{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T16:55:23Z","timestamp":1774025723458,"version":"3.50.1"},"reference-count":48,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2020,1,30]],"date-time":"2020-01-30T00:00:00Z","timestamp":1580342400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>There are different concepts that translate abusive Internet use. Almost all these concepts converge on excessive time spent online, which can trigger the emergence of problematic situations. Most of the studies reported in the literature, both nationally and internationally, focused on a young population and found negative consequences of this Internet misuse. The objective of this study consists of associating the time spent using the Internet\u2014in years, times per week, and hours per day\u2014with psychopathological symptoms, as well as assessing the perception of loneliness, in an adult Portuguese population. A quantitative approach, based on a survey application, was conducted in a convenience sample composed by 418 participants (64.4% female), with a mean age of 29.9 years old (SD = 9.26), ranging from 18 to 73 years. The results suggest that maladaptive patterns of Internet use found in young people seem to be replicated in the adult population. A relationship between time spent on the Internet and psychopathological symptoms, and an association between loneliness and the number of hours spent on the Internet, were also identified. In an individualized and disconnected offline world, Internet impact in individuals\u2019 well-being results must be highlighted, since it should be understood as a public health issue. The novelty of this study lies in the target population: Portuguese Internet users over 18 years of age, for which there is no specific study on the subject, thus emphasizing the transverse nature of the problem.<\/jats:p>","DOI":"10.3390\/ijerph17030856","type":"journal-article","created":{"date-parts":[[2020,1,31]],"date-time":"2020-01-31T05:55:46Z","timestamp":1580450146000},"page":"856","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Psychopathological Symptoms and Loneliness in Adult Internet Users: A Contemporary Public Health Concern"],"prefix":"10.3390","volume":"17","author":[{"given":"\u00c2ngela","family":"Leite","sequence":"first","affiliation":[{"name":"Faculdade de Filosofia e Ci\u00eancias Sociais, Universidade Cat\u00f3lica Portuguesa, Rua de Cam\u00f5es 60, 4710-362 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3028-0563","authenticated-orcid":false,"given":"Ana","family":"Ramires","sequence":"additional","affiliation":[{"name":"Faculdade de Turismo e Hospitalidade, Universidade Europeia, Rua Laura Ayres 4, 1650-510 Lisboa, Portugal"}]},{"given":"Susana","family":"Amorim","sequence":"additional","affiliation":[{"name":"Universidade Lus\u00f3fona, Rua de Augusto Rosa 24, 4000-098 Porto, Portugal"}]},{"given":"H\u00e9lder Fernando Pedrosa","family":"e Sousa","sequence":"additional","affiliation":[{"name":"Department of Mathematics (DM. UTAD), University of Tr\u00e1s-os-Montes and Alto Douro, Quinta de Prados, 5001-801 Vila Real, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2777-2372","authenticated-orcid":false,"given":"Diogo Guedes","family":"Vidal","sequence":"additional","affiliation":[{"name":"UFP Energy, Environment and Health Research Unit (FP-ENAS), University Fernando Pessoa (UFP), Pra\u00e7a 9 de Abril 349, 4249-004 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2198-6740","authenticated-orcid":false,"given":"Maria Alzira Pimenta","family":"Dinis","sequence":"additional","affiliation":[{"name":"UFP Energy, Environment and Health Research Unit (FP-ENAS), University Fernando Pessoa (UFP), Pra\u00e7a 9 de Abril 349, 4249-004 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,1,30]]},"reference":[{"key":"ref_1","unstructured":"Internet World Stats (2019, December 20). World Internet Usage snd Population Statistics 2019 Mid-Year Estimates. 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