Abstract
Background: Mental health problems in adolescence are associated with impaired function in young adulthood. Our aim was to assess how a hypothetical reduction in mental health problems in adolescence was related to medical benefits in young adulthood and to examine the mediating role of completion of upper secondary school. Methods: We used a population-based sample of more than 10,000 10th-grade adolescents with self-reported data on internalizing and externalizing mental health problems. The sample was linked to the Norwegian national registers of education and medical benefits. The mediation analysis was based on a causal inference framework. Results: During a three-year period in young adulthood, 6.4% of men and 5.9% of women received medical benefits. A two-point hypothetical reduction in externalizing problems was related to a lower probability of receiving medical benefits of 1.5 (95% confidence interval (CI) 1.0–2.1) percentage points in young men and 1.8 (95% CI 1.3–2.3) percentage points in young women. The proportion mediated by the completion of upper secondary school was 52% (95% CI 36–76) among boys and 42% (95% CI 29–60) among girls. The corresponding reduction in the probability of receiving medical benefits was 1.8 percentage points for internalizing problems in both sexes (95% CI boys 1.2–2.4 and girls 1.4–2.2). The proportion mediated was lower for internalizing problems and was only significant among girls (19%).
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