Social epidemiology of Fitbit daily steps in early adolescence.

"Competing interests The authors declare no competing interests."

"Funding J.M.N. was supported by the American Heart Association Career Development Award (CDA34760281), the National Institutes of Health (K08HL159350), and the Doris Duke Charitable Foundation (2022056). The ABCD Study was supported by the National Institutes of Health and additional federal partners under award numbers U01DA041022, U01DA041025, U01DA041028, U01DA041048, U01DA041089, U01DA041093, U01DA041106, U01DA041117, U01DA041120, U01DA041134, U01DA041148, U01DA041156, U01DA041174, U24DA041123, and U24DA041147. A full list of supporters is available at https://abcdstudy.org/federal-partners/. A listing of participating sites and a complete listing of the study investigators can be found at https://abcdstudy.org/principal-investigators.html. ABCD consortium investigators designed and implemented the study and/or provided data but did not necessarily participate in analysis or writing of this report. The funders had no role in the study analysis, decision to publish the study, or the preparation of the manuscript."