{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T21:15:26Z","timestamp":1789679726833,"version":"4.0.1"},"reference-count":70,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2021,8,26]],"date-time":"2021-08-26T00:00:00Z","timestamp":1629936000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Psychol."],"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> The increase in problematic Internet use (PIU) among medical students and resident doctors during the coronavirus disease 2019 (COVID-19) pandemic may be leading to significant impairments in everyday functioning, including sleeping patterns, anxiety, depressive symptoms, and overall well-being. The Compulsive Internet Use Scale (CIUS) has been developed to assess the severity of PIU, however, it has not been elucidated whether this scale is also applicable to medical students and resident doctors. The first aim of this study was to explore the psychometric properties of the Lithuanian version of the CIUS. The second aim was to examine associations between subjectively reported mental health symptoms and PIU during the COVID-19 pandemic.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> A total of 524 medical students and resident doctors (78.60% women, mean age 24 [SD 3] years old) participated in an online survey between December 2020 and February 2021. Participants completed the CIUS, the Pittsburgh Sleep Quality Index (PSQI) questionnaire, the Patient Health Questionnaire-9 (PHQ-9), the Generalized Anxiety Disorder Assessment-7 (GAD-7), and the WHO\u2014Five Well-Being Index questionnaire (WHO-5).<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> The confirmatory factor analysis (CFA) suggested brief versions (CIUS-5, CIUS-7, and CIUS-9) rather than the original (CIUS-14) version of the CIUS questionnaire as reliable and structurally stable instruments that can be used to measure compulsive Internet use severity in the sample of medical students and resident doctors. The most prevalent online behaviors were social media use (90.1%), online shopping (15.6%), and online gaming\/gambling (11.3%). Students with higher CIUS scores reported significantly lower academic achievements during the 6 months (<jats:italic>r<\/jats:italic> = 0.12\u20130.13; <jats:italic>p<\/jats:italic> &amp;lt; 0.006), as well as more severe depressive and anxiety symptoms, worsened sleep quality, and lower sense of well-being (<jats:italic>r<\/jats:italic> = 0.21\u20130.41; <jats:italic>p<\/jats:italic>'s &amp;lt; 0.001). Both, during workdays (<jats:italic>d<\/jats:italic> = 0.87) and weekend (<jats:italic>d<\/jats:italic> = 0.33), students spent more time online than resident doctors (<jats:italic>p<\/jats:italic>'s &amp;lt; 0.001).<\/jats:p><jats:p><jats:bold>Conclusion:<\/jats:bold> The brief, 5-, 7-, and 9-item versions of the Lithuanian CIUS are reliable and valid self-report screening instruments for evaluating the severity of PIU symptoms among the medical student population. Symptoms of PIU during the COVID-19 period were associated with worsened self-reported mental health and everyday functioning.<\/jats:p>","DOI":"10.3389\/fpsyg.2021.685137","type":"journal-article","created":{"date-parts":[[2021,8,31]],"date-time":"2021-08-31T12:57:03Z","timestamp":1630414623000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":26,"title":["Compulsive Internet Use Scale: Psychometric Properties and Associations With Sleeping Patterns, Mental Health, and Well-Being in Lithuanian Medical Students During the Coronavirus Disease 2019 Pandemic"],"prefix":"10.3389","volume":"12","author":[{"given":"Egle","family":"Milasauskiene","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julius","family":"Burkauskas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aurelija","family":"Podlipskyte","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Orsolya","family":"Kir\u00e1ly","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zsolt","family":"Demetrovics","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laurynas","family":"Ambrasas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vesta","family":"Steibliene","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2021,8,26]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"12","DOI":"10.1186\/s42506-019-0009-6","article-title":"Prevalence of internet addiction and its associated factors among female students at Jouf University, Saudi Arabia","volume":"94","author":"Abdel-Salam","year":"2019","journal-title":"J. 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