Keywords: Adolescents, Adolescents, screen use, reading, brain volume, brain development
Motivation: The causal relationships between screen use and mental health were not clear.
Goal(s): We used genetic, imaging, and questionnaire data from ABCD study to investigate the causal relationships between screen use and mental health in early adolescents.
Approach: One-sample Mendelian randomization analysis.
Results: We found a direct causal relationship between screen use and behavior problems and an indirect effect between screen use and brain volume by the changes in reading habits.
Impact: These findings provide new evidence for a causal influence of screen use and reading habits on brain development and highlight the importance of monitoring media use and related habits change in children.
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