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Journal Article

Citation

Lin C, Yen TH, Juang YY, Lin JL, Lee SH. PLoS One 2014; 9(11): e112160.

Affiliation

Department of Psychiatry, Chang Gung Memorial Hospital, Linkou branch, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan.

Copyright

(Copyright © 2014, Public Library of Science)

DOI

10.1371/journal.pone.0112160

PMID

25386676

Abstract

BACKGROUND: Paraquat poisoning is a lethal method of suicide used around the world. Although restricting its accessibility had been widely discussed, the underlying psychopathological mechanism of paraquat self-poisoning and its association with mortality have not yet been explicitly evaluated.

METHODS: We included all patients admitted to a tertiary general hospital in Taiwan between 2000 and 2010 following a suicide attempt by paraquat self-administration. Diagnoses were made upon psychiatric consultation based on the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) criteria. The risk of mortality was calculated by logistic regression with various psychiatric or medical covariates.

RESULTS: The consultation-liaison psychiatry team assessed 157 patients who attempted suicide by paraquat poisoning. Mood disorders (54.0%), including dysthymic (26.7%) and major depressive disorders (24.7%), were the most common psychiatric diagnoses among the self-poisoning patients. Among those who attempted suicide, 87 patients (58.0%) died and dysthymic disorder (OR = 5.58, 95% CI: 1.13-27.69; p<0.05) significantly increased the mortality risk after adjustment for relevant medical variables, including age, gender, severity index of paraquat poisoning (SIPP), and risk for respiratory failure.

CONCLUSIONS: Awareness of comorbid psychiatric illnesses, especially dysthymic disorder, is vital in the prevention and treatment of suicide by paraquat poisoning.


Language: en

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