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Classifying undetermined poisoning deaths.

A E Donaldson1, G Y Larsen, L Fullerton-Gleason

  • 1Intermountain Injury Control Research Center, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT 84158-0289, USA. amy.donaldson@hsc.utah.edu

Injury Prevention : Journal of the International Society for Child and Adolescent Injury Prevention
|October 5, 2006
PubMed
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Poisoning deaths with undetermined intent are often suicides, indicating significant underreporting of suicide rates. This highlights the need for improved death investigation protocols to accurately classify these fatalities.

Area of Science:

  • Forensic Toxicology
  • Public Health
  • Epidemiology

Background:

  • Accurate classification of poisoning deaths is crucial for public health surveillance and prevention efforts.
  • Deaths of undetermined intent present a challenge in distinguishing between suicide and unintentional overdose.

Purpose of the Study:

  • To classify poisoning deaths of undetermined intent as either suicide or unintentional.
  • To estimate the extent of underreported poisoning suicides and unintentional poisonings.

Main Methods:

  • Utilized 2002 Utah death certificate and medical examiner data.
  • Employed bivariate analyses and Classification and Regression Tree (CART) analysis.
  • Developed a classification tree using known suicide and unintentional poisoning deaths to analyze undetermined cases.

Related Experiment Videos

Main Results:

  • Analysis included 41 unintentional, 87 suicide, and 84 undetermined poisonings.
  • CART analysis identified suicidal behavior, substance abuse, health problems, mood, and age as key discriminators.
  • Estimated underreporting: ~30% for poisoning suicides, 10% for overall suicides, and 61% for unintentional poisonings.

Conclusions:

  • Manner of death determination for poisonings involves subjective variables potentially missed by medical examiners.
  • Underreporting of suicide rates has significant implications for policy, research, and prevention program evaluation.