Age-and Sex-Related Differences in Sleep Patterns Among Korean Young Children
2018
Kim, J., Myongji University, Seoul, Republic of Korea | Park, Y., Pusan National University, Busan, Republic of Korea
The present study examined the age- and sex-related differences in the sleep patterns among Korean children aged between 2 and 5 years (N = 1,413). Data on the children's bedtime, wake time, nap duration and nighttime sleep duration were drawn from a larger dataset collected by the Korean Institute for Child-Rearing Policy (KICP). The findings indicated that the children's bedtime and wake time shifted gradually to earlier times with increasing age. Their 24h nap duration and total sleep duration shortened dramatically with age, whereas the nighttime sleep increased then decreased to a modest degree. Although boys showed earlier wake times and shorter nighttime sleep than girls at all ages, boys did not show a shorter total sleep than girls until the age of 4 years, after which the majority of children began the single-phasic sleep/wake pattern. At all ages, a considerable proportion of children exhibited a shorter 24h total sleep duration than the recommended total sleep duration. The results suggest that Korean young children may undergo sleep deficiency and an acute reduction of naps while they move from a bi-phasic to single-phasic sleep/wake pattern.
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