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A longitudinal study of the circadian phase delay/advance of high school students. (Senior Division).

200 students (100 boys and 100 girls) attending Cherry Creek High School were administered two surveys regarding their sleep behavior. One survey was Mary A. Carskadon's morningness-eveningness questionnaire and the other survey was developed independently for this study to assess the circadian phase of the students' sleep/wake cycles (King Survey). Unlike most other studies on adolescent sleep behavior, this study was done during the summer in order to project the natural sleep behavior of adolescents. The goal was to assess changes in a student's tendency to delay sleep onset and morning awakenings across different grade levels and genders. Those with Delayed Sleep Phase Syndrome (a disorder most common among adolescents) would get a low score in both surveys. According to statistical analysis, the surveys were both reliable. Overall there was a significant trend among males to develop progressive eveningness with increasing grade level and age in both the King and Carskadon surveys. A total of 7% of the students surveyed had DSPS as defined by a score greater than 2 standard deviations below the mean. These results concur with previous repons of the prevalence of DSPS. They also raise the question why males develop progressive eveningness with increasing grade-level.

Eric King, Cherry Creek High School.
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Author:King, Eric
Publication:Journal of the Colorado-Wyoming Academy of Science
Article Type:Brief Article
Geographic Code:1USA
Date:Apr 1, 2002
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