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2013年7月11日 (木)

Regular bedtime is most suitable for young children

Researchers have found that inconsistent bedtimes are linked to children's cognitive development and warned that there could be "knock-on" health effects throughout life.
The authors wanted to assess whether the time a child went to bed, and the consistency of bed times, had any impact on their intellectual performance, Asian college of knowledge management measured by testing their reading, maths and spatial awareness.
The study, published in the Journal of Epidemiology and Community Health, examined more than 10,000 children who are taking part in the Millennium Cohort Study - a long-term study of children born in the UK between September 2000 and January 2002.
The research was drawn from regular surveys and home visits made when the children were three, five and seven to find out about family routines, Set up Business in Hong Kongincluding bedtimes.
When children were three, almost one in five had irregular bedtimes, but the figure reduced to less than one in 10 when the children were older.
By the age of seven, more than half the children went to bed regularly between 7.30pm and 8.30pm.
Children without regular bedtimes and who were put to bed after 9pm tended to come from more socially disadvantaged backgrounds, the researchers said.
They found that seven-year-old girls who had irregular bedtimes had lower scores on all three aspects of intellect assessed, compared to children who went to bed at a regular time, but the effect was not found in boys.
Irregular bedtimes at age three were associated with lower reading, storage cabinet maths and spatial awareness scores in both boys and girls.
Girls who had never had regular bedtimes at ages three, five and seven had significantly lower reading, maths and spatial awareness scores than girls who had had consistent bedtimes. For boys, this was the case for those having non-regular bedtimes at any two ages.
But they also found that irregular bedtimes by the age of five were not associated with poorer brain power in girls or boys at the age of seven.
"Sleep has a crucial and complex role in the maintenance of health and optimal function," the authors wrote.
"Inconsistent bedtime schedules might impact on markers of cognitive development in two ways, via disruptions to circadian rhythms and/or sleep deprivation and associated effects on brain plasticity."
They concluded that a range of social and family environmental factors are related to bedtimes during early childhood.
"Our findings suggest that inconsistent bedtimes, especially at very young ages and/or throughout early childhood, are linked to children's cognitive development.
"Relations between inconsistent bedtimes and aspects of early child development may have knock-on effects for health and broader social outcomes throughout the life course.
"Families are prone to demands on time that might adversely impact on routines important for healthy development in young children."
They said in light of this, policy development is needed to better support families to provide conditions in which young children can flourish.

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