{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T11:31:53Z","timestamp":1772796713277,"version":"3.50.1"},"reference-count":0,"publisher":"S. Karger AG","issue":"1","license":[{"start":{"date-parts":[[2023,12,11]],"date-time":"2023-12-11T00:00:00Z","timestamp":1702252800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2023,12,11]],"date-time":"2023-12-11T00:00:00Z","timestamp":1702252800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Eur Addict Res"],"published-print":{"date-parts":[[2024]]},"abstract":"<jats:p>&lt;b&gt;&lt;i&gt;Introduction:&lt;\/i&gt;&lt;\/b&gt; Chronotype describes a person\u2019s preferential activity pattern during a 24-hour period, which may not be in line with their social lifestyle. A mismatch between biological and social time is known as \u201csocial jetlag,\u201d which has negative effects on wellbeing. Cocaine influences a person\u2019s activity levels, but very little is known about possible changes in chronotype of patients with cocaine use disorder (CUD). Here, we aimed to shed light on self-reported changes in chronotype in patients with CUD and the clinical implications. &lt;b&gt;&lt;i&gt;Methods:&lt;\/i&gt;&lt;\/b&gt; A total of 90 men from the local community were recruited; about half of the sample met the criteria for CUD, while the other half were healthy without a personal history of substance use disorder. Participants completed the Munich Chronotype Questionnaire along with questionnaires about mental health, daily fatigue, and drug\/alcohol use. &lt;b&gt;&lt;i&gt;Results:&lt;\/i&gt;&lt;\/b&gt; Half of the CUD patients fell into the category of late chronotype \u2013 a significantly larger proportion than their healthy peers. Late \u201cnight owls\u201d tended to have started using cocaine at an earlier age than other chronotypes; a finding that was not observed with tobacco, cannabis, or alcohol. Drug use severity in CUD patients did not differ across chronotypes. CUD patients (52%) did not have a preferred time of day to use cocaine. The mismatch between social and biological time was significantly greater in CUD patients and unrelated to drug use or mental health status. &lt;b&gt;&lt;i&gt;Conclusion:&lt;\/i&gt;&lt;\/b&gt; CUD appears to be associated with disruptions in chronotype which are, contrary to a widely held view, not reflected by using patterns or addiction severity. <\/jats:p>","DOI":"10.1159\/000535219","type":"journal-article","created":{"date-parts":[[2023,12,11]],"date-time":"2023-12-11T22:00:43Z","timestamp":1702332043000},"page":"23-31","source":"Crossref","is-referenced-by-count":2,"title":["Mismatch of Biological and Social Time in Cocaine-Addicted Men"],"prefix":"10.1159","volume":"30","author":[{"given":"Jeevan","family":"Fernando","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karen D.","family":"Ersche","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2023,12,11]]},"container-title":["European Addiction Research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/karger.com\/ear\/article-pdf\/30\/1\/23\/4164399\/000535219.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/karger.com\/ear\/article-pdf\/30\/1\/23\/4164399\/000535219.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,4,23]],"date-time":"2025-04-23T15:55:20Z","timestamp":1745423720000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000535219"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,12,11]]},"references-count":0,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2024,2,2]]},"published-print":{"date-parts":[[2024,2,2]]}},"URL":"https:\/\/doi.org\/10.1159\/000535219","archive":["Portico"],"relation":{},"ISSN":["1022-6877","1421-9891"],"issn-type":[{"value":"1022-6877","type":"print"},{"value":"1421-9891","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,12,11]]}}}