Operational criteria for the determination of suicide

Suicide is an important public health problem for which we have an inadequate public health database. In the United States, decisions about whether deaths are listed as suicides on death certificates are usually made by a coroner or medical examiner. These certification decisions are frequently marked by a lack of consistency and clarity, and laws and procedures for guiding these decisions vary from state to state and even from county to county. Without explicit criteria to aid in this decision making, coroners or medical examiners may be more susceptible to pressures from families or communities not to certify specific deaths as suicide. In addition, coroners or medical examiners may certify similar deaths differently at different times. The degree to which suicides may be underreported or misclassified is unknown. This makes it impossible to estimate accurately the number of deaths by suicide, to identify risk factors, or to plan and evaluate preventive interventions. To remedy these problems, a working group representing coroners, medical examiners, statisticians, and public health agencies developed operational criteria to assist in the determination of suicide. These criteria are based on a definition of suicide as "death arising from an act inflicted upon oneself with the intent to kill oneself." The purpose of these criteria is to improve the validity and reliability of suicide statistics by: (1) promoting consistent and uniform classifications; (2) making the criteria for decision making in death certification explicit; (3) increasing the amount of information used in decision making; (4) aiding certifiers in exercising their professional judgment; and (5) establishing common standards of practice for the determination of suicide.     

Cause-of-death query in validation of death certification by expert panel; effects on mortality statistics in Finland, 1995

The correctness of selection, coding and registration of underlying cause-of-death is important for the quality of mortality statistics. One measure to improve quality is the query to the certifier for verification of the underlying cause-of-death. In Finland, 3478 death certificates, 7.1% of total 49074 certifications in 1995, were considered questionable by statisticians. The expert panel at Statistics Finland was able to resolve 2813 (80.9%) of them. However, 665 (19.1%) certificates needed to be further queried from the certifier. Of these, 318 (47.8%) were re-assigned to another ICD-9 category or to the applicable three-digit category within the main category of heart and vascular diseases, resulting in changes from a 17.00-fold increase in rheumatic heart diseases (ICD-9 codes 390-398) to a decrease of about one-half (0.45-fold change) in unspecified neoplasms (codes 235-239). However, a statistically significant impact on national mortality statistics was not observed in any of applied ICD categories. Among all questionable death certificates, most prone to query of the certifier, and with a statistical significance of P<0.05, were those with no cause-of-death specified, those stating underlying cause-of-death as non-specified neoplasms (with a observed/expected ratio, O/E, of 1.69), and heart and vascular diseases (1.45), with its subcategories of ischaemic heart diseases (1.33) and other heart diseases (2.92). Death certificate validation, by expert panel consultations and query to the certifiers, and the importance of estimation of the validity of cause-of-death information on death certificates are strongly pointed out in a continuous strive for correct and reliable mortality statistics.     

Heat-related mortality in selected United States cities, summer 1999.

As part of a public health response to severe heat waves in the midwestern and northeastern United States in the summer of 1999, the authors actively solicited the number of heat-related deaths from 38 medical examiner and coroner jurisdictions comprising 35 metropolitan areas to enumerate heat-related deaths in areas affected by heat waves. They also determined the usefulness of these data for surveillance and rapid investigation of heat-related deaths. A total of 334 heat-related deaths were reported during the study period of July 1 - August 31. Minor changes in data collection and diagnostic criteria in some medical examiner and coroner jurisdictions would allow for greater comparability among jurisdictions. The National Association of Medical Examiners' position paper on heat-related mortality diagnosis provides important guidance to medical examiners and coroners regarding the certification of heat-related deaths and may require some refinement to address certain issues. Among these are certifying manner of death and classifying potential causes of heat-related death not involving hyperthermia or heat stroke, but where heat is a potential contributing factor to death. Medical examiners and coroners are an important resource for heat-related mortality research, and improvements in data collection and reporting could yield tremendous benefits to our understanding of and interventions for heat-related deaths.     

Medical examiner/coroner records: uses and limitations in occupational injury epidemiologic research

Epidemiologic research often relies on existing data, collected for nonepidemiologic reasons, to support studies. Data are obtained from hospital records, police reports, labor reports, death certificates, or other sources. Medical examiner/coroner records are, however, not often used in epidemiologic studies. The National Institute for Occupational Safety and Health's Division of Safety Research has begun using these records in its research program on work-related trauma. Because medical examiners and coroners have the legal authority and responsibility to investigate all externally caused deaths, these records can be used in surveillance of these deaths. Another use of these records is to validate cases identified by other case ascertainment methods, such as death certificates. Using medical examiner/coroner records also allows rapid identification of work-related deaths without waiting several years for mortality data from state offices of vital statistics. Finally, the records are an invaluable data source since they contain detailed information on the nature of the injury, external cause of death, and results of toxicologic testing, which is often not available from other sources. This paper illustrates some of the ways that medical examiner/coroner records are a valuable source of information for epidemiologic studies and makes recommendations to improve their usefulness.     

The conversion of coroner systems to medical examiner systems in the United States: a lull in the action

Coroner and medical examiner systems in the United States conduct death investigations for most deaths that are sudden and unexplained, or which involve external causes such as injury and poisoning. They play a very important role in the criminal justice, public health, public safety, and medical communities, and they also contribute a substantial portion of autopsy-based mortality data to the state and federal mortality statistics systems. Death investigations often involve complex medical issues and necessarily require the involvement of appropriately trained physicians. Over the years, there has been a trend to replace the elected lay coroner systems with systems run by appointed, physician medical examiners. Presently, about 31% of counties in the United States are served by a medical examiners at the county, district, or state level. Between 1960 and 1989, there was considerable conversion to medical examiner systems, but this trend slowed in the 1990s. Since 2000, only 6 counties in the United States have converted to a medical examiner system, no states have converted since 1996, and 1 county has reverted to a sheriff-coroner system. Possible reasons for this decline are discussed, including legislative, political, geographical, financial, population-based, and physician manpower distribution factors. It is important to ensure that all death investigation systems have appropriate access to medically educated and trained physicians such as forensic pathologists.     

The validity of death certificates: routine validation of death certification and its effects on mortality statistics

The 3478 death certificates (7.1% of all annual death certificates) of this study comprise those national death certificates in 1995 submitted for validation to the panel representing both medical and nosological expertise. As such, it is highly selected and represents, from the nosological point of view, the most inconsistently filled-in portion of Finnish death certificates. The routine validation procedure is essentially based on exploitation of the extra medical information, i.e. the case history, on the Finnish death certificate form. Altogether, 2813 (80.9%) out of 3478 certificates could be adjusted at the primary panel session; the rest required further clarification. The re-assignment of cause of death by the panel and the impact of panel adjustments on the national mortality statistics is assessed here by comparing the initial death certification and the finally registered underlying cause of death grouped into ICD-9 major categories with special reference to the subcategories of neoplasm, cardiovascular disease (HVD) and unnatural death. A statistically significant decline (p<0.0001) in deaths, both in the category of symptoms, signs and ill-defined conditions and in the pulmonary circulation disease subcategory of HVD with 37.6 and 35.1%, respectively, was observed. The decrease of 11.1% in the benign or NUD neoplasm subcategory and the increase of 8.6 and 7.0% in the categories of endocrine disease, and musculo-skeletal and connective tissue disease, respectively, are essential observations as to the quality of the cause of death register. The effect on the HVD major category was practically nil. At the HVD-subcategorial level, a decrease of 14.0% for diseases of the veins and lymphatics and other circulatory diseases and an increase of 3.5% for hypertensive diseases (HYP) were the two next most obvious alterations to the diseases of the pulmonary circulation, but were without statistical significance. For ischaemic heart disease and other subcategories, the effects were minor. The unnatural deaths as a whole increased in the final statistics with only 0.9%. In the study data, categorial changes ranged from the decrease of 75.2% for symptoms, signs and ill-defined conditions to the increase of 77.3% for endocrine diseases. In conclusion, the Finnish death certificate form, death certification practices and cause of death validation procedure seem to serve the coding of causes of death for mortality statistics appropriately. The results of the study form a relevant reference background to evaluation of epidemiological studies on mortality.     

Death certificates, natural death, and alcohol. The problem of underreporting

Previous studies have identified an apparent underreporting of alcohol-related natural deaths on death certificates. This survey consists of a review of death certificates in one urban county, and provides further evidence that alcohol-caused natural deaths are underreported by physicians who sign death certificates.     

Sudden infant death syndrome: diagnostic practices and investigative policies, 2004

Using a 2004 population-based survey of all US medical examiner and coroner offices, we examined the characteristics of offices accepting an infant death case and calculated the percentage of offices that had death scene investigation or autopsy policies for the investigation of sudden unexpected infant death (SUID). We also calculated the percentage of offices that used and did not use sudden infant death syndrome (SIDS) as a cause of death, and we compared differences in characteristics among those offices.Of medical examiner and coroner offices, 52% did not report an infant death in 2004. Of the 7957 infant deaths reported, 43% occurred in jurisdictions that experienced 1 or 2 infant deaths. Of the offices that used SIDS as a classification, 34% did not have policies for conducting death scene investigations and autopsies for SUID. At least 5% of offices that reported an infant death did not use SIDS as a cause of death classification. These findings have important implications for understanding recent trends in SIDS and SUID. Supporting the implementation of national standards for investigating and certifying infant deaths could provide guidelines for consistent practices in medical examiner and coroner offices.     

Certifying Death in the United States

Accurately identifying death and its causes is integral to the compilation of mortality data and ultimately to the operation of the criminal justice and public health systems. A clear understanding of who is in charge of such processes is paramount to establishing the quality, or lack thereof, of the information provided in death certificates. Our study provides a comprehensive overview of all state statutes identifying death investigators charged with classifying and certifying death in the United States. We found that state statutes designate a broad range of individuals as responsible for the classification and certification of death. Those vary by state and set of circumstances and can include medical examiners, coroners, pathologists, other physicians, registered nurses, and more. Our findings highlight the important need for a unified standard of qualifications in the medico‐legal system, as well as, regulatory reform at the state level regarding who can complete and sign death certificates.     

Initiation of formal death investigation procedures among the Northern Plains Indians: a necessary adjunct in the study of American Indian sudden infant deaths

The high rate of infant mortality among native peoples in the Aberdeen Service Area of the Indian Health Service (primarily North and South Dakota) prompted a multi-institutional study of this problem. The study investigators assumed that local coroners or medical examiners would be able to perform suitable death scene investigations. However, during the design portion of the study it became apparent that, with one exception, none of the participating Indian Nations had a death investigator or even a legal mandate to provide death investigation. To allow the study to go forward, and ultimately to better the community health within its service area, the Aberdeen Area Indian Health Service submitted a draft enabling coroner legislation/resolutions to the area tribes. By November of 1996, 6 of the 19 Indian Nations enacted enabling coroner legislation. To facilitate both the study and general death investigation within the area, the Aberdeen Area Indian Health Service since 1993 has held five 2-day death investigation training programs covering a variety of death investigation topics which were attended by 68 participants. Without further recognition of the need for tribal death investigation and additional funding, these gains in tribal death investigation will probably be transitory.     

Mind your manners: quality of manner of death certification among medical examiners and coroners in Taiwan

To assess the quality of manner of death (MOD) certification among medical examiners/coroners (ME/Cs) in Taiwan, death certificates issued in 2002 for which the final MOD was suicide or undetermined were extracted for analysis. Indicators of the quality of MOD certification included (1) MOD not given by the ME/Cs; (2) MOD assigned by the ME/Cs was changed by the coder; (3) ratio between undetermined and suicide deaths (U/S ratio). There were 450 death certificates for which the ME/Cs did not assign the MOD in the original certificate. Three fifths (285/450) of them were issued by 4 ME/Cs. The same 4 ME/Cs also had extremely high U/S ratios (1.25-1.84) compared with the average (0.31). The overall quality of MOD certification among ME/Cs in Taiwan was fair; only a small number of ME/Cs had poor quality in MOD certification. The high U/S ratio among the 4 ME/Cs would certainly affect the suicide mortality rates of the counties the 4 ME/Cs were in charge of. Actions should be taken to improve the certification quality of these 4 ME/Cs.     

Quality assurance review of death certificates: a pilot study

BACKGROUND: Although quality assurance programs for medical examiners are required by the National Association of Medical Examiners' Inspection and Accreditation Checklist, quality assurance programs specifically targeting death certificate completion have not been addressed. The Fulton County Medical Examiner, Atlanta, GA, has implemented a pilot quality assurance program for death certificate information, and this report contains information about 1 year's experience with the program. METHODS: All death certificates are reviewed by the case medical examiner(s) and chief medical examiner prior to their release to funeral homes. Death certificates with errors are retained for quality assurance and review purposes, and needed corrections are made before death certificates are released. During a 1-year period, death certificates with errors were collected and then reviewed and tabulated by type of error. RESULTS: Between May 26, 2003, and May 25, 2004, the Fulton County Medical Examiner certified 1267 deaths. Of these, 47 (4%) were found to contain errors that were corrected and an additional 52 (4%) had been amended for various reasons. The most common errors were misspellings in causes of death or poor or incomplete wording in injury-related information. Forty-seven percent of errors involved omitted, incomplete, or incorrect information that was potentially significant. The most common reason for amended certificates was unexpected detection of acute intoxications among people with significant cardiovascular disease. CONCLUSIONS: Quality assurance review of death certificates can assist in preventing the release of death certificates with incomplete, erroneous, or omitted information and may also be useful as an educational forum regarding completion of the death certificate.     

Accurately assessing elderly fall deaths using hospital discharge and vital statistics data

Historically, fatal injury monitoring and surveillance have relied on mortality data derived from death certificates (DC). However, problems associated with utilizing DC have been well documented. Recently, access to and utilization of hospital discharge data (HDD) have offered a new and important secondary source of data regarding in-hospital deaths. However, studies have shown that discrepancies between the HDD and the corresponding DC often exist. This discrepancy was especially evident when comparing HDD to the vital statistics data (VSD) for deaths by falls among those aged 65 and over in 19 states.This was a retrospective forensic review of elderly (age 65 and over) fall-associated fatalities (E880-E888) identified from HDD and VSD in Allegheny County, Pennsylvania, between 1997 and 1998. Seventy-seven cases were identified, with the original manner of death listed as natural (34), suicide (1), and accidental (42) on the DC. Following a forensic review of the cases, the manner of the death on the DC should have been changed from natural to accidental in 28% (n = 12) of the cases, representing an undercount in the VSD. Undercounts were due to a failure of clinicians to account for the significance of a fall event that contributed to subsequent pathology and death. In addition, in that 22% (n = 17) of the HDD fall-associated deaths, the fall did not contribute directly or sequentially to the underlying cause of death, thereby representing an overcount in the HDD.Based on these findings we recommend (1) elderly fall surveillance systems should only count HDD E-coded falls that demonstrate a serious traumatic injury which directly or subsequently results in death, (2) all in-hospital fall-associated deaths should be reported to and reviewed by coroner/Medical Examiner offices for determination of the cause and manner of death, and (3) physicians should be better educated in properly completing death certificates.     

Use of "therapeutic complication" as a manner of death

Analyses of deaths due to therapeutic complications (TCs) provide important quality of care information for medical providers. In New York City, 463 deaths were investigated by the Office of Chief Medical Examiner and certified with TC as the manner of death in 2003. The TC manner of death is used for fatalities due to predictable complications of appropriate medical therapy. All death certificates and select autopsy, hospital, and investigation reports were reviewed. Data concerning cause of death, contributing conditions, age, race, and sex were extracted. The types of complications and the causes of death were classified into various types of surgical and nonsurgical categories of complications. These included: postoperative infections, pulmonary emboli, and technical and medication complications. The use of TC as a manner of death has benefits and limitations. Without the TC option, one is forced to certify certain deaths (e.g., penicillin anaphylaxis) either as natural or accident. The TC option allows easy identification and tracking of medical complications for public health purposes and also allows more consistent reporting of natural and medical-accidental deaths. In general, complications that occur during emergency surgeries/procedures for natural disease, tend to be certified with a natural manner. The "but for" test may be used to distinguish natural from TC deaths. There are criteria for distinguishing TC from accidents and homicides. TCs that occur during treatment of a potentially life-threatening injury, are superseded by the manner dictated by the circumstances of the initiating injury. The certification of TC usually does not address errors of omission, clinical judgement/management, or missed diagnoses.     

Accuracy of cause of death determination without forensic autopsy examination

Medical examiners and coroners commonly determine cause and manner of death without an autopsy examination. Some death certificates generated in this way may not state the correct cause and manner of death. From the case files of the Department of Forensic Medicine in Sydney, Australia, the authors retrospectively reviewed investigative information of all cases in a 6-month period that were initially considered natural deaths (429). The authors, blinded to autopsy results, accepted 261 cases as appropriate for certification without autopsy and assigned a cause of death to each. Per standard local practice, all cases had been autopsied. The actual causes of death as determined by autopsy were then revealed and compared with the presumed causes of death. Most presumed and actual causes of death were cardiovascular (94% and 80%, respectively). The majority of presumed causes of death were listed as ASCVD as the cases lacked features of a more specific cardiovascular process. A large majority of cases had a presumed cause of death of ischemic heart disease based on individual case details. The actual causes of death demonstrated a large breadth of cardiovascular and noncardiovascular disease processes, even though ischemic heart disease accounted for 62% of deaths. The presumed cause of death was completely wrong in 28% of cases. A nonnatural manner of death was present in 3% of cases. This study demonstrates that experienced forensic pathologists may generate erroneous death certificates for cases that are not autopsied.     

Exploitation of autopsy in determining natural cause of death: Trends in Finland with special reference to the diagnostics of ischemic heart diseases and cerebrovascular diseases in middle-aged males, 1974–1993

Finnish mortality statistics show a marked decrease in coronary disease mortality especially among middle-aged males during the last 20 to 25 years. At the same time, the overall autopsy rate in deaths due to natural, non-violent causes has diminished in Finland. National mortality statistics are based on medical information given in death certificates. How often are the causes of death based on autopsy and is there any definitive trend? Possible changes in cause-of-death determination practices may have contributed to the mortality changes observed. In this study, deaths due to ischemic heart diseases (IHD) and cerebrovascular diseases (CVD) from 1974 to 1993 in Finland were compared with natural deaths, i.e. all of the deaths due to natural causes, in regard to use of autopsy. It was found that IHD-diagnosis as the underlying cause-of-death was, unlike natural deaths and CVD in particular, increasingly based on autopsy. It is thus concluded that the recent decline in coronary disease mortality among middle-aged men in Finland cannot be explained by any deterioration in cause-of-death examination practices.     

Nonnatural death masquerading as SIDS (sudden infant death syndrome)

This article relates our experiences with accidental and homicidal deaths in reported sudden infant death syndrome (SIDS) cases. Our intent is to alert personnel in medical and health-related professions as well as death investigators (coroners, law enforcement officials, etc.) that a thorough scene investigation and history need to be obtained when a child's death has been reported, since this may modify the type of autopsy to be performed. It should not be assumed that all children less than 1 year of age who die suddenly die from SIDS.     

Death certification of "suicide by cop"

Death certification of "suicide by cop" is controversial among some medical examiners and coroners. We present five such deaths that were certified as suicides and discuss the medico-legal issues involved with these certifications. To certify such a death as a suicide, certain criteria should be met. Suicide by cop is a circumstance that involves competing intentional acts that may result in dichotomous determinations of the manner of death. Despite the absence of direct self-infliction, there is overwhelming evidence that these five individuals intended to end their own lives. Their use of an unusual method to accomplish this goal may inappropriately result in a reflexive certification of homicide. All of the decedents possessed weapons or a facsimile of a weapon. We present five instances of suicide by cop and contend that these types of deaths are best certified as suicides.     

Errors on death certificates requiring amendments: the Broward County experience

The medical examiner's office in Broward County is responsible for determining the cause and manner of death in cases falling under its jurisdiction and issuing death certificates on these decedents. Amendments are occasionally required to correct misinformation on death certificates or within the autopsy reports. The purpose of this study was to investigate the major causes for the amendments and to develop strategies to avoid future errors. We found 128 cases from 2006 to 2007 that required amendments; 103 contained sufficient data in the file for further analysis. Over this time period, 3790 death certificates were issued over that same period, resulting in a 3.37% amendment rate. In this study, the cohort included both males and females with a ratio of 2:1. Their ages ranged from newborn to 103 years, with a mean age of 49 years. Of the 103 amended cases, amendments were made to the cause (n = 30) and often the manner (n = 21) of death listed on the death certificate; the remaining changes were limited to the autopsy report. The most common reasons for amendments included reception of delayed laboratory findings (35%), acquisition of additional medical history (22.5%), and typographic errors (15.5%). Typographic errors mainly occurred because of inaccuracies in the names originally provided to our office, the use of aliases by decedents, incorrect personal/demographic history, or various misspellings by funeral homes or medical examiner staff. The most significant reclassifications involved changing certified natural deaths to accidental overdoses and vice versa, based on toxicological analysis. Because of delays in specimen turnaround, these amendments often were made months after the original death certificate was issued. STAT urine drug screening has been helpful in reducing the number of amendments made, but certain drugs of significance are missed by rapid screens. Given that our office performed complete toxicological analysis on all cases over this period, it seems likely that we detected several overdoses that would have been missed if natural deaths were not routinely screened for potential toxins.     

Validation of diagnoses on death certificates for male alcoholics in Stockholm

The mortality and the causes of death have been studied in a cohort consisting of 1548 male alcoholics in Stockholm. During the period 1969-1981 there were 542 cases of death in this population. The mortality rates were triple those for males in Stockholm generally. Using the official causes of death there was a highly significant excess mortality in the following diagnostic groups: Cancer in the upper digestive region, primary hepatic cancer, cirrhosis in the liver, pancreatitis, pneumonia, alcoholism and alcoholic poisoning, suicides and other causes of violent death as well as ischemic heart disease. The underlying and contributing causes of death on the death certificates were reclassified according to ICD-rules using clinical records and autopsy protocols. It was found that the underlying cause of death was incorrect in 21.8% of the cases. Important information was withheld in further 19.8%. After validation there was no longer any excess mortality in ischemic heart disease. The number of alcohol-related diagnoses, i.e. alcoholic cardiomyopathy, cirrhosis and fatty liver with alcoholism and alcoholic intoxication, was much greater. It is concluded that there is a underreporting of alcohol-related diseases and injuries which has a great influence on the reliability of death statistics.