Suicide in services for mental health and substance use: A national hybrid registry surveillance system.

Suicide is strongly associated with mental health and substance use disorders, which makes mental health- and substance misuse services important areas for suicide prevention. The aim of The Norwegian Surveillance System for Suicide in Mental Health and Substance Use Services is to describe all suicide deaths in Norway that occur within one year after contact with mental health and substance misuse services. The study uses a hybrid registry case series design. It consists of a yearly linkage between the Norwegian Cause of Death Registry and the Norwegian Patient Registry, which is linked with a questionnaire. The linkage is conducted by using a cryptographic hash function of the deceased's personal id, thus ensuring that the project can link data across sources without the use of directly identifiable information. This indirect linkage ensures the deceased's confidentiality. Moreover, the The Norwegian Surveillance System for Suicide shows how administratively collected data can be harnessed and used for surveillance. Both use of hybrid registry designs and linkage through cryptographic hash functions might contribute to the development of health informatics as well as quality improvement in health care.

Suicide After Contact With Child and Adolescent Mental Health Services-A National Registry Study.

Background: Research has shown a strong association between suicide and mental disorders, and people in contact with services for mental health and substance use are known to be at high risk of suicide. Still, few studies have previously described suicide among young people in contact with Child and Adolescent Mental Health Services. Aim: The aim of this study is to examine the prevalence of contact and suicide rates by gender and age groups, and to describe patient demographics and service utilization in secondary mental health services. Methods: All young people in contact with Child and Adolescent Mental Health Services in the year prior to death in the period 2008-2018 were identified by linking the Norwegian Cause of Death Registry and the Norwegian Patient Registry. We estimated the prevalence of contact and suicide rates among those with and without contact, by gender and age groups. Characteristics of treatment contact were compared between boys and girls. Variables with significant differences were entered into a multivariate logistic regression model using gender as an outcome. Results: More girls (39.7%) than boys (11.8%) had contact with Child and Adolescent Mental Health Services in the year prior to death. Among girls, suicide rates per 100,000 patients increased linearly in the age groups 10-13, 14-16, and 17-19 years: 5, 22, and 38 per 100,000 patients, respectively. Among boys, the suicide rate increased sharply from 7 per 100,000 patients in the age group 14-16 years to 40 per 100,000 patients in the 17-19-year-old group. In the age-adjusted multivariate model, boys were 4.07 (1.22-14.44, p = 0.024) times more likely to have terminated contact at the time of death. Conclusion: This study shows gender differences in both suicide rates and service utilization among young people in contact with Child and Adolescent Mental Health Services before suicide, and future studies should focus on identifying the causes of these gender differences in service contact.

Suicide after contact with substance misuse services: a national registry study.

BACKGROUND: People with substance use disorders have a well-known increased risk for taking their own life. Previous research has mainly focused on suicide in mental health services, whereas there is limited knowledge regarding suicide after contact with substance misuse services. AIMS: The aim of the current study was to describe the utilisation of both mental health services and substance misuse services among people who have died by suicide within a year of contact with substance misuse services. METHOD: We used an explanatory observational design, where all suicide deaths in the period from 2009 to 2016 were retrieved from the Norwegian Cause of Death Registry and linked with the Norwegian Patient Registry. The people who had been in contact with substance misuse services within a year before their death were included in the sample (n = 419). The analysis was stratified by gender, and variables with significant differences between men and women were entered into a multivariate logistic regression model. RESULTS: More women (73.5%) than men (60.6%) had contact with mental health services in their last year (P = 0.01). In the adjusted logistic regression model, poisoning was more common among women (adjusted odds ratio (AOR) = 1.81, 95% CI 1.09-3.02) and women were more likely to be diagnosed with a sedative, hypnotic or anxiolytic use disorder (F14) in their last year (AOR = 2.77, 95% CI 1.37-5.68). CONCLUSIONS: This study highlights gender differences for suicide in substance misuse services, and the importance of collaboration and cooperation between substance misuse services and mental health services.