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Sleep apnea and Down's syndrome
Ake Dahlqvist1, Eva Rask, Carl-Johan Rosenqvist
1Department of Otorhinolaryngology, University Hospital of Umeå, Umeå, Sweden. ake.dahlqvist@vll.se
Insights
This study found no link between obstructive sleep apnea and Down syndrome in children. While snoring and enlarged tonsils were common, sleep apnea was not more prevalent in children with Down syndrome compared to controls.
Area of Science:
- Pediatric Sleep Medicine
- Genetics and Developmental Disorders
Background:
- Obstructive sleep apnea (OSA) is frequently reported in children with Down syndrome (DS).
- Previous studies were case series of patients referred for suspected sleep apnea, potentially overestimating prevalence.
Purpose of the Study:
- To investigate the relationship between Down syndrome and obstructive sleep apnea in a population-based controlled study.
- To determine if sleep apnea is more common in children with DS compared to their siblings.
Main Methods:
- A population-based study included children aged 2-10 years with Down syndrome and their siblings as controls.
- Overnight sleep apnea recordings and echocardiography were performed on participants.
Main Results:
- Obstructive sleep apnea was not diagnosed in any children with Down syndrome or controls.
- The apnea-hypopnea index did not differ between groups.
- Snoring and tonsil hypertrophy were more common in children with Down syndrome, who also had shorter sleep times and more frequent position changes.
Conclusions:
- Snoring, restless sleep, and tonsil hypertrophy are common in children with Down syndrome.
- This population-based controlled study found no increased risk of obstructive sleep apnea related to Down syndrome.
Objective:
Obstructive sleep apnea has been reported to occur in 20-50% of children with Down's syndrome in case series of patients referred for evaluation of suspected sleep apnea. In this population-based controlled study, we aimed to investigate whether sleep apnea is related to Down's syndrome.
Material And Methods:
Every child aged 2-10 years with Down's syndrome residing in the Umeå healthcare district (n = 28) was invited to participate in the study, with their siblings acting as controls. Successful overnight sleep apnea recordings and echocardiography were performed in 17/21 children with Down's syndrome and in 21 controls.
Results:
Obstructive sleep apnea could not be diagnosed, either in children with Down's syndrome or in the control children. The apnea-hypopnea index in the children with Down's syndrome was 1.2 +/- 1.5 and did not differ from that in controls. Snoring and hypertrophy of the tonsils were more common in children with Down's syndrome than in controls. Children with Down's syndrome slept for a shorter time (p < 0.001) and changed body position more often (p < 0.05) than the control children.
Conclusions:
Snoring, restless sleep and hypertrophy of the tonsils were common among children with Down's syndrome. Obstructive sleep apnea was, however, not related to Down's syndrome in the present population-based controlled study.
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