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The sleep/wake cycle in 4- to 14-month old children: general aspects and sex differences
L Menna-Barreto1, H Montagner, R Soussignan
1Departamento de Fisiologia e Biofisica, Universidade de São Paulo, Brasil.
Insights
As infants grow, their total sleep time decreases. After 10 months of age, girls tend to sleep more than boys, indicating a sex-based difference in infant sleep patterns.
Area of Science:
- Pediatrics
- Developmental Psychology
- Sleep Medicine
Background:
- Infant sleep patterns are crucial for development.
- Understanding age-related and sex-related variations in sleep is important for pediatric care.
Purpose of the Study:
- To analyze total sleep time in infants aged 4 to 14 months.
- To investigate age-related changes in sleep duration.
- To examine potential sex differences in infant sleep patterns.
Main Methods:
- Continuous 24-hour observation and recording of sleep/wake cycles.
- Study involved 39 children aged 4 to 14 months.
- Data collected over a 4-month period, one week per month.
Main Results:
- Total sleep time decreased with increasing age in the overall infant population.
- A differential effect was observed between sexes: girls tended to sleep more than boys after 10 months of age.
Conclusions:
- Infant total sleep time naturally declines as they age.
- Sex-based differences in sleep duration emerge in infants after 10 months of age, with girls sleeping more.
Abstract:
The sleep/wake cycle of 39 children, 4 to 14 months of age was observed and recorded continuously (24 h per day) over a 4-month period, one full week per month, from November 1986 through February 1987. Total sleep time per day was analyzed for the different age groups and for the two sexes. A decrease in total sleep time is shown as a function of increasing age for the whole population. Analyzing boys and girls separately, a differential effect on total sleep time was demonstrated, girls tending to sleep more after 10 months of age.