Li, AoChen, SitengQuan, StuartSilva, Graciela E.Ackerman, CharlottePowers, Linda S.Roveda, Janet M.Perfect, Michelle M.2020-05-292020-03Li, Ao, Siteng Chen, Stuart F Quan, Graciela E Silva, Charlotte Ackerman, Linda S Powers, Janet M Roveda, and Michelle M Perfect. 2020. "Sleep Patterns and Sleep Deprivation Recorded by Actigraphy in 4th-grade and 5th-grade Students." Sleep Medicine 67 : 191-99.1389-9457http://nrs.harvard.edu/urn-3:HUL.InstRepos:42668878Highlight • Approximately two-thirds of 4th- and 5th-grade elementary students sleep less than 9 hours per night. • Differences in sleep patterns exist between weekdays and weekends. • Sleep deprivation is more severe in 5th-grade studentsObjective: This study investigates sleep patterns of 4th- and 5th-grade students using actigraphy. Methods: The study included 257 students enrolled in a Southwestern US school district who participated in a novel sleep science curriculum during the Spring 2016-17 and Fall 2017-18 semesters and met the study inclusion criteria. As part of this curriculum, participants underwent 5 to 7 days of continuous wrist actigraphy and completed an online sleep diary. Results: Approximately two-thirds of the 9-11-year-old 4th- and 5th-grade students slept less than the minimum 9 hours per night recommended by both the American Academy of Sleep Medicine/Sleep Research Society and the National Sleep Foundation. The sleep midpoint time on weekends was about 1 hour later than on weekdays. There was a significant effect of age on sleep duration. Compared to 9-year old students, a larger proportion of 10-year old students had a sleep duration less than 8.5 hours. Boys had shorter sleep duration than girls, and a larger percentage of boys obtained less than 9 hours of sleep compared to girls. Conclusions: Insufficient sleep is a highly prevalent condition among 9-11-year-old 4th- and 5th-grade elementary students. Importantly, there is a difference between sleep patterns on weekdays and weekends which may portend greater problems with sleep in adolescence and young adulthood.en-USGeneral MedicineActigraphyChildrenSchool ageSleep patternsSleep deprivationJournal Article2020-05-2910.1016/j.sleep.2019.12.001