Quotes a study reporting associations between adolescent smartphone ownership, depression, obesity and in…

https://publications.aap.org/pediatrics/article-abstract/157/1/e2025072941/205716/Smartphone-Ownership-Age-of-Smartphone-Acquisition?autologincheck=redirected "Smartphone Ownership, Age of Smartphone Acquisition, and Health Outcomes in Early Adolescence Available to Purchase" "RESULTS At age 12 years, compared with not owning a smartphone (n = 3849), smartphone ownership (n = 6739) was associated with higher risk for depression (odds ratio [OR] 1.31, 95% CI: 1.05–1.63), obesity (OR 1.40, 95% CI: 1.20–1.63), and insufficient sleep (OR 1.62, 95% CI: 1.46–1.79). Younger age of smartphone acquisition was associated with obesity and insufficient sleep (for each earlier year of acquisition, OR 1.09, 95% CI: 1.02–1.16, and OR 1.08, 95% CI: 1.02–1.12, respectively). At age 13 years, among 3486 youth who did not own a smartphone at age 12 years, those who had acquired a smartphone in the past year (n = 1546) had greater odds of reporting clinical-level psychopathology (OR 1.57, 95% CI: 1.12–2.20) and insufficient sleep (OR 1.50, 95% CI: 1.26–1.77) compared with those who had not (n = 1940) after controlling for baseline mental health and sleep. Results were consistent across several sensitivity analyses. CONCLUSIONS Smartphone ownership was associated with depression, obesity, and insufficient sleep in early adolescence. Findings provide critical and timely insights that should inform caregivers regarding adolescent smartphone use and, ideally, the development of public policy that protects youth."