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This study examined the frequency of at-risk and pathological social media use and factors associated with PSMU using data from T1 (wave 7; 2024) and T2 (wave 8; 2025) of the German population-based COPSY study, including 1,439 young people aged 11\u201321 years. PSMU was assessed at T2 with the ICD-11\u2013based parent-report screening instrument SOMEDIS-P. At T2, 21.6% of young people reported intense social media use (\u2265\u20094\u00a0h\/day). Overall, 23.6% were classified as having at-risk social media use and 4.9% as having pathological social media use according to the SOMEDIS-P cut-offs. For the logistic regression analyses, at-risk and pathological social media use were combined into a single PSMU outcome. Logistic regression analyses examined associations with sociodemographic, psychosocial, and behavioral factors. In the multivariable model, intense social media use at T2 only (OR\u2009=\u20093.81, 95% CI [1.89\u20137.65]), intense social media use at T1 only (OR\u2009=\u20092.09, 95% CI [1.01\u20134.32]), increases in social exclusion\/devaluation from T1 to T2 (OR\u2009=\u20091.41, 95% CI [1.07\u20131.85]), and loneliness at T1 (OR\u2009=\u20091.75, 95% CI [1.15\u20132.64]) were associated with higher odds of PSMU. Family cohesion at T1 (OR\u2009=\u20090.98, 95% CI [0.97\u20130.99]), physical activity at T2 (OR\u2009=\u20090.78, 95% CI [0.70\u20130.88]), and sleep quality at T2 (OR\u2009=\u20090.91, 95% CI [0.86\u20130.95]) were associated with lower odds. These findings underscore the multifactorial nature of PSMU and its associations with psychosocial, social, and health-related factors.<\/jats:p>","DOI":"10.1007\/s00787-026-03189-y","type":"journal-article","created":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T04:39:26Z","timestamp":1789533566000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Problematic social media use among young people in Germany: frequency and associated psychosocial and behavioral factors \u2013 results from the COPSY study"],"prefix":"10.1007","author":[{"given":"Fionna","family":"Zoellner","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne","family":"Kaman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Erhart","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kerstin","family":"Paschke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ann-Kathrin","family":"Napp","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Franziska","family":"Reiss","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Janine","family":"Devine","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ulrike","family":"Ravens-Sieberer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,9,16]]},"reference":[{"key":"3189_CR1","doi-asserted-by":"publisher","first-page":"100404","DOI":"10.1016\/j.chbr.2024.100404","volume":"14","author":"A Sala","year":"2024","unstructured":"Sala A, Porcaro L, G\u00f3mez E (2024) Social Media Use and adolescents\u2019 mental health and well-being: An umbrella review. 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