To the Editor Ms Ra and colleagues investigated whether digital media use was associated with subsequent symptoms of attention-deficit/hyperactivity disorder (ADHD) in adolescents. The study reported a slight risk (odds ratio, 1.11) that higher digital media use was associated with a higher likelihood of displaying at least 6 ADHD symptoms during the next 2 years. Dr Radesky’s Editorial raised important points about the role of unmeasured confounders. We agree that a number of factors may influence the results of Ra and colleagues. For example, both cognition and digital media use could be influenced by family chaos, sleep, academic disinterest, peer activity, and excessive passive leisure time. In addition, adolescents long have been distracted by a range of media—from science fiction books to rock music. Digital media use could be a result, rather than a source, of typical adolescent sensation seeking.