Aims: Involvement in minor drug offences at an early age can be a signal of the onset of a potential drug issue. This is why Sweden has considered the criminalization of personal use as a strategy to deter the progression of drug use. This study investigated how the judiciary and social services succeed in identifying and providing support to adolescents convicted of drug offences. Methods: Characteristics of all 15–17-year-olds convicted of offences against the Act on Penal Law on Narcotics (drug offence) in 2017 were examined using Swedish longitudinal registry data (N = 1847). Furthermore, the decision process rendering different legal responses was examined by use of social services files for a subsample of 189 adolescents. Results: About two-thirds of the adolescents had their first conviction for the index offence and the majority received legal responses consisting of rehabilitative measures. Background factors indicated that those with severe drug and criminal issues encounter risk factors relating to their upbringing (e.g., neuropsychiatric disorders were notably more prevalent in this group than among similar peers). Around 61% of adolescents were reconvicted for new drug offences during the three-year study period, but with variations among subgroups. Younger boys who received rehabilitative measures had lower reconviction rates compared to those without. Conclusions: Addressing the underlying factors contributing to adolescent drug offences requires a multifaceted approach that prioritizes early intervention, personalized support, and collaboration across systems to promote positive outcomes and reduce recidivism rates.

Evidence from Swedish and international studies show that a high proportion of children from out-of-home care (OHC) have poor school performance and that this is strongly associated with their substantial risk of adverse development in future life. However, risk factors for poor school performance and adverse development are difficult to disentangle since they are often interrelated and enforce each other over the life course. This study examines premature mortality in relation to early school failure (drop-out from compulsory school) and OHC experience in childhood (0–17 years of age) among clients who were in treatment for substance misuse in the early 1980s (N = 1,036). The analyses were based on record linkages between interview data collected during treatment and national register data covering approximately 30 years of follow-up, from exit from treatment until 2013. Our results showed that 54 per cent had been placed in OHC as children, half before their teens and half as teenagers. The OHC population had a higher prevalence of school failure compared with clients who had not been exposed to childhood OHC. OHC was associated with an excess mortality, although this was only significant for females who had entered OHC before their teens. Adjusting results for school failure reduced their excess mortality by half, and additional life course factors associated with mortality among people with substance misuse adjusted for most of the remaining excess mortality. School failure was strongly associated with the excess mortality of females, but not with the excess mortality of males.

The aim of this thesis is to examine educational stratification in the context of out-of-home care (OHC; foster family care, residential care) and to place one of society’s most vulnerable groups in the fields of social stratification and family complexity research. About 5% of the Swedish population experience OHC during childhood or adolescence. OHC is not only a matter of protecting children and youth; it is also intended to improve future opportunities and compensate for adverse childhood factors. However, a vast body of international research, including Swedish studies, shows that a substantial proportion of young people from OHC have poor school performance and low educational attainment as adults. Furthermore, this is strongly associated with their high risk of other adverse outcomes in life. To date there are no signs of improvement in this regard, and the disadvantage of having a low education is increasing in today’s knowledge-based society.

Many previous OHC studies have relied on small, local samples, and longitudinal data are often lacking. In this respect, Swedish researchers are well positioned to contribute to the field through research based on our high-quality population registers. The main data source in this thesis – the Child Welfare Intervention Register – covers half a century of OHC data. Based on these data, an overview of OHC prevalence in Sweden and patterns of educational outcomes are presented in the introductory chapter. The thesis further consists of five individual studies investigating different aspects of the transition through the educational system to adult life among children and youth from OHC. Two of the five studies focus on children who spent most of their childhood in OHC and for whom society has assumed a long-term commitment of parental responsibilities.

The descriptive data show that patterns of poor educational outcomes in the OHC population have remained stable as long as they can be followed in the registers. Study I shows that youth who exited long-term care were disadvantaged as compared to youth without OHC experience, both in terms of educational attainment and regarding the strong association between poor school performance and other adverse outcomes in young adulthood. Up to 55% of their excess risks of later psychosocial problems were statistically attributable to dismal school performance. Study II shows that 54% of clients in substance-misuse treatment in the 1980s had been in OHC, half before their teen years and half as teenagers. In this group, OHC was associated with excess mortality during the 30-year follow-up from exit from treatment, with statistical significance mainly for females who had entered OHC before their teens. School failure was more common in the OHC population than for misuse clients without OHC experience, and was strongly associated with the excess mortality of females. Two Nordic comparative studies (Studies III and IV) show that the OHC population had a substantially higher risk of not completing upper-secondary education across countries, and that poor performance in primary school inflicted a greater risk in OHC youth of being NEET in young adulthood than for their peers without OHC experience. Study V shows that the intergenerational transmission of education was weak and inconsistent in the foster care setting, and that living in a highly educated foster family did not have a robust positive effect on foster children’s educational outcomes.

Background: Differing results on gender specific factors related to mortality risks among substance misusers highlights the need for further research. The present article is based on a 30-year follow-up study on substance misusers treated in residential care for drug problems in Sweden in 1982-1983 aiming to identify and compare gender differences in predictors of mortality.

Method: Original data consists of personal interviews with 1163 substance misusers treated in inpatient units in Sweden during 1982-1983. The outcome variable is death retrieved from the National Cause of Death Register held by the National Board of Health and Welfare. Gender differences and similarities regarding predictors of mortality was estimated in univariate and multivariate models, using Cox proportional hazards models.

Results: School failure, imprisonment and being a parent without custody of the child seem to constitute risk factors for mortality among women, but not among men. A social network of friends seemed to be more important for men. Treatment-dropout was a significant risk factor for premature death among men, but not among women. Both gender reporting alcohol as their self-reported most dominant substance misuse showed higher mortality risks compared with those with stimulants as dominant substance misuse.

Conclusions: Imprisonment was highly predictive of mortality for the women, suggesting that this group is important to pay particular attention to. Suggested differences in the importance of social factors need to be investigated more thoroughly. The substantial hazard revealed for women with polydrug misuse including alcohol calls for attention to this in treatment for substance misuse.

Parental education is a robust predictor of children’s educational outcomes in general population studies, yet little is known about the intergenerational transmission of educational outcomes in alternative family settings such as children growing up in foster care. Using Swedish longitudinal register data on 2,167 children with experience of long-term foster care, this study explores the hypothesized mediating role of foster parents’ educational attainment on foster children’s educational outcomes, here conceptualized as having poor school performance at age 15 and only primary education at age 26. Results from gender-stratified regression analyses suggest that there was an association between foster parental educational attainment and foster children’s educational outcomes but that the educational transmission was weak and inconsistent and differed somewhat between males and females. For males, lower educational attainment in foster parents was associated with poor school performance but was not associated with educational attainment at age 26. The reverse pattern was found among females: the educational gradient was inconsistent for poor school performance but appeared in educational attainment. The results indicate that supported interventions for improving foster children’s educational achievements are needed, even when placements are relatively stable and foster parents have a long formal education.

Aim: To investigate social inclusion/exclusion in terms of criminality, substance abuse and participation in the labour market in clients treated for substance abuse in Sweden in the 1980s during a follow-up period of 27 years.

Method: SWEDATE data are used for background information on the clients. The data were collected through interviews with clients registered for treatment in 31 in-patient treatment units in 1982 and 1983. Data on labour market status, education and medication related to drugs were collected from public registers. The study population consisted of 1132 individuals, who were followed from the year after exiting from treatment (Year 1) until the end of the follow-up (December 2013).

Results: Among those who survived, the women seem to have succeeded better in terms of social inclusion both at an aggregated level and when the individual pathways were followed during the follow-up period. When comparing pathways between adverse and non-adverse groups during the follow-up period the results show movements from being adverse to non-adverse but also the opposite. In the last follow-up in 2013, the majority of the clients defined as non-adverse for the last nine years were in some way established in the labour market (including studies). In total, about two fifths of the group were in some way established in the labour market.

Conclusions: The fairly high proportion of clients moving between being adverse and non-adverse during the follow-up might support the perspective suggesting that dependence should not be considered as chronic.

We used Swedish national registers to analyse dental health care among young adults with childhood experience of out-of-home care (OHC), in Cox regression analyses. All 1.7 million Swedish residents born in 1980-1994 were included, of whom 4% had been in OHC. The population was followed up in the Dental Health Register from age 20 to 29, during the period 2009-2014. We found that persons with short or long OHC experience made emergency dental care visits more often than their majority-population peers: 17-23% versus 9-10%, (adjusted Hazard ratios [HR:s] 1.60-2.02); they more often had tooth extractions, 9-12% versus 3% (HR:s 2.33-3.03); but less regularly visited a dentist for planned check-ups, 61-77% versus 80-87% (HR:s 0.76-0.78). Since dental health in young adulthood reflects dental health and dental care in childhood, the findings of this study call for improved preventive dental health care for children in OHC.

Previous studies have reported that children and adolescents who have been placed in out-of-home care for the protection of their safety and welfare face considerably high risks for early school leaving. Our study adds to the literature by comparing the association between children's exposure to placement in care and lack of secondary education (i.e. post-compulsory education after age 16) across three Nordic countries: Denmark, Finland, and Sweden. We use data from national registers for children born in 1987, following them until age 23. The datasets for Denmark (N = 55,995, of whom 3056 are in care), Finland (N = 58,855, of whom 1884 are in care), and Sweden (N = 100,152, of whom 3209 are in care) cover the entire birth cohort. To estimate and compare country-specific risks, we calculate average marginal effects from binary logistic regression and adjust the effects for birth mother's socio-economic and health-related background. As expected, the results show that in each country, children placed in care had a significantly higher risk for early school leaving. After adjusting for maternal background, young adults who experienced out-of-home care were 24 to 39 percentage points more likely than their peers never in care to have not completed secondary education. Those placed in care for the first time at teenage were the most likely to have low attainment. In Finland and Sweden, children in care had a similar excess risk for early school leaving, whereas in Denmark the risk was higher. We discuss these results and recommend developing effective interventions to improve the educational attainment of children in care. The difference between Denmark and the other two requires further investigation.

This study addressed school-contextual features of social disorder in relation to sixth-grade students' experiences of bullying victimization and mental health complaints. It investigated, firstly, whether the school's concentrations of behavioural problems were associated with individual students' likelihood of being bullied, and secondly, whether the school's concentrations of behavioural problems and bullying victimization predicted students' emotional and psychosomatic health complaints. The data were derived from the Swedish National Survey of Mental Health among Children and Young People, carried out among sixth-grade students (approximately 12-13 years old) in Sweden in 2009. The analyses were based on information from 59,510 students distributed across 1999 schools. The statistical method used was multilevel modelling. While students' own behavioural problems were associated with an elevated risk of being bullied, attending a school with a higher concentration of students with behavioural problems also increased the likelihood of being bullied. Attending a school with higher levels of bullying victimization and behavioural problems predicted more emotional and psychosomatic complaints, even when adjusting for their individual level analogues. The findings indicate that school-level features of social disorder influence bullying victimization and mental health complaints among students.

Objective: The influence of psychopathology on suicide method has revealed different distributions among different psychiatric disorders. However, evidence is still scarce. We hypothesized that having a diagnosis of personality disorder (PD) affect the suicide method, and that different PD clusters would influence the suicide method in different ways. In addition, we hypothesized that the presence of psychiatric and somatic co-morbidity also affects the suicide method. Method: We examined 25,217 individuals aged 15-64 who had been hospitalized in Sweden with a main diagnosis of PD the years 1987-2013 (N = 25,217). The patients were followed from the date of first discharge until death or until the end of the follow-up period, i.e. December 31, 2013, for a total of 323,508.8 person-years, with a mean follow up time of 11.7 years. The SMR, i.e. the ratio between the observed number of suicides and the expected number of suicides, was used as a measure of risk. Results: Overall PD, different PD-clusters, and comorbidity influenced the suicide method. Hanging evidenced highest SMR in female PD patients (SMR 34.2 (95% CI: 29.3-39.8)), as compared to non-PD patients and jumping among male PD patients (SMR 24.8 (95% CI: 18.3-33.6)), as compared to non PD-patients. Furthermore, the elevated suicide risk was related to both psychiatric and somatic comorbidity. Conclusion: The increased suicide risk was unevenly distributed with respect to suicide method and type of PD. However, these differences were only moderate and greatly overshadowed by the overall excess suicide risk in having PD. Any attempt from society to decrease the suicide rate in persons with PD must take these characteristics into account.