title: Reliability of a Scale Assessing Depressed Mood in the Context of Sleep.
abstract: The current study assessed the reliability of Kandel & Davies mood scale with and without sleep-related items. 178 Brown University first-year students (mean age=18.1 years; 108 females) completed online biweekly surveys after weeks 2, 6, 8, and 10 and on 2 consecutive days after weeks 4 and 12 of their first semester. The scale was examined as a 1) full 6-item scale, 2) 5-item scale excluding the sleep item, and 3) 4-item scale excluding the sleep and tired items. Intraclass correlations (ICC) values for consecutive-day assessments and 6 biweekly surveys were similar and not a function of the weeks evaluated. Total-item correlations and inter-measure correlations with the Center for Epidemiologic Studies - Depressed Mood Scale (CES-D) supported the removal of the sleep-related items from the 6-item scale. These analyses confirm the reliability of the original Kandel and Davies depressed mood scale as well as without the sleep-related items.
authors.affiliation: University of North Texas Health Science Center, Fort Worth, TX, United States ; Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, United States ; Sleep for Science Research Laboratory of Brown University, Providence, RI, United States.
authors.forename: Brandy M
authors.initials: BM
authors.lastname: Roane
authors.affiliation: Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, United States ; E.P. Bradley Hospital, Providence, RI, United States.
authors.forename: Ronald
authors.initials: R
authors.lastname: Seifer
authors.affiliation: Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, United States ; Sleep for Science Research Laboratory of Brown University, Providence, RI, United States ; Department of Medicine, Warren Alpert Medical School of Brown University, Providence, RI, United States.
authors.forename: Katherine M
authors.initials: KM
authors.lastname: Sharkey
authors.affiliation: Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, United States ; Sleep for Science Research Laboratory of Brown University, Providence, RI, United States ; E.P. Bradley Hospital, Providence, RI, United States.
authors.forename: Eliza
authors.initials: E
authors.lastname: Van Reen
authors.affiliation: Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, United States.
authors.forename: Tamara L Y
authors.initials: TL
authors.lastname: Bond
authors.affiliation: Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, United States ; Sleep for Science Research Laboratory of Brown University, Providence, RI, United States ; Psychiatry Department and Center for Investigation and Research in Sleep (CIRS), Lausanne University Hospital (CHUV), Switzerland.
authors.forename: Tifenn
authors.initials: T
authors.lastname: Raffray
authors.affiliation: Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, United States ; Sleep for Science Research Laboratory of Brown University, Providence, RI, United States ; E.P. Bradley Hospital, Providence, RI, United States.
authors.forename: Mary A
authors.initials: MA
authors.lastname: Carskadon
keywords: depressed mood scale; insomnia; mood; reliability; sleep