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Introduction Relatively little is known about whether the association between smoking and depressive symptoms changes with age and how the trajectories of smoking and depressive symptoms are intertwined during the life course. In this population-based study, these associations were examined from young adulthood to middle age. Methods Participants of a Finnish cohort study (N = 1955) were assessed at the ages of 22, 32, 42, and 52 using questionnaires covering daily smoking (yes/no) and the short 13-item Beck Depression Inventory. Longitudinal latent class and longitudinal latent profile analyses were used to identify life course trajectories of smoking and depressive symptoms. Results The proportions of daily smokers decreased, while levels of depressive symptoms increased among both females and males from age 22 to 52 years. Smoking was associated with higher levels of depressive symptoms from age 22 to 42 years, while not at 52. Associations among males prevailed when adjusting for education, marital status, and alcohol use. Four life course classes of daily smoking (nonsmokers, decreasing prevalence of smoking, persistent smokers, and increasing prevalence of smoking) and four trajectories of depressive symptoms (low, increasing/moderate, decreasing/moderate, and high) were identified. In males, persistent daily smokers (relative risk ratio (RRR) = 4.5, 95% confidence interval (CI): 2.2 to 9.2) and those in the class with increasing smoking prevalence (RRR = 3.2, 95% CI: 1.1 to 9.1) had an increased risk of belonging to the high depressive symptoms profile. In females these associations were nonsignificant. Conclusions Compared to females, the relationship between smoking and depressive symptoms seems more robust among males during adulthood. Specifically, males smoking persistently from young adulthood to middle age have an increased risk of high depressive symptoms trajectory. Implications This population-based cohort with 30 years of follow-up showed that the life course trajectories of daily smoking and depressive symptoms are associated. Persistent daily smokers and those starting late had an increased risk of belonging to the profile with constantly high levels of depressive symptoms during the life course. However, these associations were statistically significant only in males. Actions should be strengthened, especially in males, to prevent smoking initiation, to help smoking cessation, and to identify and treat depression in smokers with significant depressive symptoms. [ABSTRACT FROM AUTHOR]

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Research has consistently shown that difficulties in facial emotion recognition (FER) are associated with peer problems and internalizing symptoms during middle childhood. However, no longitudinal research has investigated the direction of effects, that is, how these constructs influence each other across time. In this preregistered three-wave panel study, we tested the directional effects between FER, peer problems, and internalizing symptoms among Finnish school-aged children (n = 3,607; M age = 8.20, SD age = 0.86; 51% female). The results of random-intercept cross-lagged panel models showed that a low FER accuracy and high biases toward happiness and sadness correlated with higher levels of peer problems and internalizing symptoms at the between-person level. However, we found no evidence of directional effects at the within-person level. Overall, our findings suggest that these constructs might be associated because of shared underlying causes, rather than mutually influencing one another in middle childhood. [ABSTRACT FROM AUTHOR]

The study investigated whether cuts to school resources made during economic recession contribute to children's psychiatric and economic problems in early adulthood. The cohort consisted of 817 Finnish children. Data was gathered from teachers during a recession (child age 12) and from national registers on children's post-recession use of psychiatric and income benefit services (age 18-28). Children's need for remedial instruction, special education, or psychosocial services was associated with later use of income support and psychiatric services. Those receiving special education had an increased risk for adulthood use of psychiatric services as compared to those who needed, but did not receive, this service. A decrease in material resources and teachers' loss of motivation predicted children's later use of psychiatric services.