Suicide among the elderly in mainland China

Suicide in mainland China shows unique demographic patterns with age: the over-65 age group has the highest rate of completed suicide, reaching 44.3–200 per 100 000, which is four to five times higher than the Chinese general population. Rural suicide rates among the elderly are three to five times higher than the urban rates. The gender ratio of suicide in the elderly shows a reversal to those younger than 60 years of age in China. In addition, suicide methods and causes are different from those in Western countries. In the present paper, the profile of suicide among the elderly in China is delineated, including the prevalence, characteristics, underlying reasons and measures of preventing it.     

Suicide in Newfoundland and Labrador: a linkage study using medical examiner and vital statistics data.

OBJECTIVE: To examine suicide epidemiology in Newfoundland and Labrador from 1997 to 2001. METHOD: Data from the Office of the Chief Medical Examiner (CME) were linked with data derived from the Canadian Vital Statistics Death Database. Ninety-five percent confidence intervals (CI) were calculated to assess variation of rates. We used the chi-square test to compare categorical data. RESULTS: The CME recorded 225 suicide deaths, compared with 187 in the Canadian Vital Statistics Death Database. Most deaths not coded as suicide in the national database were coded as accidental. Using the CME data, the overall suicide rate was 9.5/100000, aged 10 years and older. The rate among males (15.8/100 000, 95% CI, 10.7 to 20.8) was almost 5 times that of females (3.3/100000; 95% CI, 1.0 to 5.5). Age-standardized rates decreased over the study period, from 10.9 to 8.0/100000; however, the difference was not significant. The proportionate mortality ratio for suicide deaths was highest among those aged 10 to 19 years (20.0%) and decreased with age. The suicide rate was highest among those aged 50 to 59 years. The rate for unpartnered individuals (17.0/100000, 95% CI, 10.7 to 23.0) was significantly higher, compared with partnered individuals (5.1/100000; 95%CI, 2.5 to 7.8). Males used more violent methods than females. Suicide was significantly higher in Labrador (27.7/100000, 95% CI, 18.4 to 37.0), an area with a higher Aboriginal population, compared with the island of Newfoundland (8.5/100000, 95% CI, 7.3 to 9.7). Psychiatric illness was the most common predisposing factor. CONCLUSIONS: Suicide deaths are highest among males, unpartnered individuals, and individuals with psychiatric disorders.     

Mortality and further suicidal behaviour after an index suicide attempt: a 10-year study

OBJECTIVE: To examine further suicide attempts and mortality in the 10 years after a suicide attempt requiring hospital admission. METHOD: Participants were a consecutive series of 3690 individuals admitted to Christchurch Hospital for attempted suicide during the 10-year period 1993-2002. Data were obtained on admissions to Christchurch Hospital for attempted suicide during the study period. Mortality subsequent to the index suicide attempt was established from the National Mortality Database. The influence of age, gender and method of index suicide attempt on mortality and further suicide attempts requiring hospitalization were examined. RESULTS: Within 10 years, 28.1% of those who had been admitted for an index suicide attempt were readmitted for a further non-fatal suicide attempt, and 4.6% died by suicide. Risks and rates of readmission were higher in: females; those under 55; and those whose index attempt involved a method of low lethality. Risks and rates of suicide were higher in: males; those aged 25 and over; and those using an index suicide attempt method of high lethality. Risks and rates of readmission and mortality from suicide were highest in the first 2 years after the index attempt, although deaths and readmissions occurred throughout the 10 years study period. CONCLUSIONS: Those making suicide attempts requiring hospital admission are at high risk of further hospitalization for suicide attempt and of death from suicide. These findings suggest a need for ongoing support and monitoring, and for enhanced treatment and management of all those making suicide attempts which require hospital admission in an effort to reduce risks of further suicidal behaviour.     

The suicide risk of discharged psychiatric patients

BACKGROUND: The suicide risk of psychiatric patients fluctuated along the course of their illness and was found to be high in the immediate post-discharge period in some settings. The epidemiology and psychiatric services for the suicide population in Hong Kong have differed from those of the West (i.e., low youth suicide rate, high elderly suicide rate, high female/male ratio, and heavily government-subsidized psychiatric service). This study examined the suicide rates within a year of discharge from psychiatric inpatient care in Hong Kong. METHOD: Discharges from all psychiatric hospitals or psychiatric wards in general hospitals in Hong Kong from 1997 through 1999 were followed up for suicides (ICD-9, E950-E959) and "undetermined" causes of deaths (E980-E989) by record linkage with the Coroner's Court until their deaths or Dec. 31, 2000. The suicide rates (/1000 person-years at risk) and standardized mortality ratios (SMRs; assigning a value of 1 to the same age- and sex-specific suicide rates in the general population) were calculated. RESULTS: 21,921 patients (aged over 15 years) were discharged from psychiatric hospitals from 1997 through 1999. Two hundred eighty patients committed suicide within 1 year of discharge; 85 suicides (30%) occurred within 28 days after discharge. The SMRs for suicide in the first 28 days after discharge were 178 (95% CI = 132 to 235) for females and 113 (95% CI = 86 to 147) for males. These rates were 4.0 (95% CI = 2.7 to 5.6) times higher for females and 4.6 (95% CI = 3.2 to 6.3) times higher for males than the rate in the rest of the year. Young adults had higher SMRs than the elderly. No specific diagnoses had higher suicidal risk than others. Calculations including undetermined causes of deaths (N = 53) gave similar results. CONCLUSION: The immediate post-discharge period carries a high risk of suicide for psychiatric patients. The high-risk groups are young adults and females. No diagnosis appears to carry a particularly high risk.     

Youth suicide trends in Australian metropolitan and non-metropolitan areas, 1988-1997

OBJECTIVE: The objective of this study was to examine trends in suicide among 15-34-year-olds living in Australian metropolitan and non-metropolitan areas between 1988 and 1997. METHOD: Suicide and population data were obtained from the Australian Bureau of Statistics. We calculated overall and method-specific suicide rates for 15-24 and 25-34-year-old males and females separately, according to area of residence defined as non-metropolitan (< or = 20,000 people) or metropolitan. RESULTS: Between 1988 and 1997 suicide rates in 15-24-year-old non-metropolitan males were consistently 50% higher than metropolitan 15-24-year-olds. In 1995-1997, for example, the rates were: 38.2 versus 25.1 per 100,000 respectively (p < 0.0001). The reverse pattern was seen in 25-34-year-old females with higher rates in metropolitan areas (7.5 per 100,000) compared with non-metropolitan areas (6.1 per 100,000, p = 0.21) in 1995-1997. There were no significant differences according to area of residence in 25-34-year-old males or 15-24-year-old females. Over the years studied we found no clear evidence that suicide rates increased to a greater extent in rural than urban areas. Rates of hanging suicide have approximately doubled in both sexes and age groups in both settings over this time. Despite an approximate halving in firearm suicide, rates remain 3-fold higher among nonmetropolitan residents. CONCLUSION: Non-metropolitan males aged 15-24 years have disproportionately higher rates of suicide than their metropolitan counterparts. Reasons for this require further investigation. Hanging is now the most favoured method of non-metropolitan suicide replacing firearms from 10 years ago. Although legislation may reduce method-specific suicide the potential for method-substitution means that overall rates may not fall. More comprehensive interventions are therefore required.     

Indigenous suicide in New Zealand.

This article describes patterns of suicide and attempted suicide among the indigenous (M?ori) population of New Zealand using official data from the New Zealand Health Information Service (NZHIS). The majority of M?ori suicides (75%) occurr in young people aged <35 years. Rates of suicide are higher among M?ori males and females aged <25 than in their non-M?ori peers. Rates of hospitalization for attempted suicides are higher amongst M?ori males aged 15-24, compared to non-M?ori. In contrast, suicide is virtually unknown amongst older M?ori (60 years). This article reviews explanations for the observed rates of suicide in M?ori, and examines approaches to effective intervention to reduce rates of suicide in young M?ori.     

A 10-year follow-up study on suicidal mortality after 1999 Taiwan earthquake

ObjectiveThe long-term impact of natural disasters on suicide in general population and survivors remains uncertain. The present report examined the direction and the length of the influence of an earthquake over suicide across age groups.MethodWe used an interrupted time-series design with non-equivalent no-treatment group to evaluate post-earthquake changes in suicide rates by the standardized mortality ratio.ResultsThe time trend changes in suicide rates before and after the earthquake were similar for males and females but different between senior and junior age groups. Gender-specific relative ratios were 0.85 (95%CI: 0.81–0.90) for males and 0.79 (95% CI: 0.72–0.86) for females. Age-gender-stratified relative ratios were 0.61 (95% CI: 0.53–0.70) and 0.69 (95% CI: 0.64–0.75) for males and females aged less than 45 years, respectively. Although the overall suicide mortality increased after the earthquake, the relative suicide risk ratio decreased 31–39% for those aged less than 45 years, which persisted for nearly 10 years after earthquake.ConclusionOur study demonstrated that a severe earthquake resulted in a significant decrease in standardized suicide mortality ratios in exposed areas for 10 years compared to unexposed area, particularly in a younger population.     

Trends in Suicide Mortality in Canada by Sex and Age Group, 1981 to 2017: A Population-Based Time Series Analysis: Tendances de la mortalité par suicide au Canada selon le sexe et le groupe d’âge, 1981 – 2017 : Une analyse de séries chronologiques dans la population

Objectives:Suicide is a complex global public health issue. The objective of this study was to assess time trends in suicide mortality in Canada by sex and age group.Methods:We extracted data from the Canadian Vital Statistics Death Database for all suicide deaths among individuals aged 10 years and older based on International Statistical Classification of Diseases and Related Health Problems, Ninth Revision (E950-959; 1981 to 1999) and International Statistical Classification of Diseases and Related Health Problems, 10th Revision (X60-X84, Y87·0; 2000 to 2017) for a 37-year period, from 1981 to 2017. We calculated annual age-standardized, sex-specific, and age group-specific suicide mortality rates, and used Joinpoint Regression for time trend analysis.Results:The age-standardized suicide mortality rate in Canada decreased by 24.0% from 1981 to 2017. From 1981 to 2007, there was a significant annual average decrease in the suicide rate by 1.1% (95% confidence interval, −1.3 to −0.9), followed by no significant change between 2007 and 2017. From 1981 to 2017 and from 1990 to 2017, females aged 10 to 24 and 45 to 64 years old, respectively, had a significant increase in suicide mortality rates. However, males had the highest suicide mortality rates in all years in the study; the average male-to-female ratio was 3.4:1.Conclusion:The 3-decade decline in suicide mortality rates in Canada paralleled the global trend in rate reductions. However, since 2008, the suicide rate in Canada was relatively unchanged. Although rates were consistently higher among males, we found significant rate increases among females in specific age groups. Suicide prevention efforts tailored for adult males and young and middle-aged females could help reduce the suicide mortality rate in Canada.     

Suicide in the Nordic countries.

There are great differences in the suicide rates in the closely related Nordic countries. The suicide rates are higher in Finland, especially in males, and Denmark, especially in females, and lower in Norway and Iceland, with Sweden in a middle position. The statistics are found to be comparable. In this article the development from 1880 to the present day is described, and special emphasis is laid on the development from 1960 onwards. Denmark and Finland still keep the top position, while the rise in suicide rates, especially in the age group 15-29 years, has been most marked in Norway. Within the Nordic region Greenland has an extremely high suicide rate, especially in youngsters, while the Faroe islands have a very low rate. Tentative explanations are given for the development of suicide rates in the Nordic countries.     

Suicide among older psychiatric inpatients: an evidence-based study of a high-risk group.

OBJECTIVE: Older adults have elevated suicide rates, especially in the presence of a psychiatric disorder, yet not much is known about predictors for suicide within this high-risk group. The current study examines the characteristics associated with suicide among older adults who are admitted to a psychiatric hospital. METHOD: All persons aged 60 and older living in Denmark who were hospitalized with psychiatric disorders during 1990-2000 were included in the study. Using a case-control design and logistic regression analysis, the authors calculated the suicide risk associated with specific patient characteristics. RESULTS: Affective disorders were found to be associated with an almost twofold higher risk of suicide among psychiatric inpatients than other types of disorders (95% confidence interval [CI]: 1.5-2.6). Patients with dementia had a significantly lower risk ratio of 0.2 (95% CI: 0.1-0.3). In combination with other types of disorder, affective disorders were found to modify an increased risk of suicide. First versus later admission for depression was a better predictor for suicide than age at first hospitalization for depression (before or after age 60 years). More than half of suicides occurred either within the first week of admission or discharge (chi(2) [1] = 27.70, p <0.001) compared with the distribution of patient days. CONCLUSIONS: Our findings underline the important role of affective disorder in combination with other types of disorders. Assessment of suicide risk among older psychiatric inpatients should take current or previous episodes of affective illness into consideration and pay special heed to the time shortly after admission and discharge.     

Suicide mortality gap between Francophones and Anglophones of Quebec, Canada

Purpose

Few studies evaluate language-group differences in suicide mortality. This study assessed the suicide mortality gap between Francophones and Anglophones of Quebec, Canada according to age, sex, method, region and socioeconomic deprivation.

Methods

Suicide decedents were extracted from the Quebec death file for 1989–2007 (N = 24,465). Age- and sex-specific suicide mortality rates were calculated for four periods (1989–1993, 1994–1998, 1999–2003, 2004–2007) for Francophones and Anglophones aged ≥10 years. Age-standardized rates of suicide by method, region, and level of social and material deprivation were calculated for each sex. Rate ratios and rate differences were estimated.

Results

Suicide rates for Francophones were two to three times higher than rates for Anglophones, and differences were greatest for adults aged 25–64 years. Francophone males had more than two times the rate of suicide by hanging or firearms than Anglophone males. Francophone females had twice the rate of hanging, poisoning or firearm suicide as Anglophone females, although precision was low. Francophone-Anglophone suicide mortality gaps were higher in urban areas despite lower suicide rates, and varied little across levels of social and material deprivation.

Conclusions

There was a large suicide mortality gap between Francophones and Anglophones of Quebec; especially, among adults aged 25–64 years.     

Suicide in Newfoundland and Labrador.

The present investigation was undertaken to explore the special factors associated with low suicide rates in Newfoundland and covered the ten year period of 1964 to 1973. The data were collected from death certificates. Comparisons were made with figures for Canada as a whole, as reported in the official statistics. Apart from a constant overall low rate of suicide in Newfoundland, women and young people (aged 15 to 29) failed to show an increase in the suicide rates such as has been observed in other parts of Canada and throughout the western world. In Newfoundland, age specific suicide rates, choice of method, variations in the rates for different religious denominations and seasonal variations in suicide rates were different from those observed elsewhere. Generally, suicide in Newfoundland shows a much older pattern and does not involve the new high-risk groups seen in more urbanized societies. Possible explanations for the special demographic characteristics of suicide in Newfoundland are offered, mainly on social, cultural and geographical grounds.     

Geography of suicide in Japan: spatial patterning and rural–urban differences

Purpose

There are notable geographic variations in incidence rates of suicide both in Japan and globally. Previous studies have found that rurality/urbanity shapes intra-regional differences in suicide mortality, and suicide risk associated with rurality can vary significantly by gender and age. This study aimed to examine spatial patterning of and rural–urban differences in suicide mortality by gender and age group across 1887 municipalities in Japan between 2009 and 2017.

Methods

Suicide data were obtained from suicide statistics of the Ministry of Health, Labour and Welfare in Japan. We estimated smoothed standardized mortality ratios for suicide for each of the municipalities and investigated associations with level of rurality/urbanity using Bayesian hierarchical models before and after adjusting for socioeconomic characteristics.

Results

The results of the multivariate analyses showed that, for males aged 0–39 and 40–59 years, rural residents tended to have a higher suicide risk compared to urban ones. For males aged 60+ years, a distinct rural–urban gradient in suicide risk was not observed. For females aged 0–39 years, a significant association between suicide risk and rurality was not observed, while for females aged 40–59 years and females aged 60 years or above, the association was a U-shaped curve.

Conclusion

Our results showed that geographical distribution of and rural–urban differences in suicide mortality in Japan differed substantially by gender and age. These findings suggest that it is important to take demographic factors into consideration when municipalities allocate resources for suicide prevention.

     

Gender differences in adolescents and young adults with suicidal behaviour.

OBJECTIVE: Gender differences in prevalence rates of suicide attempts and suicidal thoughts as well as in risk factors for suicide attempts such as traumatic events and mental disorders were investigated in a random sample of 3021 adolescents aged 14-24 years. METHOD: The M-CIDI (Composite International Diagnostic Interview) was used to survey suicidal behaviour, DSM-IV lifetime diagnoses and traumatic events. RESULTS: The female suicide attempters showed suicidal thoughts and suicide attempts significantly more often, and suicide attempts at a much younger age than the males. Furthermore, the females experienced sexual abuse much more often, and suffered significantly more often from anxiety disorders. The male suicide attempters showed higher rates of alcohol disorders and financial problems. CONCLUSION: A higher rate of anxiety in female suicide attempters results probably as a consequence of sexual abuse, which in turn makes them more vulnerable than males for attempting suicide between the age of 14-17.     

Cohort trends in youth suicide in Australia 1964-1997

OBJECTIVE: This paper examines trends in the rate of suicide among young Australians aged 15-24 years from 1964 to 1997 and presents an age-period-cohort analysis of these trends. METHOD: Study design consisted of an age-period-cohort analysis of suicide mortality in Australian youth aged between 15 and 24 for the years 1964-1997 inclusive. Data sources were Australian Bureau of Statistics data on: numbers of deaths due to suicide by gender and age at death; and population at risk in each of eight birth cohorts (1940-1944, 1945-1949, 1950-1954, 1955-1959, 1960-1964, 1965-1969, 1970-1974, and 1975-1979). Main outcome measures were population rates of deaths among males and females in each birth cohort attributed to suicide in each year 1964-1997. RESULTS: The rate of suicide deaths among Australian males aged 15-24 years increased from 8.7 per 100,000 in 1964 to 30.9 per 100,000 in 1997, with the rate among females changing little over the period, from 5.2 per 100,000 in 1964 to 7.1 per 100,000 in 1997. While the rate of deaths attributed to suicide increased over the birth cohorts, analyses revealed that these increases were largely due to period effects, with suicide twice as likely among those aged 15-24 years in 1985-1997 than between 1964 and 1969. CONCLUSIONS: The rate of youth suicide in Australia has increased since 1964, particularly among males. This increase can largely be attributed to period effects rather than to a cohort effect and has been paralleled by an increased rate of youth suicides internationally and by an increase in other psychosocial problems including psychiatric illness, criminal offending and substance use disorders.     

Suicide among young rural Australians 1964–1993: a comparison with metropolitan trends

The study tested hypotheses that from 1964 to 1993: (1) suicide rates among Australian 15- to 24-year-old males rose more sharply in rural than metropolitan areas; (2) firearm suicide rates among 15- to 24-year-old males, declining throughout Australia recently, rose continuously in rural, areas; (3) suicide rates among 15- to 24-year-old females did not change significantly in either metropolitan or rural areas. Suicides of those aged 10–24 years recorded by the Australian Bureau of Statistics (ABS) were classified according to the subject's residential grouping. Rates were calculated using ABS population data corresponding to these groupings. Results were analysed using log-linear analysis and chi-square statistics. The results supported the first two hypotheses, but not the third. Suicide rates for 15- to 24-year-old males rose by a factor of 2.2 in metropolitan areas, by 4-fold in towns with populations between 4,000 and 25,000 and by 12-fold in towns with populations less than 4,000. Male firearm suicide rates continued to rise in rural areas, and the greatest proportion of deaths in those locations were by firearms, though male hanging rates increased most in recent years in all locations. Female youth suicide rates did not change overall, but in towns with populations less than 4,000, they increased 4.5-fold. Possible explanations for this epidemic, which are mostly speculative and require confirmation, are discussed.     

Area factors and suicide: 5-year follow-up of the Northern Ireland population

BACKGROUND: Suicide rates vary markedly between areas but it is unclear whether this is due to differences in population composition or to contextual factors operating at an area level. AIMS: To determine if area factors are independently related to suicide risk after adjustment for individual and family characteristics. METHOD: A 5-year record linkage study was conducted of 1,116,748 non-institutionalised individuals aged 16-74 years, enumerated at the 2001 Northern Ireland census. RESULTS: The cohort experienced 566 suicides during follow-up. Suicide risks were lowest for women and for those who were married or cohabiting. Indicators of individual and household disadvantage and economic and health status at the time of the census were also strongly related to risk of suicide. The higher rates of suicide in the more deprived and socially fragmented areas disappeared after adjustment for individual and household factors. There was no significant relationship between population density and risk of suicide. CONCLUSIONS: Differences in rates of suicide between areas are predominantly due to population characteristics rather than to area-level factors, which suggests that policies targeted at area-level factors are unlikely to significantly influence suicides rates.     

The incidence of eating disorders in a Danish register study: Associations with suicide risk and mortality

Our aim was to characterize the incidence rates and cumulative incidence of anorexia nervosa (AN), bulimia nervosa (BN), and eating disorder not otherwise specified (EDNOS), and examine associations among eating disorder diagnoses, suicide attempts, and mortality. Individuals born in Denmark between 1989 and 2006 were included (N = 966,141, 51.3% male). Eating disorders diagnoses (AN, broad AN, BN, EDNOS) were drawn from the Danish Psychiatric Central Research Register (PCRR) and Danish National Patient Register (NPR). Suicide attempts and deaths were captured in the NPR, the PCRR, and the Danish Civil Registration System (CRS). In females, AN had a peak hazard at approximately age 15 years, BN at 22 years, and EDNOS had an extended peak that spanned 18 years–22 years. Eating disorder diagnoses predicted a significantly higher hazard for death and suicide attempt compared with the referent of individuals with no eating disorders. In males, peak hazard for diagnosis was earlier than in females. The present study represents one of the largest and longest studies of eating disorder incidence and suicide attempts and death in both females and males. Eating disorders are accompanied by increased hazard of suicide attempts and death even in young adults.     

The impact of psychiatric illness on suicide: differences by diagnosis of disorders and by sex and age of subjects

People with a psychiatric illness are at high risk for suicide; however, variation of the risk by patients’ sex and age and by specific diagnosis needs to be explored in a more detail. This large population study systematically assesses suicide incidence rate ratio (IRR) and population attributable risk (PAR) associated with various psychiatric disorders by comparing 21,169 suicides in Denmark over a 17-year period with sex-age-time-matched population controls. The study shows that suicide risk is significantly increased for persons with a hospitalized psychiatric disorder and the associated risk varies significantly by diagnosis and by sex and age of subjects. Further adjustment for personal socioeconomic differences eliminates the IRRs associated with various disorders only to a limited extend. Recurrent depression and borderline personality disorder increase suicide risk the strongest while dementia increases the risk the least for both males and females. The influence of various disorders generally weakens with increasing age; however, there are important exceptions. Schizophrenia affects people aged ≤35 years the strongest in terms of both IRR and PAR. Recurrent depression increases suicide risk particularly strong in all age groups and the associated PAR increases steadily with age. Borderline personality disorder has a strong effect in young people, especially those ≤35 years. Alcohol use disorder accounts the highest PAR of suicides in males of 36-60 years old. For the elderly above 60 years old, reaction to stress and adjustment disorder increases the risk for suicide the most in both sexes. These findings suggest that approaches to psychiatric suicide prevention should be varied according to diagnosis and sex and age of subjects.     

A comparison of Australian suicide rates in 1969-73 and 1976-80

Australian suicide rates were compared for the 1969-73 and 1976-80 periods by age, sex and State. Rates for males were generally at least twice those for females. The sex difference was marked, irrespective of age, State and time period. Middle-aged and older Australians generally had higher rates than 20-29-year-olds, although this finding was not consistent by State for males. The national age-standardised suicide rate for all age groups combined decreased between the 1969-73 period and 1976-80 both for males and (more so) for females. However, there was a 24% increase for 20-29-year-old males. While the suicide rate for 20-29-year-old females decreased between the 1969-73 period and 1976-80, an analysis of yearly trends within the 1976-80 period revealed an upward trend for individuals aged 20-29 years, for both females and males.