{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T19:54:11Z","timestamp":1789156451359,"version":"build-2803163510"},"reference-count":39,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2021,8,4]],"date-time":"2021-08-04T00:00:00Z","timestamp":1628035200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Sleep Research"],"published-print":{"date-parts":[[2022,2]]},"abstract":"<jats:title>Summary<\/jats:title>\n                  <jats:p>\n                    Circadian dysregulation and depressed mood commonly co\u2010occur in young people, yet mechanisms linking Delayed Sleep\u2013Wake Phase disorder (DSWPD) with depression are poorly understood. The present study aimed to examine the role of repetitive negative thinking (RNT), by comparing sleep, RNT and depressive symptomology between 40 \u2018good\u2019 sleeping young people and 63 with DSWPD, with (\n                    <jats:italic>n<\/jats:italic>\n                    \u00a0=\u00a030) and without (\n                    <jats:italic>n<\/jats:italic>\n                    =\u00a033) self\u2010reported doctor\u2010diagnosed depression. Secondary analysis from a randomised controlled trial was also undertaken to observe changes in depressive symptoms and RNT as a result of treatment for DSWPD. The 60 young people with DSWPD (mean [\n                    <jats:italic>SD<\/jats:italic>\n                    ] age of 15.9\u00a0[2.2]\u00a0years, 63% female) received either short (green) or long (red) wavelength bright light therapy (BLT) over 3\u00a0weeks. Cross\u2010sectional baseline comparisons revealed an escalating pattern of worse sleep, more RNT and higher depressed mood scores in the DSWPD young people compared to good sleepers. Across all participants, RNT accounted for the associations between sleep\u2010onset difficulties and depressed mood at baseline. Symptoms of depression, RNT and sleep onset difficulties in DSWPD individuals significantly improved after treatment (\n                    <jats:italic>d\u00a0<\/jats:italic>\n                    =\u00a00.47\u20130.65) and at the 1\u2010 (\n                    <jats:italic>d\u00a0<\/jats:italic>\n                    =\u00a00.43\u20131.00) and 3\u2010month follow\u2010up (\n                    <jats:italic>d\u00a0<\/jats:italic>\n                    =\u00a00.39\u20131.38), yet there were no differences between short\u2010 and long\u2010wavelength BLT. Results provide preliminary evidence that RNT may link delayed sleep phase with depression. BLT conferred sleep benefits, but also improvements in depressed mood and RNT, and thus represents a potentially cost\u2010effective strategy for young people experiencing delayed sleep phase and low mood.\n                  <\/jats:p>","DOI":"10.1111\/jsr.13452","type":"journal-article","created":{"date-parts":[[2021,8,4]],"date-time":"2021-08-04T22:44:58Z","timestamp":1628117098000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Depressed mood and repetitive negative thinking in Delayed Sleep\u2013Wake Phase Disorder: Treatment effects and a comparison with good sleepers"],"prefix":"10.1111","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9425-2337","authenticated-orcid":false,"given":"Cele","family":"Richardson","sequence":"first","affiliation":[{"name":"School of Psychological Science Centre for Sleep Science University of Western Australia Perth WA Australia"},{"name":"Centre for Emotional Health Macquarie University Sydney NSW Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Gradisar","sequence":"additional","affiliation":[{"name":"College of Education, Psychology and Social Work Flinders University Adelaide SA Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,8,4]]},"reference":[{"key":"e_1_2_15_2_1","doi-asserted-by":"publisher","DOI":"10.1037\/a0022796"},{"key":"e_1_2_15_3_1","doi-asserted-by":"publisher","DOI":"10.1093\/sleep\/22.1.95"},{"key":"e_1_2_15_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cpr.2009.11.004"},{"key":"e_1_2_15_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jad.2016.03.016"},{"key":"e_1_2_15_6_1","volume-title":"International Classification of Sleep Disorders: Diagnostic and coding manual","author":"American Academy of Sleep Medicine","year":"2014"},{"key":"e_1_2_15_7_1","doi-asserted-by":"publisher","DOI":"10.1176\/appi.books.9780890425596"},{"issue":"4","key":"e_1_2_15_8_1","first-page":"237","article-title":"Development of a short questionnaire for use in epidemiological studies of depression in children and adolescents","volume":"5","author":"Angold A.","year":"1995","journal-title":"International Journal of Methods in Psychiatric Research"},{"key":"e_1_2_15_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.copsyc.2019.09.002"},{"key":"e_1_2_15_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cpr.2018.05.006"},{"key":"e_1_2_15_11_1","first-page":"188","article-title":"Sleep anticipatory anxiety questionnaire: a measure of anxiety about sleep","volume":"23","author":"Bootzin R.","year":"1994","journal-title":"Sleep Research"},{"key":"e_1_2_15_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.adolescence.2018.06.001"},{"key":"e_1_2_15_13_1","doi-asserted-by":"publisher","DOI":"10.1080\/15402002.2014.981817"},{"key":"e_1_2_15_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10964-012-9811-6"},{"key":"e_1_2_15_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.euroneuro.2011.07.007"},{"key":"e_1_2_15_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.smrv.2018.09.004"},{"key":"e_1_2_15_17_1","doi-asserted-by":"publisher","DOI":"10.5665\/sleep.1432"},{"key":"e_1_2_15_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jaac.2018.04.020"},{"key":"e_1_2_15_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.sleep.2013.09.014"},{"key":"e_1_2_15_20_1","volume-title":"A handbook of statistical analyses using SPSS","author":"Landau S.","year":"2004"},{"key":"e_1_2_15_21_1","doi-asserted-by":"publisher","DOI":"10.1001\/archgenpsychiatry.2010.183"},{"key":"e_1_2_15_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.smrv.2014.03.006"},{"key":"e_1_2_15_23_1","doi-asserted-by":"publisher","DOI":"10.5664\/jcsm.2998"},{"key":"e_1_2_15_24_1","doi-asserted-by":"publisher","DOI":"10.1080\/07420528.2016.1220386"},{"issue":"1","key":"e_1_2_15_25_1","first-page":"zsw002","article-title":"Prevalence of circadian misalignment and its association with depressive symptoms in delayed sleep phase disorder","volume":"40","author":"Murray J. 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