Gender and temporal differences in sleep-wake patterns in Japanese schoolchildren

Area of Science:

• Pediatrics
• Sleep Medicine
• Adolescent Health

Background:

• Sleep patterns significantly impact adolescent health and academic performance.
• Gender-based differences in sleep are increasingly recognized in pediatric populations.

Purpose of the Study:

• To investigate gender and weekly variations in sleep patterns among Japanese junior high school students.
• To compare objective and subjective sleep quality between boys and girls.

Main Methods:

• A school-based study involving 91 Japanese children aged 13-14 years.
• Sleep patterns were objectively measured using actigraphy (Actiwatch) for seven consecutive days.
• Daily logs and questionnaires supplemented actigraphy data for subjective sleep assessments.

Main Results:

• Girls demonstrated better sleep indicators, including higher sleep efficiency and lower fragmentation index compared to boys.
• Boys experienced later bedtimes on weekends and exhibited more activity during sleep and greater nighttime awakenings.
• Subjective reports indicated higher levels of drowsiness and desire for longer sleep in boys.

Conclusions:

• Japanese junior high school girls generally have better sleep quality than boys, characterized by more efficient and less fragmented sleep.
• Objective findings of poorer sleep in boys are corroborated by their subjective complaints.
• Further research is needed to determine if these sleep disparities are culturally influenced or represent universal gender-specific traits.