• Yonsei medical journal · Jul 2017

    Effects of Paraquat Ban on Herbicide Poisoning-Related Mortality.

    • Dong Ryul Ko, Sung Phil Chung, Je Sung You, Soohyung Cho, Yongjin Park, Byeongjo Chun, Jeongmi Moon, Hyun Kim, KimYong HwanYHDepartment of Emergency Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea., Hyun Jin Kim, Kyung Woo Lee, SangChun Choi, Junseok Park, Jung Soo Park, Seung Whan Kim, Jeong Yeol Seo, Ha Young Park, Su Jin Kim, Hyunggoo Kang, Dae Young Hong, and Jung Hwa Hong.
    • Department of Emergency Medicine, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Korea.
    • Yonsei Med. J. 2017 Jul 1; 58 (4): 859866859-866.

    PurposeIn Korea, registration of paraquat-containing herbicides was canceled in November 2011, and sales thereof were completely banned in November 2012. We evaluated the effect of the paraquat ban on the epidemiology and mortality of herbicide-induced poisoning.Materials And MethodsThis retrospective study analyzed patients treated for herbicide poisoning at 17 emergency departments in South Korea between January 2010 and December 2014. The overall and paraquat mortality rates were compared pre- and post-ban. Factors associated with herbicide mortality were evaluated using logistic analysis. To determine if there were any changes in the mortality rates before and after the paraquat sales ban and the time point of any such significant changes in mortality, R software, version 3.0.3 (package, bcp) was used to perform a Bayesian change point analysis.ResultsWe enrolled 2257 patients treated for herbicide poisoning (paraquat=46.8%). The overall and paraquat poisoning mortality rates were 40.6% and 73.0%, respectively. The decreased paraquat poisoning mortality rate (before, 75% vs. after, 67%, p=0.014) might be associated with increased intentionality. The multivariable logistic analysis revealed the paraquat ban as an independent predictor that decreased herbicide poisoning mortality (p=0.035). There were two major change points in herbicide mortality rates, approximately 3 months after the initial paraquat ban and 1 year after complete sales ban.ConclusionThis study suggests that the paraquat ban decreased intentional herbicide ingestion and contributed to lowering herbicide poisoning-associated mortality. The change point analysis suggests a certain timeframe was required for the manifestation of regulatory measures outcomes.© Copyright: Yonsei University College of Medicine 2017

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