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.