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Moving beyond the traditional focus on screen time, this study examined the association between smartphone attachment and mental health among adolescents.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Data were analyzed from 137 community\u2010dwelling adolescents (aged 16.5\u201318 years). Smartphone attachment was measured by the Mobile Phone Involvement Questionnaire (MPIQ). Patient Reporting Outcome Measures (PROMIS) pediatric short forms were used to measure anxiety, depression, sleep disturbance, and general health. <jats:italic>t<\/jats:italic>\u2010tests and ANOVAs compared anxiety and depression scores between groups above and below the MPIQ threshold for moderate\u2010to\u2010severe attachment. Multivariable regressions estimated associations between smartphone attachment and mental health outcomes, adjusting for demographics and health factors.<\/jats:p><\/jats:sec><jats:sec><jats:title>Findings<\/jats:title><jats:p>Participants were a mean age of 17.7\u2009\u00b1\u20090.6 years, 51.1% female, and 79.6% White and 96.4% non\u2010Hispanic. Mean MPIQ score was 28.90\u2009\u00b1\u20098.85, with females scoring higher than males (30.5 vs. 27.2, <jats:italic>p<\/jats:italic>\u2009=\u20090.03). Adolescents above the MPIQ threshold for moderate\u2010severe attachment (\u2009\u2265\u200932) reported significantly higher anxiety (52.9 vs. 46.3, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and depression (51.4 vs. 46.3, <jats:italic>p<\/jats:italic>\u2009=\u20090.002). In regression models, MPIQ scores were significantly associated with anxiety (adj. <jats:italic>\u00df\u2009<\/jats:italic>=\u20090.26, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.01, CI\u2009=\u2009[0.099, 0.41]) and depression (adj. <jats:italic>\u00df<\/jats:italic>\u2009=\u20090.15, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05, CI\u2009=\u2009[0.16, 0.28]), adjusting for demographics and health factors.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Findings highlight a clinical concern for adolescents with elevated smartphone attachment, particularly among females. Targeted interventions are needed to prevent worsening mental health related to smartphone attachment.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jcap.70030","type":"journal-article","created":{"date-parts":[[2025,7,24]],"date-time":"2025-07-24T10:18:57Z","timestamp":1753352337000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Association Between Smartphone Attachment and Mental Health in Adolescents"],"prefix":"10.1111","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-5674-7822","authenticated-orcid":false,"given":"Xiaoxuan","family":"Liu","sequence":"first","affiliation":[{"name":"University of Pennsylvania School of Nursing Philadelphia Pennsylvania USA"},{"name":"Center for Injury Research and Prevention at the Children's Hospital of Philadelphia Philadelphia Pennsylvania 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