Problematic technology use and sleep quality in young adulthood: novel insights from a nationally representative twin study.

"Disclosure Statement AG is an advisor for a project initially sponsored by Johnson’s Baby. She is a consultant for Perrigo (2021+). She receives royalties for two books Nodding Off (Bloomsbury Sigma, 2018) and The Sleepy Pebble (Flying Eye, 2019). She has another contract with Lawrence King Publishers (publication due in 2023). She is a regular contributor to BBC Focus magazine and has contributed to other outlets (such as The Conversation, The Guardian, and Balance Magazine). She occasionally receives sample products related to sleep (e.g. blue light-blocking glasses) and has given a paid talk to a business. She is a specialist subject editor at JCPP (sleep) for which she receives a small honorarium. She has contributed a paid article to Neurodiem. She was previously a director at Sleep Universal (2022). NB is the founder and sleep scientist at Sleep Universal—an independent scientific consulting practice. She received no financial support for contributing to this manuscript and this manuscript is independent of her consulting practice. The rest of the authors have nothing to declare. Nonfinancial disclosure: None."

"Funding The E-Risk Study is funded by the Medical Research Council (UKMRC grant G1002190). Additional support was provided by the National Institute of Child Health and Human Development (grant HD077482) and by the Jacobs Foundation. Candice L. Odgers is supported by the Jacobs Foundation and the Canadian Institute for Advanced Research. Timothy Matthews is a British Academy Postdoctoral Fellow. Louise Arseneault is the Mental Health Leadership Fellow for the UK ESRC."