title: Correlates for poor sleepers in a Los Angeles high school.
abstract: OBJECTIVE
  We explored sleep patterns including morning-evening preference and their associations with other lifestyle determinants among high school students.
  
  
  METHODS
  We conducted a cross-sectional survey of students grades 9-12 from a private high school in the United States. One hundred and thirty-one students completed an online survey comprising 23 original, investigator-created questions, a mood scale, the Pittsburgh Sleep Quality Index (PSQI), and the Horne-Ostberg Morningness-Eveningness Questionnaire (MEQ).
  
  
  RESULTS
  We found that 80% of students reported a sleep deficit. As defined by the PSQI, 69% of girls and 58% of boys in this sample were poor sleepers. Eveningness was a strong predictor of poor sleep, particularly among students aged 15 years (odds ratio [OR] 9.92; 95% confidence interval [CI], 1.52-64.8), among whom poor sleep quality was also associated with a higher body mass index (BMI) (OR, 6.97; 95% CI, 1.01-48.2).
  
  
  CONCLUSIONS
  Our pilot study suggests that morningness-eveningness is a strong predictor of sleep quality among high school students.
authors.affiliation: Yale College, Yale University, New Haven, CT, USA.
authors.forename: Sarah P
authors.initials: SP
authors.lastname: Megdal
authors.forename: Eva S
authors.initials: ES
authors.lastname: Schernhammer
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D002940:Circadian Rhythm; D003430:Cross-Sectional Studies; D006970:Disorders of Excessive Somnolence / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008019:Life Style; D016015:Logistic Models; D015141:Los Angeles / Q000453:epidemiology; D008297:Male; D020178:Sleep Disorders, Circadian Rhythm / Q000453:epidemiology*; D013334:Students / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires