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[Development of nocturnal sleep behaviors in very low birth infants]
1Faculty of Nursing and Rehabilitation, Konan Women's University, Kobe, Hyogo. y_asaka@hs.hokudai.ac.jp
Insights
Preterm infants
Area of Science:
- Neonatal development
- Pediatric sleep medicine
- Developmental pediatrics
Background:
- Preterm infants exhibit distinct developmental trajectories compared to full-term infants.
- Understanding sleep behavior in preterm infants is crucial for their neurodevelopmental outcomes.
- Nocturnal sleep patterns are key indicators of infant health and development.
Purpose of the Study:
- To investigate developmental changes in nocturnal sleep behaviors of preterm infants.
- To compare sleep patterns between preterm and full-term infants.
- To identify age-related sleep maturation in preterm infants.
Main Methods:
- Utilized Actigraph devices for week-long sleep monitoring.
- Included 18 preterm infants and 23 full-term infants.
- Analyzed sleep duration and activity levels (ACTX) based on corrected age.
Main Results:
- Nocturnal sleep duration in preterm infants caught up to full-term infants after 13 corrected months.
- Preterm infants showed a significantly higher percentage of activity during nighttime (ACTX) across age groups.
- Sleep duration varied significantly with corrected age only in the preterm group.
Conclusions:
- Preterm infants' nocturnal sleep duration normalizes by 13 corrected months.
- Preterm infants experience less restful nighttime sleep, indicated by higher activity levels.
- Further research is needed to explore the developmental aspects of nighttime physical activity in preterm infants.
Abstract:
The objective of this study is to identify the developmental changes in nocturnal sleep behaviors among preterm infants in comparison with full-term infants (control group). The subjects were 18 preterm infants and 23 full-term infants with mean gestational weeks of 26.5 +/- 2.3 and 39.1 +/- 1.3, and average weights of 879 +/- 188 g and 2,940 +/- 352 g, respectively. Sleep measures were obtained through Actigraph (Micro-mini RC, Ambulatory Monitoring Inc., Ardsley, NY) over a week-long period. Results showed that the sleep duration was significantly different depending on the corrected age of months in only the preterm group (Preterm group: 504 +/- 55 min in under 12 months group, 543 +/- 68 min in over 13 months group. Full-term group: 548 +/- 68 min in under 12 months group, 544 +/- 79 min in over 13 months group). ACTX (percentage of minutes with higher than 0 activity score) was significantly higher for the preterm infants at both age groups in months. In conclusion, the nocturnal sleep duration of preterm infants reached the same level as those of full-term infants after the age of 13 corrected months. Also preterm infants were found to have a higher percentage of less restful sleep during nighttime. Further research is needed to understand the developmental course of physical activity during night time of preterm infants.
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