title: What Role Does Sleep Play in Weight Gain in the First Semester of University?
abstract: We hypothesized that shorter sleep durations and greater variability in sleep patterns are associated with weight gain in the first semester of university. Students (N = 132) completed daily sleep diaries for 9 weeks, completed the MEQ (chronotype) and CES-D (depressed mood) at week 9, and self-reported weight/height (weeks 1 & 9). Mean and variability scores were calculated for sleep duration (TST, TSTv), bedtime (BT, BTv), and wake time (WT, WTv). An initial hierarchical regression evaluated (block 1) sex, ethnicity; (block 2) depressed mood, chronotype; (block 3) TST; (block 4) BT, WT; and (block 5; R(2) change = 0.09, p = 0.005) TSTv, BTv, WTv with weight change. A sex-by-TSTv interaction was found. A final model showed that ethnicity, TST, TSTv, and BTv accounted for 31% of the variance in weight change for males; TSTv was the most significant contributor (R(2) change = 0.21, p < 0.001). Daily variability in sleep duration contributes to males' weight gain. Further investigation needs to examine sex-specific outcomes for sleep and weight.
authors.affiliation: a Department of Internal Medicine University of North Texas Health Science Center , Fort Worth.|b Department of Psychiatry and Human Behavior Alpert Medical School of Brown University.|c Sleep for Science Research Laboratory Brown University.
authors.forename: Brandy M
authors.initials: BM
authors.lastname: Roane
authors.affiliation: b Department of Psychiatry and Human Behavior Alpert Medical School of Brown University.|d E. P. Bradley Hospital , Providence.
authors.forename: Ronald
authors.initials: R
authors.lastname: Seifer
authors.affiliation: c Sleep for Science Research Laboratory Brown University.|e Department of Medicine , Alpert Medical School of Brown University.
authors.forename: Katherine M
authors.initials: KM
authors.lastname: Sharkey
authors.affiliation: b Department of Psychiatry and Human Behavior Alpert Medical School of Brown University.|c Sleep for Science Research Laboratory Brown University.|d E. P. Bradley Hospital , Providence.
authors.forename: Eliza
authors.initials: E
authors.lastname: Van Reen
authors.affiliation: c Sleep for Science Research Laboratory Brown University.
authors.forename: Tamara L Y
authors.initials: TL
authors.lastname: Bond
authors.affiliation: b Department of Psychiatry and Human Behavior Alpert Medical School of Brown University.|c Sleep for Science Research Laboratory Brown University.|f Psychiatry Department and Center for Investigation and Research in Sleep Lausanne University Hospital.
authors.forename: Tifenn
authors.initials: T
authors.lastname: Raffray
authors.affiliation: b Department of Psychiatry and Human Behavior Alpert Medical School of Brown University.|c Sleep for Science Research Laboratory Brown University.|d E. P. Bradley Hospital , Providence.|g Centre for Sleep Research, Department of Psychology, Social Work, and Social Policy University of South Australia.
authors.forename: Mary A
authors.initials: MA
authors.lastname: Carskadon
mesh_terms: D000293:Adolescent; D003863:Depression; D005006:Ethnicity; D005260:Female; D006801:Humans; D008297:Male; D057566:Self Report; D012727:Sex Characteristics; D012890:Sleep / Q000502:physiology*; D013334:Students / Q000523:psychology; D011795:Surveys and Questionnaires; D013997:Time Factors; D014495:Universities; D015430:Weight Gain / Q000502:physiology*; D055815:Young Adult