Previous research has demonstrated a graded relationship between cumulative childhood adversity and adverse later outcomes. Individuals with out-of-home care (OHC) experience constitute a population characterised by both childhood and educational disadvantages. Based on a fifty-year follow-up of a Stockholm cohort born in 1953, the purpose of this study was to examine the associations between cumulative childhood adversity and long-term educational outcomes in this group. The cumulative disadvantage perspective suggests that there would be a negative association, while the disadvantage saturation perspective implies that cumulative adversity would be less consequential for disadvantaged individuals. By means of multigroup path analysis, we furthermore asked whether this association may differ in relation to individuals with child welfare contact (CWC) and to the general population (GP). Adjusting for socioeconomic conditions and cognitive ability, cumulative childhood adversity had a negative influence on midlife educational attainment in the GP. However, it did not seem to influence the educational outcomes of neither OHC experienced individuals nor individuals with other types of CWC. The results of this study thus lend support to the disadvantage saturation perspective. Further studies are needed to explore this relationship. 

The multifaceted concept of resilience is widely used to describe individual or societal abilities to withstand and adjust to external pressures. In relation to health, resilience can help us to understand a positive health development despite adverse circumstances. The authors of this article aimed to disentangle this complex concept by elaborating on three metaphors commonly used to describe resilience. Similarities and differences between resilience as a rock, a dandelion, and a steel spring are discussed. The metaphors partly overlap but still provide slightly different perspectives on the development and manifestation of resilience. With reference to longitudinal studies of long-term health development, the article also elaborates on how resilience relates to temporal dimensions commonly used in epidemiological studies: age, cohort, and period. Moreover, the interaction between resilience at individual, organizational, and societal levels is discussed. In conclusion, it is argued that public health sciences have great potential to further a theoretical discussion that improves our understanding of resilience and promotes the integration of individual- and community-level perspectives on resilience.

Taking a life course approach can help us to understand health inequalities. This thesis illustrates that socially-patterned childhood experiences might play a critical role for inequalities in mortality. The association between childhood adversity and premature mortality is investigated in the context of a 1953 Stockholm birth cohort. Over a series of four empirical studies, it is shown that childhood adversity is a major risk factor for premature mortality, and is a significant contributor to socioeconomic inequalities in mortality.

More specifically, Study I found that indicators of early life socioeconomic disadvantage and childhood adversity were individually associated with adult mortality. When all of these co-occurring indicators were studied simultaneously, involvement with child welfare services – specifically involvement resulting in placement in out-of-home care – was the indicator most robustly associated with premature mortality in adulthood. Based on the results Study I, involvement with child welfare services was used as a proxy for childhood adversity the following three studies.

Study II showed that involvement with child welfare services could explain almost half of the education and income gradients in life-expectancy between ages 29–67.

Study III demonstrated that the increased mortality risk among adults who were placed in out-of-home care as children persisted to midlife. Moreover, increased mortality risks after out-of-home care were not unique to the Swedish welfare context but could be verified in a cohort from Great Britain.

Finally, Study IV found that adults who experienced involvement with child welfare services not only had increased risks of major diseases in adulthood, but also had worse survival prospects after a first hospitalisation.

Involvement with child welfare services, specifically placement in out-of-home care, can have consequences for socioeconomic attainment, and physical and mental health. Even in this cohort that entered adulthood during some of the most generous years of the Swedish welfare state, the unequal distribution of life chances following experiences of childhood adversity was not eliminated. These empirical studies extend our understanding of how childhood adversity contributes to the complex processes that generate inequalities in mortality. The results further indicate that it is never too early nor too late to prevent inequalities in health.

Background: Childhood adversity indicated by involvement with child welfare services (ICWS) is associated with increased risks of disease and injuries in young adulthood. It is yet unknown whether such risks are limited to external causes and mental and behavioural disorders or whether they extend beyond early adulthood and to non-communicable diseases (NCDs) with later onset. Moreover, it has not been explored whether ICWS associates with decreased survival prospects following hospitalisation.

Methods: Based on prospective data for a 1953 Stockholm birth cohort (n=14 134), ICWS was operationalised distinguishing two levels in administrative child welfare records (ages 0–19; ‘investigated’ and ‘placed’ in out-of-home care (OHC)). Hospitalisations and all-cause mortality (ages 20–66) were derived from national registers. Hospitalisation records were categorised into external causes and NCDs, and nine subcategories. Negative binomial regression models were used to estimate differences in hospitalisation risks between those with and without experiences of ICWS and Cox survival models to estimate mortality after hospitalisation.

Results: Placement in OHC was associated with higher risks of hospitalisation due to external causes and NCDs and all investigated subcategories except cancers. Risks were generally also elevated among those investigated but not placed. ICWS was further linked to higher mortality risks following hospitalisation.Conclusion Differential risk of morbidity and differential survival may explain inequalities in mortality following childhood adversity. We conclude that the healthcare sector might play an important role in preventing and mitigating the elevated risks of externally caused morbidity, disease and premature mortality observed among those with a history of ICWS.

Experiences of childhood adversity are common and have profound health impacts over the life course. Yet, studying health outcomes associated with childhood adversity is challenging due to a lack of conceptual clarity of childhood adversity, scarce prospective data, and selection bias. Using a 65-year follow-up of a Swedish cohort born in 1953 (n = 14,004), this study examined the relationship between childhood adversity (ages 0-18) and premature all-cause mortality (ages 19-65). Childhood adversity was operationalized as involvement with child welfare services, household dysfunction, and disadvantageous family socioeconomic conditions. Survival models were used to estimate how much of the association between child welfare service involvement and mortality could be explained by household dysfunction and socioeconomic conditions. Results show that individuals who were involved with child welfare services had higher hazards of dying prematurely than their majority population peers. These risks followed a gradient, ranging from a hazard ratio of 3.08 (95% CI: 2.68-3.53) among those placed in out-of-home care, followed by individuals subjected to in-home services who demonstrated a hazard ratio of 2.53 (95% CI: 1.93-3.32), to a hazard ratio of 1.81 among those investigated and not substantiated (95% CI: 1.55-2.12). Associations between involvement with child welfare services and premature all-cause mortality were robust to adjustment for household dysfunction and disadvantageous family socioeconomic conditions. Neither household dysfunction nor socioeconomic conditions were related with mortality independent of child welfare services involvement. This study suggests that involvement with child welfare services is a viable proxy for exposure to childhood adversity and avoids pitfalls of self-reported or retrospective measures.

Child welfare involvement reflects childhood adversity and is associated with increased adult mortality, but it remains unclear how this association changes over the life course. Drawing on the Stockholm Birth Cohort Multigenerational Study (Sweden) and the National Childhood Development Study (Great Britain) this study examines whether inequalities within these cohorts diverge or converge. Involvement with child welfare services (ICWS) is divided into two levels ('child welfare contact' and 'out-of-home care'). For each cohort, we quantify absolute health inequalities as differences in cumulative probabilities of death (18-58 years) and temporary life expectancy; and relative inequalities as hazard ratios in ten-year intervals and ratios of lifetime lost. Persistently, ICWS was associated with premature mortality. The strength of the association varied by age, sex and level of ICWS. Consistently across both countries, the most robust relationship was between out-of-home care and mortality, with statistically significant age-specific hazard ratios ranging between 1.8 and 3.4 for males and 1.8-2.1 for females. Child welfare contact that did not result in out-of-home placement showed less consistent results. Among females the mortality gap developed later compared to males. Estimates attenuate after controlling for family socioeconomic and other background variables but patterns remain intact. Our results show that absolute inequalities widen with increasing age, while relative inequalities might peak in early adulthood and then stabilize in midlife. The relative disadvantage among looked-after children in early adulthood is heightened by overall low rates of mortality at this age. Absolute inequality increases with age, highlighting the weight of the accumulation of disadvantage in mortality over time. The bulk of excess deaths that could be attributed to ICWS occurs from midlife onwards. Mechanisms that uphold the disadvantage after childhood experiences require further exploration. This study highlights that the association between out-of-home care and premature mortality seems to transcend welfare systems.

Background: Literature on outcomes of children in out-of-home care (OHC) is extensive. However, less is known regarding associations of such placements with parental mental health disorders (MHD).

Objective: This study investigated changes in hospitalization rates due to MHD among parents, four years before and after placement of their child in OHC.Participants and settingWe used data on 4067 members (Generation 1) of the RELINK53 cohort (individuals born and living in Sweden in 1953) and their 5373 children (Generation 2) in OHC.

Methods: Using random effects regression models, associations between OHC and MHD were examined separately for fathers and mothers. Nested models were tested exploring associations with parent and child/placement-related factors. Marginal effects were computed to assess mean rates of hospitalization annually.

Results: Overall, mothers had higher mean hospitalization rates than fathers. Compared to the year of placement, hospitalization rates were significantly lower in the four years before placement for mothers (9.9 %, 9.5 %, 10.5 %, 12.1 %, respectively) and fathers (5.9 %, 7.6 %, 8 %, 9.8 %, respectively). Mothers showed highest hospitalization rates at the year of placement (26.6 %), while fathers, one year after placement (13.4 %). Hospitalization rates declined significantly directly after placement among mothers, but an unclear and non-significant pattern of results was found among fathers.

Conclusions: Most parents have higher hospitalization rates at and directly after placement. Potential hypotheses underlying these findings are discussed, including psychosocial gender differences and opportunities to seek care as means of reunification. There is an urgency to develop strategies to better support these parents throughout the process.

Previous studies have shown that mental health disorders (MHD) among parents might be an important mechanism in the intergenerational transmission of out-of-home care (OHC). The current study aimed to further study this interplay by investigating the associations between OHC and MHD within and across generations. We used prospective data from the Stockholm Birth Cohort Multigenerational Study (SBC Multigen) on 9033 cohort members (Generation 1; G1) and their 15,305 sons and daughters (Generation 2; G2). By odds ratios of generalised structural equation modelling, we investigated the intergenerational transmission of OHC and MHD, respectively, as well as the association between OHC and MHD within each generation. Second, we examined the associations between OHC and MHD across the two generations. In order to explore possible sex differences, we performed the analyses stratified by the sex of G2. The results showed an intergenerational transmission of OHC, irrespective of sex. Regarding the intergenerational transmission of MHD, it was shown for both sexes although only statistically significant among G2 males. OHC was associated with MHD within both generations; in G2, this association was stronger among the males. While we found no direct association between OHC in G1 and MHD in G2, there was a significant association between MHD in G1 and OHC in G2. The latter was more evident among G2 females than G2 males. We conclude that OHC and MHD seem to be processes intertwined both within and across generations, with some variation according to sex. Although there did not seem to be any direct influences of OHC in one generation on MHD in the next generation, there was some indication of indirect paths going via parental MHD and child OHC.

Life course epidemiology aims to study the effect of exposures on health outcomes across the life course from a social, behavioural, and biological perspective. In this Review, we describe how life course epidemiology changes the way the causes of chronic diseases are understood, with the example of hypertension, breast cancer, and dementia, and how it guides prevention strategies. Life course epidemiology uses complex methods for the analysis of longitudinal, ideally population-based, observational data and takes advantage of new approaches for causal inference. It informs primordial prevention, the prevention of exposure to risk factors, from an eco-social and life course perspective in which health and disease are conceived as the results of complex interactions between biological endowment, health behaviours, social networks, family influences, and socioeconomic conditions across the life course. More broadly, life course epidemiology guides population-based and high-risk prevention strategies for chronic diseases from the prenatal period to old age, contributing to evidence-based and data-informed public health actions. In this Review, we assess the contribution of life course epidemiology to public health and reflect on current and future challenges for this field and its integration into policy making.