a Department of Public Health, College of Health Sciences, Kaohsiung Medical University , Kaohsiung , Taiwan.
b National Institute of Environmental Health Sciences, National Health Research Institute , Miaoli , Taiwan.
J Toxicol Environ Health A. 2019;82(10):638-644. doi: 10.1080/15287394.2019.1640980. Epub 2019 Jul 12.
Epidemiologic studies indicated that exposure to ambient air pollutants was associated with increased mortality rates attributed to suicide. The objective of this study was to investigate the potential relationship between ambient ozone (O) levels and daily number of hospital admissions for suicide attempts in Taipei for the period 2008-2012 using a time-stratified case-crossover analysis. In the single-pollutant model (without adjustment for other pollutants), the risk of committing a suicide attempt increased by 9% on warm days and 27% on cool days for each interquartile range (IQR) rise in O levels, respectively. The concentration of O was thus significantly associated with daily number of suicide attempts both on warm and cool days. In the two-pollutant models, O levels remained significant after the inclusion of other air pollutants (particulate matter (PM), PM, sulfur dioxide (SO), nitrogen dioxide (NO), and carbon monoxide (CO)) on cool days. However, on warm days, no significant correlation was found between O levels and reported daily number of suicide attempts. The relationship between O and suicide attempts appeared to be dependent upon temperature; however, the basis for these observations requires further investigation.
流行病学研究表明，暴露于环境空气污染物与自杀死亡率的增加有关。本研究旨在使用时间分层病例交叉分析，调查 2008-2012 年期间，台北市环境臭氧 (O) 水平与每日自杀未遂入院人数之间的潜在关系。在单污染物模型（未调整其他污染物）中，O 水平每升高一个四分位距 (IQR)，温暖日自杀未遂的风险分别增加 9%，凉爽日增加 27%。因此，O 浓度与温暖和凉爽日的每日自杀未遂人数均显著相关。在双污染物模型中，在凉爽日纳入其他空气污染物（颗粒物 (PM)、PM、二氧化硫 (SO)、二氧化氮 (NO) 和一氧化碳 (CO)）后，O 水平仍然显著。然而，在温暖日，O 水平与报告的每日自杀未遂人数之间没有发现显著相关性。O 与自杀未遂之间的关系似乎取决于温度；然而，这些观察结果的基础需要进一步调查。
