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Background Laws allowing assisted suicide and euthanasia have been implemented in many locations around the world but some individuals suffering with terminal illness receiving palliative care services are hastening death or die by suicide without assistance. This systematic review aims to summarise evidence of palliative care professionals’ experiences of patients who died by suicide or hastened death in areas where assisted dying is legal and to understand when hastened death is considered to be a suicide. Methods AMED, CINAHL Complete, PsycINFO, PubMED, and Academic Search Ultimate were searched for articles from inception through June 2018. Quality assessment used the Hawker framework. Results A total of 1518 titles were screened resulting in thirty studies meeting eligibility criteria for this review. Published studies about professionals’ experiences from areas with legalised assisted dying includes limited information about patients who hasten death outside legal guidelines, die by suicide without assistance, or if the law impacts suicide among palliative care patients. Conclusion There are a range of experiences and emotions professionals’ experience with patients who die by euthanasia, assisted suicide, or hasten death without assistance. The included literature suggests improved communication among professionals is needed but does not explicitly identify when a hastened death is deemed a suicide in areas where assisted dying is practiced. More research is needed to help clarify what hastened death means in a palliative care context and identify how and if assisted dying impacts issues of suicide in palliative care settings.

Suicide is a leading cause of death worldwide. Although research has made strides in better defining suicidal behaviors, there has been less focus on accurate measurement. Currently, the widespread use of self-report, single-item questions to assess suicide ideation, plans and attempts may contribute to measurement problems and misclassification. We examined the validity of single-item measurement and the potential for statistical errors. Over 1,500 participants completed an online survey containing single-item questions regarding a history of suicidal behaviors, followed by questions with more precise language, multiple response options and narrative responses to examine the validity of single-item questions. We also conducted simulations to test whether common statistical tests are robust against the degree of misclassification produced by the use of single-items. We found that 11.3% of participants that endorsed a single-item suicide attempt measure engaged in behavior that would not meet the standard definition of a suicide attempt. Similarly, 8.8% of those who endorsed a single-item measure of suicide ideation endorsed thoughts that would not meet standard definitions of suicide ideation. Statistical simulations revealed that this level of misclassification substantially decreases statistical power and increases the likelihood of false conclusions from statistical tests. Providing a wider range of response options for each item reduced the misclassification rate by approximately half. Overall, the use of single-item, self-report questions to assess the presence of suicidal behaviors leads to misclassification, increasing the likelihood of statistical decision errors. Improving the measurement of suicidal behaviors is critical to increase understanding and prevention of suicide.

Suicide and suicide attempts are significant issues for military, Veterans Affairs (VA), and civilian healthcare systems. The lack of uniform terms related to self-directed violence (SDV) has inhibited epidemiological surveillance efforts, limited the generalizability of empirical studies of suicide and non-lethal forms of SDV, and complicated the implementation of evidence-based assessment and treatment strategies for individuals with suicidal thoughts and/or behaviors. The Department of Veterans Affairs recently adopted the Centers for Disease Control and Prevention’s (CDC) SDV Classification System (SDVCS). This paper describes an implementation study of the SDVCS in two VA Medical Centers. The Veterans Integrated Service Network (VISN) 19 Mental Illness Research, Education and Clinical Center (MIRECC) training program for the SDVCS, including the SDVCS Clinical Tool (CT), will be discussed. Although preliminary data suggest that the CT and SDVCS are generally perceived as being acceptable and useful, further work will likely be required to facilitate widespread adoption. Potential next steps in this process are presented.

This 2005 Louis I. Dublin Award Address explores some of the basic difficulties and controversies inherent in the development and universal acceptance of a nomenclature for suicidology. Highlighted are some of the unresolved challenges with agreeing upon a mutually exclusive set of terms to describe suicidal thoughts, intentions, motivations, and self‐destructive behaviors.

Official suicide statistics for England are based on deaths given suicide verdicts and most cases given an open verdict following a coroner's inquest. Previous research indicates that some deaths given accidental verdicts are considered to be suicides by clinicians. Changes in coroners' use of different verdicts may bias suicide trend estimates. We investigated whether suicide trends may be over- or underestimated when they are based on deaths given suicide and open verdicts. Method Possible suicides assessed by 12 English coroners in 1990/91, 1998 and 2005 and assigned open, accident/misadventure or narrative verdicts were rated by three experienced suicide researchers according to the likelihood that they were suicides. Details of all suicide verdicts given by these coroners were also recorded. In 1990/91, 72.0% of researcher-defined suicides received a suicide verdict from the coroner, this decreased to 65.4% in 2005 (p trend < 0.01); equivalent figures for combined suicide and open verdicts were 95.4% (1990/91) and 86.7% (2005). Researcher-defined suicides with a verdict of accident/misadventure doubled over that period, from 4.6% to 9.1% (p < 0.01). Narrative verdict cases rose from zero in 1990/91 to 25 in 2005 (4.2% of researcher-defined suicides that year). In 1998 and 2005, 50.0% of the medicine poisoning deaths given accidental/misadventure verdicts were rated as suicide by the researchers. Between 1990/91 and 2005, the proportion of researcher-defined suicides given a suicide verdict by coroners decreased, largely due to an increased use of accident/misadventure verdicts, particularly for deaths involving poisoning. Consideration should be given to the inclusion of 'accidental' deaths by poisoning with medicines in the statistics available for monitoring suicides rates.

Mortality statistics are critical to determine the burden of disease. Certain causes of death are prone to being misclassified on cause of death certificates. This poses a serious risk for public health and safety, as accurate death certificates form the basis for mortality statistics, which in turn are crucial for research, funding allocation and health interventions. This study uses generalised estimating equations and regression modelling to investigate for which cause of death categories suicide and accident deaths are misclassified as. National mortality statistics and autopsy rates from North America and Europe covering the past forty years were analysed to determine the associations between the different causes of death in cross-sectional and longitudinal models. We find that suicides and deaths by accidents are frequently mutually misclassified. We also find that suicides are frequently misclassified as drug use disorder deaths, in contrast to accident deaths, which are not misclassified as drug use disorder deaths. Furthermore, suicides do not seem to be misclassified as undetermined deaths or ill-defined deaths. The frequency of misclassification shows that the quality of death certificates should be improved, and autopsies may be used systematically to control the quality of death certificates.

Suicidology finds itself confused and stagnated for lack of a standard nomenclature. This paper proposes a nomenclature for suicide‐related behavior in the hope of improving the clarity and precision of communications, advancing suicidological research and knowledge, and improving the efficacy of clinical interventions.

ObjectivesViolent deaths classified as undetermined intent (UD) are sometimes included in suicide counts. This study investigated age and sex differences, along with socioeconomic gradients in UD and suicide deaths in the province of Ontario between 1999 and 2012.MethodsWe used data from the Institute for Clinical Evaluative Sciences, which has linked vital statistics from the Office of the Registrar General Deaths register with Census data between 1999 and 2012. Socioeconomic status was operationalised through the four dimensions of the Ontario Marginalization Index. We computed age-specific and annual age-standardised mortality rates, and risk ratios to calculate risk gradients according to each of the four dimensions of marginalization.ResultsRates of UD-classified deaths were highest for men aged 45–64 years residing in the most materially deprived (7.9 per 100 000 population (95% CI 6.8 to 9.0)) and residentially unstable (8.1 (95% CI 7.1 to 9.1)) neighbourhoods. Similarly, suicide rates were highest among these same groups of men aged 45–64 living in the most materially deprived (28.2 (95% CI 26.1 to 30.3)) and residentially unstable (30.7 (95% CI 28.7 to 32.6)) neighbourhoods. Relative to methods of death, poisoning was the most frequently used method in UD cases (64%), while it represented the second most common method (27%) among suicides after hanging (40%).DiscussionThe similarities observed between both causes of death suggest that at least a proportion of UD deaths may be misclassified suicide cases. However, the discrepancies identified in this analysis seem to indicate that not all UD deaths are misclassified suicides.

Purpose To examine if widespread media reporting of the suicide of a young female singer by charcoal burning increased suicide rates, and to examine whether the suicide induced a high risk of imitation suicide by this method among the young female group. Methods Poisson time series autoregression model was applied to examine the relative risk of overall and subgroup (age, gender and method) suicides during the 2-week period after the initiation of media reporting of the celebrity suicide. Results We found a significant increase (adjusted relative risk = 1.17, p  = 0.04) in suicide deaths following media reporting of the celebrity suicide. The increase in suicides was particularly significant among female and young age groups. A marked increase in suicide by charcoal burning among females (adjusted relative risk = 1.44, p  < 0.0001) was further observed. Conclusions Detailed description of a specific suicide method following celebrity suicides may induce extensive modeling effect, attracting wider age/sex groups to model the method. Our finding provides further support for restraining media reporting of celebrity suicide in suicide prevention.

Objective To identify cause-of-death categories in which suicides might be misclassified in Taiwan. Methods We plotted secular trends (1971–2007) in sex- and method-specific rates of deaths classified as suicide, undetermined intent and accident for the Taiwanese population aged 15+ and compared the sex, age and marital status profiles of deaths in these three categories by method of death. Results The demographic profiles of registered suicides generally resembled those for deaths of undetermined intent and accidents by pesticide poisoning/suffocation but differed from those for accidents from non-pesticide poisoning/drowning/falling/poisoning by non-domestic gas. For the period 1990–2007, suicide rates based on suicides alone (14.8 per 100,000) would increase by 23, 7 and 1%, respectively, when including deaths of undetermined intent, accidental pesticide poisonings and accidental suffocations. Conclusions Suicide rates may be underestimated by more than 30% in Taiwan because some suicides are ‘hidden’ amongst deaths certified as due to other causes.