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Sleep problems reduced from 6 to 24 months of age with no evidence of links between disturbed sleep and later
Lisbeth Valla1,2, Tore Wentzel-Larsen1,3, Kari Slinning1
1Regional Centre for Child and Adolescent Mental Health, Eastern and Southern Norway (RBUP), Oslo, Norway.
Insights
Infant sleep problems decrease with age, with prevalence dropping from 14.6% at 6 months to 3.3% at 24 months. Early sleep issues did not show clear links to later developmental delays.
Area of Science:
- Pediatric sleep science
- Infant development research
- Child psychology
Background:
- Sleep is crucial for healthy infant development.
- Sleep problems are common in infancy.
- Understanding the long-term impact of infant sleep issues is important.
Purpose of the Study:
- To determine the prevalence of infant sleep problems at 6, 12, and 24 months.
- To investigate the relationship between infant sleep problems and developmental outcomes.
- To assess if sleep problems at 6 months predict changes in development over time.
Main Methods:
- A parent-reported sleep questionnaire was used to identify sleep problems.
- The Ages and Stages Questionnaires (ASQ) measured developmental skills.
- 1555 infants from Norwegian well-baby clinics participated; data analyzed using t-tests and linear mixed-effects models.
Main Results:
- Prevalence of sleep problems decreased with infant age: 14.6% at 6 months, 7.4% at 12 months, and 3.3% at 24 months.
- No significant differences in overall developmental scores (ASQ) were found between infants with and without sleep problems.
- Infants with sleep problems showed faster increases in communication and problem-solving skills.
Conclusions:
- Infant sleep problem prevalence declines significantly from 6 to 24 months.
- Early sleep disturbances do not appear to be clearly linked to later developmental problems.
- Specific developmental areas like communication and problem-solving may show accelerated growth in infants experiencing sleep issues.
Aim:
Sleep is essential for infant development. We assessed the prevalence of sleep problems in infants at 6, 12 and 24 months, investigated the relationship between infants' sleep problems and development, and determined to what extent sleep problems at 6 months were related to changes in the developmental course.
Methods:
Infant sleep problems were measured by a parent-reported sleep questionnaire. The Ages and Stages Questionnaires were used to measure developmental skills in a sample of 1555 infants recruited from 9 well-baby clinics in Norway. ASQ scores were compared between infants with and without sleep problems by using two-sample t-tests. The relationship between infant sleep problems at 6 months and changes in Ages and Stages Questionnaires scores over time was investigated using linear mixed-effects models.
Results:
The prevalence of infant sleep problems were 14.6% at 6 months, 7.4% at 12 months and 3.3% at 24 months. There was no clear evidence of differences in ASQ or ASQ:SE scores by sleep problems from 6 to 24 months, but communication and problem-solving scores for infants with sleep problems increased faster.
Conclusion:
Prevalence of sleep problems decreased with age. There was no clear evidence of early sleep disturbance and later development problems.
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