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Yu MWL, Au CT, Yuen HM, Chan NY, Chan JW, Wing YK, Li AM, Chan KCC. Effects of childhood obstructive sleep apnea with and without daytime sleepiness on behaviors and emotions. Sleep Med 2024; 115:93-99. [PMID: 38350308 DOI: 10.1016/j.sleep.2024.01.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 01/26/2024] [Accepted: 01/26/2024] [Indexed: 02/15/2024]
Abstract
OBJECTIVE To investigate the relationship between obstructive sleep apnea (OSA) with and without excessive daytime sleepiness (EDS) and behavioral and emotional outcomes in non-obese prepubertal children. METHODS This was a retrospective analysis of children aged 5-11 years who presented to our unit for assessment of their sleep-related complaints. All children underwent polysomnography (PSG). They also completed the Pediatric Daytime Sleepiness Scale (PDSS) and a sleep diary. OSA was diagnosed if the obstructive apnea-hypopnea index (OAHI) was ≥1 event/hour. EDS was defined as PDSS >15. Behavioral and emotional outcomes were assessed using the Child Behavioral Checklist (CBCL). RESULTS Data from 391 children (mean age of 8.6 ± 1.7 years; 67 % male) were analyzed. Seventy children did not have OSA or EDS, 137 had OSA, 50 had reported having EDS but without OSA, and 134 children had both OSA and EDS. There were significantly higher CBCL total problems score in the combined group (61 ± 9) compared to the non-OSA/EDS group (54 ± 10), and the OSA-only group (54 ± 10) (p < 0.001). The presence of EDS was significantly associated with higher CBCL T score and higher odds for clinically significant behavioral problems (T score ≥65) after adjusting for age, sex, BMI z-score and average sleep duration (p < 0.001). CONCLUSION Excessive daytime sleepiness is an important contributory factor associated with suboptimal behavioral and emotional outcomes in children with OSA.
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Affiliation(s)
- Michelle Wai-Ling Yu
- Department of Paediatrics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Chun-Ting Au
- Department of Paediatrics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; Translational Medicine, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Hoi-Man Yuen
- Department of Paediatrics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ngan-Yin Chan
- Li Chiu Kong Family Sleep Assessment Unit, Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Joey Wy Chan
- Li Chiu Kong Family Sleep Assessment Unit, Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yun-Kwok Wing
- Li Chiu Kong Family Sleep Assessment Unit, Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Albert Martin Li
- Department of Paediatrics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; Laboratory for Paediatric Respiratory Research, Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; Hong Kong Hub of Paediatric Excellence, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kate Ching-Ching Chan
- Department of Paediatrics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; Laboratory for Paediatric Respiratory Research, Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; Hong Kong Hub of Paediatric Excellence, The Chinese University of Hong Kong, Hong Kong SAR, China.
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Ma D, Wu Y, Wang C, Zhao F, Xu Z, Ni X. Characteristics of ADHD Symptoms and EEG Theta/Beta Ratio in Children With Sleep Disordered Breathing. Clin EEG Neurosci 2024:15500594241234828. [PMID: 38403954 DOI: 10.1177/15500594241234828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Objectives. This study aimed to explore parent-reported symptoms of attention deficit-hyperactivity disorder (ADHD) and sleep electroencephalogram (EEG) theta/beta ratio (TBR) characteristics in children with sleep disordered breathing (SDB). Methods. The parents of children (aged 6-11 years) with SDB (n = 103) and healthy controls (n = 28) completed the SNAP-IV questionnaire, and children underwent overnight polysomnography. Children with SDB were grouped according to obstructive apnea/hypopnea index: primary snoring, mild, and moderate-severe obstructive sleep apnea (OSA) groups. The TBR in non-rapid eye movement (NREM) periods in three sleep cycles was analyzed. Results. Children with SDB showed worse ADHD symptoms compared with the healthy control. There was no intergroup difference in TBR. The time-related decline in TBR observed in the control, primary snoring and mild OSA groups, which was not observed in the moderate-severe OSA group. Overnight transcutaneous oxygen saturation was negatively associated with the hyperactivity/impulsivity score of ADHD symptom. The global TBR during the NREM period in the first sleep cycle was positively correlated with inattention score. Conclusion. Children with SDB showed more ADHD inattention symptoms than the healthy control. Although we found no difference in TBR among groups, we found significant main effect for NREM period. There existed a relationship between hypoxia, TBR, and scores of ADHD symptoms. Hence, it was speculated that TBR can reflect the nocturnal electrophysiological manifestations in children with SDB, which may be related to daytime ADHD symptoms.
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Affiliation(s)
- Dandi Ma
- Department of Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Yunxiao Wu
- Beijing Key Laboratory of Pediatric Otolaryngology, Head & Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Changming Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Fujun Zhao
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Zhifei Xu
- Department of Respiratory Medicine, Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Xin Ni
- Department of Otolaryngology, Head and Neck Surgery, Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
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Horne RS, Shetty M, Vandeleur M, Davey MJ, Walter LM, Nixon GM. Assessing sleep in children with Down syndrome: Comparison of parental sleep diaries, actigraphy and polysomnography. Sleep Med 2023; 107:309-315. [PMID: 37271108 DOI: 10.1016/j.sleep.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/24/2023] [Accepted: 05/02/2023] [Indexed: 06/06/2023]
Abstract
BACKGROUND This study compared measurements of sleep and wake assessed with actigraphy, sleep diary and polysomnography in children with Down syndrome (DS) and also compared measures of actigraphic sleep recording in children with DS and typically developing (TD) children. METHODS Children with DS aged 3-19 years (N = 44) referred for assessment of sleep disordered breathing (SDB) underwent overnight polysomnography, together with 1 week of actigraphy with sleep diary. Actigraphy data from the children with DS were compared with data collected from TD children, matched for age and sex. RESULTS 22 children (50%) with DS completed >3 consecutive nights of actigraphy with a matched sleep diary. There were no differences between bedtimes, wake times or time in bed on weeknights, weekends or over 7 nights between actigraphy and sleep diary. Total sleep time was over estimated by the sleep diary by almost 2 h and the number of night awakenings under-reported. Compared to matched TD children (N = 22), there was no difference in total sleep time, however children with DS fell asleep more quickly (p < 0.001), had more awakenings (p = 0.001) and more time awake after sleep onset (p = 0.007). Children with DS exhibited less variability in both bedtimes and wake times, and fewer had >1 h sleep schedule variability. CONCLUSIONS Parental sleep diaries over-estimate total sleep time but accurately report bed and wake times compared to actigraphy in children with DS. Children with DS have more regular sleep patterns than TD children of the same age, which is important for optimising daytime functioning. The reasons behind this warrant further investigation.
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Affiliation(s)
- Rosemary Sc Horne
- Department of Paediatrics, Monash University, Melbourne, Victoria, Australia.
| | - Marisha Shetty
- Department of Paediatrics, Monash University, Melbourne, Victoria, Australia
| | - Moya Vandeleur
- Department of Respiratory and Sleep Medicine, The Royal Children's Hospital, Melbourne, Victoria, Australia
| | - Margot J Davey
- Department of Paediatrics, Monash University, Melbourne, Victoria, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, Victoria, Australia
| | - Lisa M Walter
- Department of Paediatrics, Monash University, Melbourne, Victoria, Australia
| | - Gillian M Nixon
- Department of Paediatrics, Monash University, Melbourne, Victoria, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, Victoria, Australia
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Chen Y, Xu J, Yin G, Ye J. Effectiveness and safety of (adeno) tonsillectomy for pediatric obstructive sleep apnea in different age groups: A systematic review and meta-analysis. Sleep Med Rev 2023; 69:101782. [PMID: 37121134 DOI: 10.1016/j.smrv.2023.101782] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 02/14/2023] [Accepted: 03/18/2023] [Indexed: 05/02/2023]
Abstract
This meta-analysis aimed to assess the effectiveness and safety of (adeno)tonsillectomy (AT) for uncomplicated pediatric obstructive sleep apnea (OSA) across different age groups. Four electronic databases were searched until April 2022, and 93 studies (9087 participants) were selected, including before-after studies, cohort studies, and randomized controlled trials. It has been suggested that age, disease severity, and length of follow-up are associated with surgical effects. Compared with older children (>7 years), patients receiving AT surgery before the age of 7 exhibited a significantly greater release of disease severity, as well as a greater decrease in hypoxemic burden, improvement in sleep quality, and better cardiovascular function. Cognitive/behavioral performance also improved after AT, although it was more related to the length of follow-up than the age at surgery. Notably, the surgical complication rate was considerably higher in patients younger than 3 years old. Overall, we suggest that the age of 3-7 years might be optimal for AT in polysomnography-diagnosed uncomplicated OSA to maximize potential benefits for both disease and comorbidities and balance the risks of surgery.
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Affiliation(s)
- Yijing Chen
- Sleep Center, Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, China
| | - Jinkun Xu
- Sleep Center, Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, China
| | - Guoping Yin
- Sleep Center, Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, China
| | - Jingying Ye
- Sleep Center, Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, China; Institute of Precision Medicine, Tsinghua University, China.
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5
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Perspectives on paediatric sleep-disordered breathing in the UK: a qualitative study. The Journal of Laryngology & Otology 2022; 136:520-526. [DOI: 10.1017/s0022215121004242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractObjectiveThere is limited understanding of treatment pathways for paediatric sleep-disordered breathing. This study explored current UK pathways and what is important to well-being for parents and children.MethodThe study comprised in-depth qualitative interviews (n = 22) with parents of children (2–9 years) with symptoms of sleep-disordered breathing referred to a regional ENT clinic (n = 11), general practitioners who might refer these children to ENT (n = 5) and hospital doctors involved in treating these children (n = 6). Interviews were audio recorded, transcribed verbatim, anonymised and analysed thematically.ResultsGeneral practitioners rarely identify seeing children with sleep-disordered breathing; conversely hospital doctors identify unsuspected issues. Parents are worried their child will stop breathing, but routes to referral and diagnosis are not straightforward. Modern technology can aid investigation and diagnosis. Patient weight is an issue for general practitioners and hospital doctors. Adenotonsillectomy is the treatment of choice, and information on paediatric sleep-disordered breathing is needed.ConclusionGuidelines for the management of paediatric sleep-disordered breathing are needed.
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6
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Sibarani CR, Walter LM, Davey MJ, Nixon GM, Horne RSC. Sleep-disordered breathing and sleep macro- and micro-architecture in children with Down syndrome. Pediatr Res 2022; 91:1248-1256. [PMID: 34230620 DOI: 10.1038/s41390-021-01642-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/16/2021] [Accepted: 06/21/2021] [Indexed: 01/07/2023]
Abstract
BACKGROUND Children with Down syndrome (DS) are at increased risk of sleep-disordered breathing (SDB), which is associated with intermittent hypoxia and sleep disruption affecting daytime functioning. We aimed to compare the impact of SDB on sleep quality in children with DS compared to typically developing (TD) children with and without SDB. METHODS Children with DS and SDB (n = 44) were age- and sex-matched with TD children without SDB (TD-) and also for SDB severity with TD children with SDB (TD+). Children underwent overnight polysomnography with sleep macro- and micro-architecture assessed using electroencephalogram (EEG) spectral analysis, including slow-wave activity (SWA, an indicator of sleep propensity). RESULTS Children with DS had greater hypoxic exposure, more respiratory events during REM sleep, higher total, delta, sigma, and beta EEG power in REM than TD+ children, despite the same overall frequency of obstructive events. Compared to TD- children, they also had more wake after sleep-onset and lower sigma power in N2 and N3. The DS group had reduced SWA, indicating reduced sleep drive, compared to both TD groups. CONCLUSIONS Our findings suggest that SDB has a greater impact on sleep quality in children with DS compared to TD children. IMPACT SDB in children with DS exacerbates disruption of sleep quality, compared to TD children. The prevalence of SDB is very high in children with DS; however, studies on the effects of SDB on sleep quality are limited in this population. Our findings suggest that SDB has a greater impact on sleep quality in children with DS compared to TD children, and should be screened for and treated as soon as possible.
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Affiliation(s)
- Christy R Sibarani
- Department of Paediatrics and The Ritchie Centre, Monash University, Melbourne, VIC, Australia
| | - Lisa M Walter
- Department of Paediatrics and The Ritchie Centre, Monash University, Melbourne, VIC, Australia
| | - Margot J Davey
- Department of Paediatrics and The Ritchie Centre, Monash University, Melbourne, VIC, Australia.,Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, VIC, Australia
| | - Gillian M Nixon
- Department of Paediatrics and The Ritchie Centre, Monash University, Melbourne, VIC, Australia.,Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, VIC, Australia
| | - Rosemary S C Horne
- Department of Paediatrics and The Ritchie Centre, Monash University, Melbourne, VIC, Australia.
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7
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Horne RSC. Consequences of paediatric sleep disordered breathing: contributions from Australian and New Zealand investigators. Sleep Med 2020; 77:147-160. [PMID: 33373901 DOI: 10.1016/j.sleep.2020.11.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/23/2020] [Accepted: 11/29/2020] [Indexed: 12/13/2022]
Abstract
AIMS To highlight the contributions of Australian and New Zealand researchers to the identification of the consequences of paediatric sleep disordered breathing (SDB). METHODS A search was conducted in PubMed using the terms "sleep disordered breathing" "child" and "Australia or New Zealand". All abstracts were reviewed and those which focused on the consequences of SDB have been included. RESULTS Australasian research into the consequences of SDB has grown exponentially over the last 35 years. SDB has significant adverse consequences for quality of life, behaviour, neurocognition and the cardiovascular system and the Australasian research studies investigating these are summarised. CONCLUSIONS Australian and New Zealand researchers have played a significant role in understanding the consequences of paediatric SDB and the mechanisms which underpin these. The research conducted "Downunder" has led the world in this field of research and will continue to provide evidence to improve the lives of children not only in Australasia but around the world.
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Affiliation(s)
- Rosemary S C Horne
- Department of Paediatrics, Monash University, Level 5, Monash Children's Hospital, 246 Clayton Rd, Melbourne, 3168, Victoria, Australia.
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8
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Chan M, Wong TCH, Weichard A, Nixon GM, Walter LM, Horne RSC. Sleep macro-architecture and micro-architecture in children born preterm with sleep disordered breathing. Pediatr Res 2020; 87:703-710. [PMID: 31195406 DOI: 10.1038/s41390-019-0453-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/16/2019] [Accepted: 05/29/2019] [Indexed: 11/09/2022]
Abstract
BACKGROUND Both preterm birth and sleep disordered breathing (SDB) affect sleep in children. We compared the effects of SDB on sleep macro-architecture and micro-architecture in children born preterm (N = 50) and children born at term (N = 50). We hypothesized that sleep would be more disrupted in children born preterm. METHODS Polysomnographic studies matched for age (3-12 years) and SDB severity were analyzed. Sleep macro-architecture was assessed using standard criteria and micro-architecture was evaluated using spectral analysis of the electroencephalogram and slow wave activity (SWA) calculated for each sleep stage across the night. RESULTS Ex-preterm children (gestational age 29.3 ± 3.6 weeks, mean ± standard error of the mean) were not different from controls for demographic or respiratory parameters or sleep macro-architecture. Theta power in N2 tended to be higher for F4 (p < 0.05) and C4 (p < 0.07). In the second non-rapid eye movement period, SWA was significantly higher in the preterm group compared to the term group for both F4 and C4 (p < 0.05 for both). CONCLUSIONS Sleep micro-architecture in children born preterm showed increased theta power and SWA. These differences provide evidence of increased sleep debt and reduced dissipation of sleep debt across the night. Further studies are required to identify if these findings are related to impaired neurocognition and behavior.
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Affiliation(s)
- Martin Chan
- The Ritchie Centre, Hudson Institute of Medical Research and Department of Paediatrics, Monash University, Melbourne, VIC, Australia.,The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Tracy C H Wong
- The Ritchie Centre, Hudson Institute of Medical Research and Department of Paediatrics, Monash University, Melbourne, VIC, Australia.,The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Aidan Weichard
- The Ritchie Centre, Hudson Institute of Medical Research and Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Gillian M Nixon
- The Ritchie Centre, Hudson Institute of Medical Research and Department of Paediatrics, Monash University, Melbourne, VIC, Australia.,Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, VIC, Australia
| | - Lisa M Walter
- The Ritchie Centre, Hudson Institute of Medical Research and Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Rosemary S C Horne
- The Ritchie Centre, Hudson Institute of Medical Research and Department of Paediatrics, Monash University, Melbourne, VIC, Australia.
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9
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Yiallourou SR, Arena BC, Wallace EM, Odoi A, Hollis S, Weichard A, Horne RSC. Being Born Too Small and Too Early May Alter Sleep in Childhood. Sleep 2017; 41:4643001. [DOI: 10.1093/sleep/zsx193] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Stephanie R Yiallourou
- Department of Paediatrics, The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
- Pre-Clinical Disease and Prevention Unit, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Bianca C Arena
- Department of Paediatrics, The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Euan M Wallace
- Department of Obstetrics and Gynaecology, The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Alexsandria Odoi
- Department of Paediatrics, The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Samantha Hollis
- Department of Paediatrics, The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Aidan Weichard
- Department of Paediatrics, The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Rosemary S C Horne
- Department of Paediatrics, The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
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10
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Yiallourou SR, Wallace EM, Whatley C, Odoi A, Hollis S, Weichard AJ, Muthusamy JS, Varma S, Cameron J, Narayan O, Horne RSC. Sleep: A Window Into Autonomic Control in Children Born Preterm and Growth Restricted. Sleep 2017; 40:3737644. [PMID: 28419371 DOI: 10.1093/sleep/zsx048] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/13/2017] [Indexed: 11/14/2022] Open
Abstract
Study Objectives Preterm birth and fetal growth restriction (FGR) are both associated with risk of hypertension in adulthood. Mechanisms leading to this pathology are unclear. In children aged 5-12 years, who were born preterm and FGR, we used sleep as a tool to assess autonomic control with assessment of cardiovascular structure and function. Methods Eighteen children born preterm and FGR, 15 children born preterm with appropriate birth weights for gestational age (AGA), and 20 AGA term-born children were studied. Children underwent overnight polysomnography with the addition of continuous noninvasive blood pressure (Finometer™). Spectral measures of heart rate variability (HRV), blood pressure variability (BPV), and baroreflex sensitivity were assessed and overnight urinary catecholamine levels measured. Echocardiographic studies (Vivid7, GE Healthcare) were performed and vascular compliance assessed (Miller Instruments™). Statistical comparisons were adjusted for age and body size. Results Compared to term children, preterm AGA children had increased high frequency HRV (p < .05) and BPV (p < .05) during sleep, reflecting increased parasympathetic activation and blood pressure changes related to respiration. Preterm FGR children had smaller left ventricular lengths, ascending aorta, and left ventricular outflow tract diameter (p < .05 for all) and vascular compliance was positively correlated with gestational age (r2 = 0.93, p < .05). Conclusions FGR combined with preterm birth did not alter autonomic control but altered heart structure in children. In contrast, preterm birth alone altered autonomic control but had no change in heart structure. These changes in children born preterm and FGR may contribute, in part, to increased risk of cardiovascular disease later in life but by different mechanisms.
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Affiliation(s)
- Stephanie R Yiallourou
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Australia.,Department of Paediatrics, Monash University, Melbourne, Australia
| | - Euan M Wallace
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Australia.,Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - Christie Whatley
- Monash Cardiovascular Research Centre, Monash University and Monash Heart, Monash Health, Melbourne, Australia
| | - Alexsandria Odoi
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Australia
| | - Samantha Hollis
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Australia
| | - Aidan J Weichard
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Australia
| | | | - Suraj Varma
- Monash Cardiovascular Research Centre, Monash University and Monash Heart, Monash Health, Melbourne, Australia
| | - James Cameron
- Monash Cardiovascular Research Centre, Monash University and Monash Heart, Monash Health, Melbourne, Australia
| | - Om Narayan
- Monash Cardiovascular Research Centre, Monash University and Monash Heart, Monash Health, Melbourne, Australia
| | - Rosemary S C Horne
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Australia.,Department of Paediatrics, Monash University, Melbourne, Australia
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11
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Slow wave activity and executive dysfunction in children with sleep disordered breathing. Sleep Breath 2017; 22:517-525. [DOI: 10.1007/s11325-017-1570-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 08/27/2017] [Accepted: 09/08/2017] [Indexed: 10/18/2022]
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12
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Walter LM, Dassanayake DU, Weichard AJ, Davey MJ, Nixon GM, Horne RS. Back to sleep or not: the effect of the supine position on pediatric OSA. Sleep Med 2017; 37:151-159. [DOI: 10.1016/j.sleep.2017.06.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 06/16/2017] [Accepted: 06/18/2017] [Indexed: 11/28/2022]
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13
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Smith DL, Gozal D, Hunter SJ, Kheirandish-Gozal L. Parent-Reported Behavioral and Psychiatric Problems Mediate the Relationship between Sleep-Disordered Breathing and Cognitive Deficits in School-Aged Children. Front Neurol 2017; 8:410. [PMID: 28848496 PMCID: PMC5554505 DOI: 10.3389/fneur.2017.00410] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 07/28/2017] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Numerous studies over the past several decades have illustrated that children who suffer from sleep-disordered breathing (SDB) are at greater risk for cognitive, behavioral, and psychiatric problems. Although behavioral problems have been proposed as a potential mediator between SDB and cognitive functioning, these relationships have not been critically examined. METHODS This analysis is based on a community-based cohort of 1,115 children who underwent overnight polysomnography, and cognitive and behavioral phenotyping. Structural model of the relationships between SDB, behavior, and cognition, and two recently developed mediation approaches based on propensity score weighting and resampling were used to assess the mediational role of parent-reported behavior and psychiatric problems in the relationship between SDB and cognitive functioning. Multiple models utilizing two different SDB definitions further explored direct effects of SDB on cognition as well as indirect effects through behavioral pathology. All models were adjusted for age, sex, race, BMI z-score, and asthma status. RESULTS Indirect effects of SDB through behavior problems were significant in all mediation models, while direct effects of SDB on cognition were not. The findings were consistent across different mediation procedures and remained essentially unaltered when different criteria for SDB, behavior, and cognition were used. CONCLUSION Potential effects of SDB on cognitive functioning appear to occur through behavioral problems that are detectable in this pediatric population. Thus, early attentional or behavioral pathology may be implicated in the cognitive functioning deficits associated with SDB, and may present an early morbidity-related susceptibility biomarker.
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Affiliation(s)
- Dale L. Smith
- Public Health Sciences, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, United States
- Olivet Nazarene University, Bourbonnais, IL, United States
| | - David Gozal
- Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, United States
| | - Scott J. Hunter
- Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, United States
- Department of Psychiatry and Behavioral Neuroscience, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, United States
| | - Leila Kheirandish-Gozal
- Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, United States
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14
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Association between slow-wave activity, cognition and behaviour in children with sleep-disordered breathing. Sleep Med 2016; 25:49-55. [DOI: 10.1016/j.sleep.2016.06.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 06/13/2016] [Accepted: 06/14/2016] [Indexed: 11/20/2022]
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15
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Liu J, Liu X, Ji X, Wang Y, Zhou G, Chen X. Sleep disordered breathing symptoms and daytime sleepiness are associated with emotional problems and poor school performance in children. Psychiatry Res 2016; 242:218-225. [PMID: 27289327 PMCID: PMC4976000 DOI: 10.1016/j.psychres.2016.05.017] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 05/13/2016] [Accepted: 05/13/2016] [Indexed: 10/21/2022]
Abstract
This study examined the prevalence of sleep disordered breathing (SDB) symptoms and their associations with daytime sleepiness, emotional problems, and school performance in Chinese children. Participants included 3979 children (10.99±0.99 years old) from four elementary schools in Jintan City, Jiangsu Province, China. Children completed a self-administered questionnaire on sleep behavior and emotional problems, while parents completed the Child Sleep Habit Questionnaire (CSHQ). SDB symptoms included 3 items: loud snoring, stopped breathing, and snorting/gasping during sleep. Teachers rated the children's school performance. The prevalence rates of parent- and self-reported SDB symptoms were 17.2% and 10.1% for "sometimes" and 8.9% and 5.6% for "usually". SDB symptoms, more prevalent in boys than in girls, increased the risks for depression, loneliness, and poor school performance. Daytime sleepiness mediated the relationship between SDB symptoms and depression, loneliness, and poor school performance. This study suggests the importance of early screening and intervention of SDB and daytime sleepiness in child behavioral and cognitive development.
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Affiliation(s)
- Jianghong Liu
- University of Pennsylvania, School of Nursing, Philadelphia, PA, USA.
| | - Xianchen Liu
- Shandong University School of Public Health, Jinan, China.
| | - Xiaopeng Ji
- University of Pennsylvania, School of Nursing, Philadelphia, PA, USA
| | - Yingjie Wang
- University of Pennsylvania, School of Nursing, Philadelphia, PA, USA
| | | | - Xinyin Chen
- University of Pennsylvania, School of Education, Philadelphia, PA, USA
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16
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Jussila M, Saarenpää-Heikkilä O, Huupponen E, Lapinlampi AM, Penttala J, Himanen SL. Sleep apnea reduces the amount of computational deep sleep in the right frontopolar area in school-aged children. Clin Neurophysiol 2016; 127:2167-74. [DOI: 10.1016/j.clinph.2016.02.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 02/17/2016] [Accepted: 02/24/2016] [Indexed: 10/22/2022]
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17
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Walter LM, Biggs SN, Nisbet LC, Weichard AJ, Hollis SL, Davey MJ, Anderson V, Nixon GM, Horne RSC. Improved long-term autonomic function following resolution of sleep-disordered breathing in preschool-aged children. Sleep Breath 2015; 20:309-19. [DOI: 10.1007/s11325-015-1268-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/22/2015] [Accepted: 09/21/2015] [Indexed: 12/13/2022]
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18
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Sleep apnoea and the brain: a complex relationship. THE LANCET RESPIRATORY MEDICINE 2015; 3:404-14. [DOI: 10.1016/s2213-2600(15)00090-9] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 03/02/2015] [Accepted: 03/02/2015] [Indexed: 01/23/2023]
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19
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K-complex amplitude as a marker of sleep homeostasis in obstructive sleep apnea syndrome and healthy controls. SOMNOLOGIE 2015. [DOI: 10.1007/s11818-015-0701-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Biggs SN, Nixon GM, Horne RS. The conundrum of primary snoring in children: What are we missing in regards to cognitive and behavioural morbidity? Sleep Med Rev 2014; 18:463-75. [DOI: 10.1016/j.smrv.2014.06.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 06/20/2014] [Accepted: 06/20/2014] [Indexed: 12/11/2022]
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21
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Sleep-disordered breathing does not affect nocturnal dipping, as assessed by pulse transit time, in preschool children: evidence for early intervention to prevent adverse cardiovascular effects? Sleep Med 2014; 15:464-71. [DOI: 10.1016/j.sleep.2013.11.787] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/07/2013] [Accepted: 11/09/2013] [Indexed: 01/28/2023]
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22
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Biggs SN, Vlahandonis A, Anderson V, Bourke R, Nixon GM, Davey MJ, Horne RSC. Long-term changes in neurocognition and behavior following treatment of sleep disordered breathing in school-aged children. Sleep 2014; 37:77-84. [PMID: 24470698 PMCID: PMC3902882 DOI: 10.5665/sleep.3312] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
STUDY OBJECTIVES Sleep disordered breathing (SDB) in children is associated with detrimental neurocognitive and behavioral consequences. The long term impact of treatment on these outcomes is unknown. This study examined the long-term effect of treatment of SDB on neurocognition, academic ability, and behavior in a cohort of school-aged children. DESIGN Four-year longitudinal study. Children originally diagnosed with SDB and healthy non-snoring controls underwent repeat polysomnography and age-standardized neurocognitive and behavioral assessment 4y following initial testing. SETTING Melbourne Children's Sleep Centre, Melbourne, Australia. PARTICIPANTS Children 12-16 years of age, originally assessed at 7-12 years, were categorized into Treated (N = 12), Untreated (N = 26), and Control (N = 18) groups. INTERVENTIONS Adenotonsillectomy, Tonsillectomy, Nasal Steroids. Decision to treat was independent of this study. MEASUREMENTS AND RESULTS Changes in sleep and respiratory parameters over time were assessed. A decrease in obstructive apnea hypopnea index (OAHI) from Time 1 to Time 2 was seen in 63% and 100% of the Untreated and Treated groups, respectively. The predictive relationship between change in OAHI and standardized neurocognitive, academic, and behavioral scores over time was examined. Improvements in OAHI were predictive of improvements in Performance IQ, but not Verbal IQ or academic measures. Initial group differences in behavioral assessment on the Child Behavior Checklist did not change over time. Children with SDB at baseline continued to exhibit significantly poorer behavior than Controls at follow-up, irrespective of treatment. CONCLUSIONS After four years, improvements in SDB are concomitant with improvements in some areas of neurocognition, but not academic ability or behavior in school-aged children.
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Affiliation(s)
- Sarah N. Biggs
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Australia
| | - Anna Vlahandonis
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Australia
| | - Vicki Anderson
- Critical Care and Neuroscience Research, Murdoch Childrens Research Institute, Melbourne, Australia
- Psychological Sciences, University of Melbourne, Melbourne, Australia
| | - Robert Bourke
- Critical Care and Neuroscience Research, Murdoch Childrens Research Institute, Melbourne, Australia
- Psychological Sciences, University of Melbourne, Melbourne, Australia
| | - Gillian M. Nixon
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Australia
- Melbourne Children's Sleep Centre, Monash Children's Hospital, Monash Medical Centre, Melbourne, Australia
| | - Margot J. Davey
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Australia
- Melbourne Children's Sleep Centre, Monash Children's Hospital, Monash Medical Centre, Melbourne, Australia
| | - Rosemary S. C. Horne
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Australia
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23
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Jackman AR, Biggs SN, Walter LM, Embuldeniya US, Davey MJ, Nixon GM, Anderson V, Trinder J, Horne RSC. Sleep disordered breathing in early childhood: quality of life for children and families. Sleep 2013; 36:1639-46. [PMID: 24179296 DOI: 10.5665/sleep.3116] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVES To characterize health-related quality of life (QOL) in preschool children with sleep disordered breathing (SDB) and their families compared with nonsnoring control patients in the community. It was hypothesized that children with SDB and their families would have poorer QOL than control children, that a relationship would be found between SDB severity and QOL, and that even children with mild SDB and their families would have reduced QOL. PARTICIPANTS AND METHODS A clinical sample of preschool children (3-5 y) with SDB diagnosed by gold standard polysomnography (primary snoring, PS = 56, mild obstructive sleep apnea, OSA = 35, moderate/severe OSA = 24) and control children recruited from the community (n = 38) were studied. Parents completed health-related QOL and parenting stress questionnaires. RESULTS Children and families in the PS and mild OSA groups had consistently poorer QOL than control children (both P < 0.05-0.001), based on parent ratings, and parents of children with PS had elevated stress ratings relative to control children (P < 0.05-0.001). The moderate/severe OSA group differed from the control group on select measures of parent and family QOL (worry, P < 0.001 and total family impact, P < 0.05). CONCLUSIONS Our findings demonstrate that sleep disordered breathing is associated with reduced quality of life in preschool children and their families. These results support previous quality of life findings in older children and in samples with broader age ranges. Furthermore, clinically referred preschool children with mild forms of sleep disordered breathing may be at greatest risk.
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Affiliation(s)
- Angela R Jackman
- Melbourne School of Psychological Sciences, The University of Melbourne, Melbourne, Australia
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24
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Nisbet LC, Yiallourou SR, Nixon GM, Biggs SN, Davey MJ, Trinder J, Walter LM, Horne RSC. Nocturnal autonomic function in preschool children with sleep-disordered breathing. Sleep Med 2013; 14:1310-6. [PMID: 24091143 DOI: 10.1016/j.sleep.2013.07.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 06/21/2013] [Accepted: 07/18/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND Obstructive sleep apnea (OSA) is associated with autonomic dysfunction in adults and school-aged children; however, this association has not been investigated in preschool children. We aimed to analyze heart rate variability (HRV) and catecholamine levels in preschool children with OSA. METHODS One hundred and forty-two snoring children aged 3-5years and 38 nonsnoring control group children underwent overnight polysomnography (PSG). Nocturnal urinary catecholamines were measured in 120 children. Children were grouped according to their obstructive apnea-hypopnea index (OAHI) (control [no snoring], OAHI⩽1event/h; primary snoring, OAHI⩽1event/h; mild OSA OAHI>1⩽5events/h; moderate to severe [MS] OSA, OAHI>5events/h). The HRV parameters for each child were averaged during rapid eye movement (REM) and non-REM (NREM) sleep. RESULTS During stable sleep, low-frequency (LF) HRV was similar between groups. High-frequency (HF) HRV was higher in the MS OSA group compared with the control group during all sleep stages (NREM sleep stages 1 and 2 [NREM1/2], 4234±523ms(2) vs 2604±457ms(2); NREM sleep stages 3 and 4 [NREM3/4], 4152±741ms(2) vs 3035±647ms(2); REM, 1836±255ms(2) vs 1456±292ms(2); P<.01 for all). The LF/HF ratio was lower in the MS OSA group compared with the control group (NREM1/2, 0.4±0.06 vs 0.7±0.05; NREM3/4, 0.3±0.06 vs 0.4±0.05; REM, 0.8±0.1 vs 1.3±0.1; P<.01 for all). Catecholamine levels were not different between groups. CONCLUSIONS In preschool children, OSA is associated with altered HRV, largely due to the HF fluctuations in heart rate (HR) which occur during respiratory events and are still evident during stable sleep. The preschool age may represent a window of opportunity for treatment of OSA before the onset of the severe autonomic dysfunction associated with OSA in adults and older children.
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Affiliation(s)
- Lauren C Nisbet
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Australia
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25
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Nisbet LC, Yiallourou SR, Nixon GM, Biggs SN, Davey MJ, Trinder J, Walter LM, Horne RSC. Characterization of the acute pulse transit time response to obstructive apneas and hypopneas in preschool children with sleep-disordered breathing. Sleep Med 2013; 14:1123-31. [PMID: 24047534 DOI: 10.1016/j.sleep.2013.06.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 06/24/2013] [Accepted: 06/27/2013] [Indexed: 12/16/2022]
Abstract
BACKGROUND Surges in heart rate (HR) and blood pressure (BP) at apnea termination contribute to the hypertension seen in obstructive sleep apnea (OSA). Because childhood OSA prevalence peaks in the preschool years, we aimed to characterize the cardiovascular response to obstructive events in preschool-aged children. METHODS Clinically referred children aged 3-5 years were grouped by obstructive apnea-hypopnea index (OAHI) into the following: primary snoring (PS) (OAHI≤1 event/h [n=21]), mild OSA (OAHI>1-≤5 [n=32]), and moderate to severe (MS) OSA (OAHI>5 [n=28]). Beat-to-beat pulse transit time (PTT), an inverse continuous indicator of BP changes, and HR were averaged during the two halves (early and late) and during the peak after (post) each obstructive event and were expressed as percentage change from late- to post-event. RESULTS We analyzed 422 events consisting of 55 apneas and 367 hypopneas. A significant post-event increase in HR and fall in PTT occurred in all severity groups (P<.05 for all). A greater response was associated with OSA, nonrapid eye movement sleep (NREM), cortical arousal, hypopneas, and oxygen desaturation (P<.05 for all). CONCLUSIONS Obstructive events elicit acute cardiovascular changes in preschool children. Such circulatory perturbations have been implicated in the development of hypertension, and our findings complement previous studies to suggest a cumulative impact of snoring on the cardiovascular system from childhood into adulthood.
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Affiliation(s)
- Lauren C Nisbet
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
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26
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Nisbet LC, Yiallourou SR, Biggs SN, Nixon GM, Davey MJ, Trinder JA, Walter LM, Horne RSC. Preschool children with obstructive sleep apnea: the beginnings of elevated blood pressure? Sleep 2013; 36:1219-26. [PMID: 23904682 PMCID: PMC3700719 DOI: 10.5665/sleep.2890] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
STUDY OBJECTIVES In adults and older children, snoring and obstructive sleep apnea (OSA) are associated with elevated blood pressure (BP). However, BP has not been assessed in preschool children, the age of highest OSA prevalence. We aimed to assess overnight BP in preschool children with snoring and OSA using pulse transit time (PTT), an inverse continuous indicator of BP changes. DESIGN Overnight polysomnography including PTT. Children were grouped according to their obstructive apnea-hypopnea index (OAHI); control (no snoring, with OAHI of one event or less per hour), primary snoring (OAHI one event or less per hour), mild OSA (OAHI greater than one event to five events per hour) and moderate-severe OSA (OAHI more than five events per hour). SETTING Pediatric sleep laboratory. PATIENTS There were 128 clinically referred children (aged 3-5 years) and 35 nonsnoring community control children. MEASUREMENT AND RESULTS PTT was averaged for each 30-sec epoch of rapid eye movement (REM) or nonrapid eye movement (NREM) sleep and normalized to each child's mean wake PTT. PTT during NREM was significantly higher than during REM sleep in all groups (P < 0.001 for all). During REM sleep, the moderate-severe OSA group had significantly lower PTT than the mild and primary snoring groups (P < 0.05 for both). This difference persisted after removal of event-related PTT changes. CONCLUSIONS Moderate-severe OSA in preschool children has a significant effect on pulse transit time during REM sleep, indicating that these young children have a higher baseline BP during this state. We propose that the REM-related elevation in BP may be the first step toward development of daytime BP abnormalities. Given that increased BP during childhood predicts hypertension in adulthood, longitudinal studies are needed to determine the effect of resolution of snoring and/or OSA at this age.
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Affiliation(s)
- Lauren C. Nisbet
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Stephanie R. Yiallourou
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Sarah N. Biggs
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Gillian M. Nixon
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
- Melbourne Children's Sleep Centre, Monash Children's Programme, Monash Medical Centre, Melbourne, Victoria, Australia
| | - Margot J. Davey
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
- Melbourne Children's Sleep Centre, Monash Children's Programme, Monash Medical Centre, Melbourne, Victoria, Australia
| | - John A. Trinder
- Discipline of Psychological Sciences, University of Melbourne, Melbourne, Victoria, Australia
| | - Lisa M. Walter
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
| | - Rosemary S. C. Horne
- The Ritchie Centre, Monash Institute of Medical Research, Monash University, Melbourne, Victoria, Australia
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