title: Adequate sleep moderates the prospective association between alcohol use and consequences.
abstract: Inadequate sleep and heavy alcohol use have been associated with negative outcomes among college students; however, few studies have examined the interactive effects of sleep and drinking quantity in predicting alcohol-related consequences. This study aimed to determine if adequate sleep moderates the prospective association between weekly drinking quantity and consequences.
  
  
  
  College students (N=568) who were mandated to an alcohol prevention intervention reported drinks consumed per week, typical sleep quantity (calculated from sleep/wake times), and perceptions of sleep adequacy as part of a larger research trial. Assessments were completed at baseline and one-, three-, and five-month follow-ups.
  
  
  
  Higher baseline quantities of weekly drinking and inadequate sleep predicted alcohol-related consequences at baseline and one-month follow-up. Significant interactions emerged between baseline weekly drinking quantity and adequate sleep in the prediction of alcohol-related consequences at baseline, one-, three-, and five-month assessments. Simple slopes analyses revealed that weekly drinking quantity was positively associated with alcohol-related consequences for those reporting both adequate and inadequate sleep, but this association was consistently stronger among those who reported inadequate sleep.
  
  
  
  Subjective evaluation of sleep adequacy moderates both the concurrent and prospective associations between weekly drinking quantity and consequences, such that heavy-drinking college students reporting inadequate sleep experience more consequences as a result of drinking. Research needs to examine the mechanism(s) by which inadequate sleep affects alcohol risk among young adults.
authors.affiliation: Center for Alcohol and Addiction Studies, Brown University School of Public Health, Box G-S121-5, Providence, RI 02912, United States; Department of Behavioral and Social Sciences, Brown University School of Public Health, Box G-S121-5, Providence, RI 02912, United States. Electronic address: millerme04@gmail.com.
authors.forename: Mary Beth
authors.initials: MB
authors.lastname: Miller
authors.affiliation: Center for Alcohol and Addiction Studies, Brown University School of Public Health, Box G-S121-5, Providence, RI 02912, United States; Department of Behavioral and Social Sciences, Brown University School of Public Health, Box G-S121-5, Providence, RI 02912, United States.
authors.forename: Angelo M
authors.initials: AM
authors.lastname: DiBello
authors.affiliation: College of Arts and Sciences, Maryville University, St. Louis, MO 63141, United States.
authors.forename: Sarah A
authors.initials: SA
authors.lastname: Lust
authors.affiliation: Department of Behavioral and Social Sciences, Brown University School of Public Health, Box G-S121-5, Providence, RI 02912, United States; Centers for Behavioral and Preventive Medicine, The Miriam Hospital, Providence, RI 02906, United States; Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI 02912, United States.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Carey
authors.affiliation: Center for Alcohol and Addiction Studies, Brown University School of Public Health, Box G-S121-5, Providence, RI 02912, United States; Department of Behavioral and Social Sciences, Brown University School of Public Health, Box G-S121-5, Providence, RI 02912, United States.
authors.forename: Kate B
authors.initials: KB
authors.lastname: Carey
mesh_terms: D000328:Adult; D000067292:Alcohol Drinking in College / Q000523:psychology*; D000437:Alcoholism / Q000453:epidemiology* / Q000523:psychology*; D015897:Comorbidity; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009511:New England / Q000453:epidemiology; D011446:Prospective Studies; D012306:Risk; D012890:Sleep; D012892:Sleep Deprivation / Q000453:epidemiology* / Q000523:psychology*; D013334:Students / Q000523:psychology / Q000706:statistics & numerical data; D014495:Universities; D055815:Young Adult
keywords: Alcohol; College students; Drinking; Intervention; Sleep