lee, H. C. (2008). Seasonality and climatic associations with violent and nonviolent suicide: a population-based study. Neuropsychobiology, 57(1-2), 32-7. https://doi.org/10.1159/000129664
Lin HC, et al. Seasonality and Climatic Associations With Violent and Nonviolent Suicide: a Population-based Study. Neuropsychobiology. 2008;57(1-2):32-7. PubMed PMID: 18451635.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Seasonality and climatic associations with violent and nonviolent suicide: a population-based study. AU - Lin,Herng-Ching, AU - Chen,Chin-Shyan, AU - Xirasagar,Sudha, AU - Lee,Hsin-Chien, Y1 - 2008/05/02/ PY - 2007/06/11/received PY - 2008/01/22/accepted PY - 2008/5/3/pubmed PY - 2008/9/4/medline PY - 2008/5/3/entrez SP - 32 EP - 7 JF - Neuropsychobiology JO - Neuropsychobiology VL - 57 IS - 1-2 N2 - BACKGROUND: Using 7-year population-based data on Taiwan, we examined seasonal variation in violent versus nonviolent suicide, and its association with meteorological factors: ambient temperature, relative humidity, atmospheric pressure, rainfall and daily sunshine hours. METHODS: We used Taiwan's nationwide mortality data from 1997 to 2003, categorizing the sample decedents into two groups, violent (ICD-9-CM codes E953-E958) and nonviolent (E950-E952) suicide, based on the suicide method used. Seasonal autoregressive integrated moving average (SARIMA) modeling was used to detect seasonality of suicide, and the association of climate variables with violent versus nonviolent suicide. RESULTS: The SARIMA test of seasonality was significant for both genders and the pooled sample (all p < 0.001) in violent suicide deaths, but not nonviolent suicides. Seasonal trends show a significant peak in March-May (early to late spring) for violent suicides. Increasing ambient temperature predicted increasing violent suicide rates. CONCLUSIONS: We conclude that seasonality exists in violent but not nonviolent suicide rates. Our findings suggest that suicide is a heterogeneous phenomenon and violent suicide may be more influenced by biochemical and chronobiological mechanisms. SN - 1423-0224 UR - https://www.unboundmedicine.com/medline/citation/18451635/Seasonality_and_climatic_associations_with_violent_and_nonviolent_suicide:_a_population_based_study_ DB - PRIME DP - Unbound Medicine ER -