Screen Time and Puberty Timing: Findings from the Adolescent Brain Cognitive Development Study.

Area of Science:

• Pediatric Endocrinology
• Developmental Psychology
• Public Health

Background:

• Pubertal timing is influenced by various factors, and understanding new influences like screen time is crucial.
• Adolescent screen media use has increased significantly, raising concerns about potential health impacts.
• The Adolescent Brain Cognitive Development (ABCD) study provides a rich dataset for investigating developmental trajectories.

Purpose of the Study:

• To investigate the association between screen time in late childhood and the timing of pubertal development.
• To determine if higher screen time predicts earlier pubertal maturation across adolescence.
• To explore potential sex differences in this association.

Main Methods:

• Longitudinal cohort study of 10,786 participants from the ABCD study.
• Parent-reported screen time data collected at baseline (mean age ~9.9 years).
• Pubertal timing assessed using the Pubertal Development Scale (PDS) over a 4-year follow-up period, with statistical adjustments for covariates.

Main Results:

• Increased screen time at baseline was significantly associated with more advanced pubertal timing at 1, 2, and 3-year follow-ups.
• The association between screen time and earlier puberty was more pronounced in girls.
• Participants with very high screen time reached mid-puberty approximately 2.5 months earlier than those with very low screen time.

Conclusions:

• Screen time in late childhood is a significant predictor of earlier pubertal development.
• These findings underscore the importance of parental guidance regarding preadolescent screen media consumption.
• Further research may explore underlying biological or behavioral mechanisms linking screen time and puberty.