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Updated: Aug 19, 2026

Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
Published on: October 2, 2019
Factors associated with fragmented sleep at night across early childhood
Evelyne Touchette1, Dominique Petit, Jean Paquet
1Sleep Disorders Center, Montreal Sacré-Coeur Hospital, Montreal, Quebec, Canada.
Insights
Parental behaviors significantly impact infant sleep consolidation. Feeding after waking at 5 months and parental presence at 17-29 months were linked to fragmented sleep, suggesting early intervention potential.
Area of Science:
- Developmental Pediatrics
- Sleep Medicine
- Child Psychology
Background:
- Sleep consolidation, the ability to sleep for extended periods, is crucial for infant development.
- Fragmented sleep in early childhood can have long-term implications for both child and family.
- Understanding factors influencing sleep patterns is essential for promoting healthy sleep habits.
Purpose of the Study:
- To identify key factors associated with insufficient consecutive nighttime sleep in infants at 5, 17, and 29 months.
- To investigate the relationship between parental behaviors and infant sleep consolidation across early childhood.
Main Methods:
- Utilized a randomized survey design with a representative sample of 1741 infants in Quebec, Canada.
- Collected data through home interviews and questionnaires administered to mothers.
- Assessed consecutive nighttime sleep duration and associated factors using a cross-sectional design at 5, 17, and 29 months.
Main Results:
- At 5 months, 23.5% of infants slept less than 6 consecutive hours.
- Feeding after awakening was the strongest predictor of fragmented sleep at 5 months.
- Parental presence until sleep onset was the most significant factor associated with fragmented sleep at 17 and 29 months.
Conclusions:
- Infant sleep consolidation progresses rapidly during early childhood.
- Parental actions at bedtime and during night awakenings strongly influence sleep consolidation.
- Bidirectional effects between parental behavior and infant sleep may lead to persistent issues, highlighting the need for early interventions.
Objective:
To identify the factors most strongly associated with sleeping less than 6 consecutive hours at night for children aged 5, 17, and 29 months.
Design, Setting, And Participants:
A randomized survey design used a representative sample of infants born in 1997-1998 in the Canadian province of Quebec. Data were collected by questionnaires and interviews. Interviews were scheduled at home with the mothers. The number of consecutive hours slept at night by 1741 children aged 5, 17, and 29 months was assessed from parental reports. Factors associated with fragmented sleep were investigated for each age in a cross-sectional design.
Results:
At 5 months of age, 23.5% of children did not sleep 6 consecutive hours. Of the children who did not sleep 6 consecutive hours at night at 5 months or 17 months of age, 32.9% were still not sleeping 6 consecutive hours at night at 29 months of age. The factor most strongly associated with not sleeping at least 6 consecutive hours per night at 5 months of age was feeding the child after an awakening. Parental presence until sleep onset was the factor most strongly associated with not sleeping at least 6 consecutive hours per night at 17 months and 29 months of age.
Conclusions:
Sleep consolidation evolves rapidly in early childhood. Parental behaviors at bedtime and in response to a nocturnal awakening are highly associated with the child's sleep consolidation. The effects are probably bidirectional and probably create a long-term problem. Early interventions could possibly break the cycle.
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