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This glossary defines terms used in data collection activities, analyses, and publications associated with the mortality component of the Drug Abuse Warning Network (DAWN).
Accident (Manner of death): "Accident" is a manner of death assigned by the medical examiner or coroner (ME/C) to deaths where there is little or no evidence that the injury or poisoning occurred with intent to harm or cause death and the fatal outcome was unintentional. For a death to be considered a DAWN case, the ME/C must have determined that the death was related to recent drug use. (See Manner of death and Drug-related death.)
Body systems: Refers to neurological, cardiovascular, gastrointestinal, genitourinary, respiratory, musculoskeletal, skin and soft tissue, lymphatic, endocrine, head and neck, abdominal, or multisystem conditions identified in the chain of events that led to the drug-related death. (See also Cause of death.)
Cause of death: The chain of events (diseases, injuries, or complications) that caused the death, as recorded on the death certificate or in other ME/C records. A death can have multiple causes. The immediate cause is listed first and is followed by contributing causes listed sequentially, ending with the underlying cause. Other significant conditions that contributed to the death are listed separately.
Coroner (C): Death investigation jurisdictions typically use either a medical examiner (ME) system or a coroner (C) system. Unlike MEs, coroners need not be physicians; usually, the only prerequisite for serving as a coroner is that the individual be more than 18 years of age and a resident of the county or district to be served. Coroners are typically elected rather than appointed. They may have jurisdiction over counties or districts within States. (See also Jurisdiction and Medical examiner.)
Could not be determined (Manner of death): "Could not be determined" is a manner of death assigned by the ME/C when the information pointing to one manner of death is no more compelling than one or more other competing manners of death when all available information is considered. For the death to be considered a DAWN case, the ME/C must have determined that the death was related to recent drug use. (See Manner of death and Drug-related death.)
Drug: A substance that is (1) used as a medication or in the preparation of medication; (2) an illicit substance that causes addiction, habituation, or a marked change in consciousness; or (3) both. Substances reportable to DAWN include alcohol, illicit drugs (e.g., club drugs, cocaine, heroin, marijuana, stimulants), nonpharmaceutical inhalants, prescription drugs (e.g., antibiotics, antidepressants, antipsychotics, anticoagulants, beta blockers, birth control pills, hormone replacement, insulin, muscle relaxants, pain relievers, sleeping aids), drugs used in treatment of medical conditions (e.g., respiratory therapy, chemotherapy, radiation therapy), vaccines, dietary supplements, vitamins, and other over-the-counter pharmaceutical products. DAWN publications use the term "drug" to refer to any of these substances. Multiple substances can be reported for each DAWN case. Therefore, the total number of drugs exceeds the total number of DAWN cases reported.
Drug category: A generic grouping of related pharmaceuticals or other substances reported to DAWN, based on the drug classification system developed by Multum Information Services, a subsidiary of the Cerner Corporation, and modified for use with DAWN. (More information on the Multum system is available at http://www.multum.com/Lexicon.htm). In general, the drug categories reflect the therapeutic uses for prescription and over-the-counter pharmaceuticals.
Additional clarification is provided for the following drug categories, as these are unique to DAWN:
Drug-related death: This category includes any death related to recent drug use and is the basis for the deaths reported in the annual DAWN mortality publications after 2005. To be a DAWN case, a drug needs only to be implicated in the death; the drug does not need to have caused the death. Even if only one drug is reported, it cannot be assumed that the substance was the sole and direct cause of the death. (See also Single-drug death.)
Additional clarification is provided in regard to classifying "Homicides" and "Suicides" as being drug-related:
Gamma hydroxybutyrate (GHB): This is a hallucinogen and depressant frequently combined with alcohol and other beverages. This drug is also used by bodybuilders to aid in fat reduction and muscle building. (For further information, see http://www.drugabuse.gov/infofacts/infofactsindex.html.)
Homicide (Manner of death): "Homicide" is a manner of death assigned by the ME/C to deaths that result from an injury or poisoning committed by another person with the intent to cause fear, harm, or death. (While quite common, intent to cause death is not required for classification as homicide.) For a death to be considered a DAWN case, the ME/C must have made the initial determination that the death was a homicide, and the means of death must be a drug(s). The drug(s) must be the direct cause of death or have hastened the death. This condition is an exception to the general DAWN rule that a drug need only have been related to the death. (See Manner of death and Drug-related death.)
Jurisdiction: DAWN uses the term "jurisdiction" to mean the geographic area for which an ME/C's office is responsible. The terms "death investigation jurisdiction," "jurisdiction," and "county" are used interchangeably because ME/Cs' offices are typically organized by county. In the few cases where there are multiple ME/Cs in a county, counts of deaths are aggregated and reported at the county level. For participating states, every county or jurisdiction within each state is included in DAWN. Some States are organized in single statewide jurisdictions. DAWN disaggregates state-level returns by county for the purpose of reporting data at the county and metropolitan levels.
Differences in death investigation procedures are often associated with whether the jurisdiction has a medical examiner (ME) system or a coroner (C) system. In addition, there are nearly always some differences in death investigation procedures across States. Differences in death investigation procedures limit the comparability of DAWN ME/C findings.
Lysergic acid diethylamide (LSD): This is a hallucinogen usually taken orally. (For further information, see http://www.drugabuse.gov/infofacts/infofactsindex.html.)
Manner of death: This classification is determined by the ME/C using the categories provided on the U.S. Standard Certificate of Death. "Manner of death" classifications reflect the presence or absence of intent to harm and the presence or absence of violence. Deaths are assigned to one of five categories by the ME/C based on the following criteria:1
(For additional detail on the criteria for determining if a death is a DAWN case, see Drug-related death and the individual Manner of death classifications.)
Medical examiner (ME): Death investigation jurisdictions typically use either a medical examiner (ME) system or a coroner (C) system. Most MEs are licensed physicians or forensic pathologists and are generally appointed (rather than elected). They may have jurisdiction over a county, district, or an entire State. (See also Coroner and Jurisdiction.)
Methylenedioxymethamphetamine (MDMA): This is a hallucinogen with stimulant effects, usually taken orally. (For further information, see http://www.drugabuse.gov/infofacts/infofactsindex.html.)
Metropolitan area: An area comprising a relatively large core city or cities and the adjacent geographic areas. Conceptually, these areas are integrated economic and social units with a large population center. Unless otherwise noted, metropolitan area analyses prepared by DAWN utilize the boundaries established by the Office of Management and Budget (OMB) in 2003 and updated annually thereafter.
Natural (Manner of death): "Natural" is a manner of death assigned by the ME/C to deaths that are due solely or nearly totally to disease and/or the aging process. For a death to be considered a DAWN case, there must be a drug(s) related to the death. (See Manner of death and Drug-related death.)
Phencyclidine (PCP): This is a hallucinogenic, white crystalline powder that is readily soluble in water or alcohol or may be snorted or smoked. (For further information, see http://www.drugabuse.gov/infofacts/infofactsindex.html.)
Place of death: The location that best describes where the death occurred. The place of death response categories are:
Race/ethnicity: OMB is responsible for standard protocols for the collection of data on race and ethnicity by federal systems. For data collections such as DAWN, where self-identification by the individual is not feasible, OMB protocol permits a combined format, whereby race and Hispanic ethnicity are recorded in a single data item that could still record multiple entries for race, Hispanic ethnicity, or both.
Since January 2003, DAWN has collected data on race/ethnicity using the combined format. For reporting, DAWN collapses the reported race/ethnicity information into four mutually exclusive categories, plus an unknown category, as follows:
Rate: A measure of the incidence of drug-related emergency department visits per 100,000 population. A rate can be calculated for the total population or for any subset defined by characteristics such as age and gender.
Single-drug death: A single-drug death is one in which only one drug was involved. The relation between the death and the drug need not be causal; the drug needs only to be implicated in the death. DAWN captures single-drug deaths involving alcohol if the decedent was younger than age 21.
Suicide (Manner of death): "Suicide" is a manner of death assigned by the ME/C to deaths that result from an injury or poisoning as a result of an intentional, self-inflicted act committed to do self-harm or cause the death of oneself. A suicide death that involves hanging, wrist slashing, shooting, jumping, and the like is considered to be a DAWN case if drugs were involved and documented as a contributing factor. Drug(s) do not need to be the immediate cause of death. (See Manner of death and Drug-related death.)
Toxic effects: Injury, illness, or damage that can be attributed to the ingestion of a drug. (See also Cause of death.)
DAWN mortality data are collected in participating medical examiner and coroner (ME/C) offices through a retrospective review of case records for every death investigated by the ME/C. Families are never interviewed. The review of source records is performed by a trained DAWN reporter in each participating facility. Depending on the needs of the facility, the DAWN reporter may be an employee of the death investigation jurisdiction or an employee of the DAWN operations contractor.
Within each facility that participates in DAWN, the designated DAWN reporter reviews all death records to identify deaths related to drug use. The DAWN reporter submits an electronic case report to the DAWN system for each death that meets the specific case selection criteria.
A DAWN case is any death related to recent drug use. DAWN includes deaths associated with substance abuse and misuse, both intentional and accidental. This also includes the use of drugs for legitimate therapeutic purposes. For a death to be considered a DAWN case, the relation between the death and the drug need not be causal; the drug needs only to be implicated in the death. Only recent drug use is included, and the reason that a patient used a drug is irrelevant.
The case criteria are intended to be broad and inclusive and to have few exceptions. Broad criteria take into account the fact that documentation in death records varies in clarity and comprehensiveness across ME/Cs. Broad criteria minimize the potential for judgments that could cause data to vary systematically and unexpectedly across reporters and jurisdictions. In addition, broad criteria are designed to capture a very diverse set of drug-related deaths, which can be aggregated and disaggregated to serve a variety of analytical purposes and the interests of multiple audiences.
There are some clearly delineated exceptions to the DAWN case criteria. A death is not a DAWN case if:
The information collected on DAWN deaths and suicide deaths falls into four general categories:
Depending on the data item, the DAWN data collection system, the electronic Medical Examiner Reporting System (eMERS), allows for entering categorical responses (including "Not documented" or "Could not be determined") and open-ended responses. Additional information on the data items collected by DAWN, particularly as may be pertinent to analysis, appears in the Glossary of Terms (Appendix B to this publication). Further details on the data items and how they are collected can be found in the DAWN Medical Examiner Reference Guide.2
DAWN covers a wide range of drugs and substances, including the following:3
In general, DAWN includes nonpharmaceutical substances that are consumed by inhalation, sniffing, or snorting and have a psychoactive effect when inhaled. There are two noteworthy exceptions: (1) deaths involving inhalation of carbon monoxide, and (2) deaths involving accidental inhalation of nonpharmaceuticals (e.g., exposure to paint fumes while painting a closet).
Several methods are used to improve the quality and reliability of DAWN data. These include:
ME/Cs participate in DAWN on a voluntary basis and constitute neither a sample nor a census of ME/Cs in the United States. ME/Cs are invited to join DAWN based on their location in selected metropolitan areas. Recruitment efforts focus primarily on areas where DAWN data are also collected from hospital emergency departments. In addition to recruitment targeted at metropolitan areas, DAWN has added States with centralized ME/C systems to gain a better understanding of drug-related mortality outside of the targeted metropolitan areas.
In this publication, the terms "death investigation jurisdiction," "jurisdiction," and "county" are used interchangeably because ME/Cs' offices are typically organized by county. In the few cases where there are multiple ME/Cs in a county, counts of deaths are aggregated and reported at the county level. For participating states, every county or jurisdiction within each state is included in DAWN.
The metropolitan area definitions used in this publication are those established in 2003 by the Office of Management and Budget (OMB) based on the 2000 U.S. Census and updated annually thereafter.4 OMB updates include the adding or dropping of metropolitan and micropolitan areas, name changes, and boundary changes. DAWN Area Mortality Reports reflect the areas, names, and boundaries that were current as of the end of the data collection year.
2 Substance Abuse and Mental Health Services Administration, Office of Applied Studies. (2006). DAWN Medical Examiner Reference Guide. (Available at http://dawninfo.samhsa.gov/files/collect_2006-2008/me_reference_guide_2006-2008.pdf.)
3 The classification of drugs used in DAWN is derived from the Multum Lexicon, © 2010 Lexi-Comp, Inc. and/or Cerner Multum, Inc. The classification was modified to meet DAWN's unique requirements (2010). The Multum Licensing Agreement governing use of the Lexicon can be found in Appendix A and on the Internet at http://dawninfo.samhsa.gov/drug_vocab.
4 Office of Management and Budget (OMB), Revised Definitions of Metropolitan Statistical Areas, New Definitions of Micropolitan Statistical Areas and Combined Statistical Areas, and Guidance on Uses of the Statistical Definitions of These Areas, Bulletin No. 03-04, June 6, 2003. (Available at http://www.whitehouse.gov/omb/bulletins/b03-04.html.) Updates describing new metropolitan or micropolitan areas and changes to existing area are provided annually by OMB. (Available at http://www.whitehouse.gov/omb/bulletins_default.)