Figure 1. Accrual of Adolescents in Study of Digital Media Use and ADHD.

Participants who did not provide data at the 4 follow-ups represent students who were not present during in-class data collections due to absence or being no longer enrolled at 1 of the study schools. See eTable 2 in the Supplement for the number of students completing 1 or multiple follow-up assessments. ADHD indicates attention-deficit/hyperactivity disorder.