title: Variations in sleep characteristics and sleep-related impairment in at-risk college drinkers: a latent profile analysis.
abstract: OBJECTIVE
  Sleep disturbance and heavy drinking increase risk of negative consequences in college students. Limited research exists on how they act synergistically, and the overall nature of sleep and sleep-related impairment in college student drinkers is poorly understood. A latent profile analysis was conducted on the sleep characteristics and daytime sleep-related consequences of college student drinkers who were at-risk based on Alcohol Use Disorders Identification Test-Consumption scores.
  
  
  METHODS
  Participants (N = 312, mean age = 18.90 (0.97) years) consumed a mean (SD) of 20.93 (13.04) drinks per week. Scores on the 10 items of the Sleep/Wake Behavior Problems Scale (SWPS) were the class indicators.
  
  
  RESULTS
  Four classes best described the sleep and sleep-related consequences of at-risk college drinkers. Classes represented different gradients and types of sleep patterns and sleep-related impairment; nearly half the sample reported late bedtimes and daytime consequences of insufficient sleep. Subsequent validation analyses indicated that these classes were directly correspondent with severity of alcohol consumption, alcohol-related consequences illicit substance use, and perceived health.
  
  
  CONCLUSIONS
  These findings indicate the presence of significant heterogeneity in college drinkers' sleep patterns and experiences of sleep-related impairment. Class differences significantly impact the level of alcohol and drug use and the consequences members experience. Greater alcohol use and sleep/wake problems are associated with increased risk for negative consequences for certain classes. These results suggest that college drinking interventions could benefit from the incorporation of sleep-related content and the value in adding brief alcohol assessments and interventions to other college health treatments.
authors.affiliation: Department of Psychiatry, Yale University School of Medicine.
authors.forename: Kelly S
authors.initials: KS
authors.lastname: DeMartini
authors.affiliation: Department of Psychiatry, Yale University School of Medicine.
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Fucito
mesh_terms: D000293:Adolescent; D000328:Adult; D019973:Alcohol-Related Disorders / Q000150:complications* / Q000453:epidemiology; D015897:Comorbidity; D006970:Disorders of Excessive Somnolence / Q000150:complications / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D009511:New England / Q000453:epidemiology; D012307:Risk Factors; D012890:Sleep / Q000187:drug effects*; D020178:Sleep Disorders, Circadian Rhythm; D012893:Sleep Wake Disorders / Q000139:chemically induced* / Q000453:epidemiology; D013334:Students / Q000706:statistics & numerical data*; D014495:Universities; D055815:Young Adult