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The current study tested both <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content>\u2010specific (i.e. <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content> symptoms, comorbid anxiety and depression, nightmares and fear of sleep) and insomnia\u2010specific (i.e. dysfunctional beliefs about sleep, insomnia\u2010related safety behaviours and daily stressors) predictors of sleep quality, efficiency and nightmares in a sample of 30 individuals with <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content>. Participants participated in ecological momentary assessment to determine how daily changes in <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content>\u2010 and insomnia\u2010related factors lead to changes in sleep. Multi\u2010level modelling analyses indicated that, after accounting for baseline <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content> symptom severity, <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content>\u2010specific factors were associated with insomnia symptoms, but insomnia\u2010specific factors were not. Only daytime <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content> symptoms and fear of sleep predicted nightmares. Both sleep\u2010 and <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content>\u2010related factors play a role in maintaining insomnia among those with <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content>, while nightmares seem to be linked more closely with only <jats:styled-content style=\"fixed-case\">PTSD<\/jats:styled-content>\u2010related factors.<\/jats:p>","DOI":"10.1111\/jsr.12589","type":"journal-article","created":{"date-parts":[[2017,8,3]],"date-time":"2017-08-03T19:39:54Z","timestamp":1501789194000},"page":"64-72","source":"Crossref","is-referenced-by-count":49,"title":["Predictors of insomnia symptoms and nightmares among individuals with post\u2010traumatic stress disorder: an ecological momentary assessment study"],"prefix":"10.1111","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5857-3800","authenticated-orcid":false,"given":"Nicole A.","family":"Short","sequence":"first","affiliation":[{"name":"Department of Psychology Florida State University Tallahassee FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicholas P.","family":"Allan","sequence":"additional","affiliation":[{"name":"Department of Psychology Ohio University Athens OH USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lauren","family":"Stentz","sequence":"additional","affiliation":[{"name":"Department of Psychology Florida State University Tallahassee FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amberly K.","family":"Portero","sequence":"additional","affiliation":[{"name":"Department of Psychology Florida State University Tallahassee FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norman B.","family":"Schmidt","sequence":"additional","affiliation":[{"name":"Department of Psychology Florida State University Tallahassee FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,8,3]]},"reference":[{"key":"e_1_2_8_2_1","volume-title":"Beck Anxiety Inventory Manual","author":"Beck A. 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