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Sleep disturbances are prevalent in individuals with ANSD and have independently been linked to both eating disorder (ED) symptom severity and suicidal ideation (SI), yet their temporal role in maintaining ANSD symptoms and SI remains poorly understood. This study examined sleep disturbances as a potential shared, transdiagnostic mechanism contributing to daily fluctuations in ANSD symptoms and SI.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Method<\/jats:title>\n                    <jats:p>\n                      Participants meeting diagnostic criteria for ANSD with current or past SI (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009128) completed daily ecological momentary assessment (EMA) surveys assessing sleep disturbances, ED symptoms, and SI. Analyses and hypotheses were pre\u2010registered.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Multilevel models tested within\u2010 and between\u2010person, temporally lagged, bidirectional associations among sleep disturbances, ANSD symptoms, and SI. Greater sleep disturbances predicted increased next\u2010day restriction, binge eating, compensatory behaviors, body checking, and SI. Bidirectional effects were also observed, such that elevations in restriction, binge eating, compensatory behaviors, body checking, and SI predicted greater sleep disturbances the following night.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>These findings suggest that sleep disturbances are dynamically embedded in the daily maintenance of core ANSD symptoms and SI. Sleep may represent a shared, modifiable vulnerability process contributing to ANSD severity and SI, highlighting its potential as a transdiagnostic intervention target in both eating disorder treatment and suicide prevention.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/eat.70234","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T04:25:31Z","timestamp":1791260731000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Momentary Temporal Associations Among Sleep Disturbances, Eating Disorder Behaviors, and Suicidal Ideation in Anorexia Nervosa Spectrum Disorders"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-2832-394X","authenticated-orcid":false,"given":"Sara I.","family":"Buseman","sequence":"first","affiliation":[{"name":"Department of Psychological &amp; Brain Sciences University of Louisville  Louisville Kentucky USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4148-6927","authenticated-orcid":false,"given":"Elizabeth D.","family":"Cash","sequence":"additional","affiliation":[{"name":"Department of Psychological &amp; Brain Sciences University of Louisville  Louisville Kentucky USA"},{"name":"Department of Otolaryngology, Head and Neck Surgery &amp; Communication Disorders University of Louisville School of Medicine  Louisville Kentucky USA"},{"name":"Brown Cancer Center University of Louisville Health  Louisville Kentucky USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-8758-7685","authenticated-orcid":false,"given":"April R.","family":"Smith","sequence":"additional","affiliation":[{"name":"Department of Psychological Sciences Auburn University  Auburn Alabama USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8098-6943","authenticated-orcid":false,"given":"Cheri A.","family":"Levinson","sequence":"additional","affiliation":[{"name":"Department of Psychological &amp; Brain Sciences University of Louisville  Louisville Kentucky USA"},{"name":"Department of Pediatrics, Division of Child and Adolescent Psychiatry and Psychology University of Louisville  Louisville Kentucky USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,5]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11920\u2010016\u20100728\u20108"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.3390\/brainsci11091163"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1037\/bne0000128"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1176\/appi.books.9780890425596"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1080\/10640266.2023.2196492"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.eatbeh.2015.12.008"},{"key":"e_1_2_12_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.appet.2025.108052"},{"key":"e_1_2_12_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpsychores.2023.111437"},{"key":"e_1_2_12_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jml.2012.11.001"},{"key":"e_1_2_12_11_1","doi-asserted-by":"publisher","DOI":"10.18637\/jss.v067.i01"},{"key":"e_1_2_12_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jad.2020.12.150"},{"key":"e_1_2_12_13_1","doi-asserted-by":"publisher","DOI":"10.1017\/s0954579405050145"},{"key":"e_1_2_12_14_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12888\u2010022\u201003716\u20106"},{"key":"e_1_2_12_15_1","doi-asserted-by":"publisher","DOI":"10.1002\/erv.3148"},{"key":"e_1_2_12_16_1","doi-asserted-by":"publisher","DOI":"10.1002\/eat.24540"},{"key":"e_1_2_12_17_1","doi-asserted-by":"publisher","DOI":"10.1002\/eat.23009"},{"key":"e_1_2_12_18_1","doi-asserted-by":"publisher","DOI":"10.31390\/gradschool_disstheses.4977"},{"key":"e_1_2_12_19_1","doi-asserted-by":"publisher","DOI":"10.3389\/fpsyg.2018.02145"},{"key":"e_1_2_12_20_1","doi-asserted-by":"publisher","DOI":"10.1002\/eat.23758"},{"key":"e_1_2_12_21_1","article-title":"Eating Disorder Examination Questionnaire (EDE\u2010Q)","author":"Fairburn C. 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