1 Division of Adolescent and Young Adult Medicine, Department of Pediatrics, University of California, San Francisco.
2 Program in Public Health, Department of Family, Population and Preventive Medicine, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York.
3 Center for Health Sciences, SRI International, Menlo Park, California.
4 Seattle Children's Research Institute, Seattle Children's Hospital, Seattle, Washington.
5 Department of Pediatrics, University of Washington, Seattle.
This study uses data on smartphone usage in schools from the ABCD (Adolescent Brain Cognitive Development) Study to characterize smartphone app usage during school hours in a diverse sample of US adolescents.