The emergence and persistence of inequalities in adolescent mental health: the Resilience, Ethnicity and AdolesCent Mental Health (REACH) cohorts
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Background
Mental health problems are not distributed equally in society. Our understanding of when social inequalities in mental health emerge is limited. We sought to examine inequalities in trajectories of mental distress in diverse, representative cohorts of adolescents in inner-London.
Methods
We analysed longitudinal data from our cohort study of adolescent mental health, REACH (n=4663; 51% girls, 29% free school meals [FSM], 85% minoritised ethnic groups). We used latent growth curve models to estimate trajectories of mental distress (total, internalising, and externalising scores from the self-report Strengths and Difficulties Questionnaire) from age 11-16 years, overall and by gender, FSM, ethnic group, and their intersections.
Results
We found strong evidence of differences in trajectories of mental distress by gender and FSM. Higher mean internalising scores in girls (vs. boys) were evident at age 11-12 and this inequality widened year-on-year (difference in mean intercepts: 0.74 [95% CI 0.52, 0.96]; slopes: 0.50 [0.39, 0.61]). Higher mean levels of distress among those receiving FSM (vs. not) were evident at age 11-12 years (e.g., difference in intercepts, general distress: 0.79 [0.19, 1.39]), and this difference, though modest, persisted through adolescence. By ethnic group and intersecting identities, the picture was more complex and mixed. Broadly, Black African youth generally reported better mental health trajectories vs. their peers; Black Caribbean and Mixed Black-and-White youth shared similar trajectories, differing somewhat from Black African; and by age 16, internalising distress was highest among lower-income White British girls.
Conclusions
In diverse inner-cities, adolescence is an important period in the emergence and persistence of some of the inequalities in mental health reported in adults; others are more nuanced.
