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Olivera A, Estevan I, Tassino B, Rossel C, Silva A. Epidemiology of sleep patterns and circadian typology in uruguayan children: The contribution of school shifts. Sleep Med X 2024; 7:100099. [PMID: 38234312 PMCID: PMC10792258 DOI: 10.1016/j.sleepx.2023.100099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 01/19/2024] Open
Abstract
Healthy sleep is defined by the combination of adequate duration, good quality, and regular timing. In children, sleep thus depends on the interplay of individual, parental, organizational, community, and social variables, but only a few studies have addressed this issue in a comprehensive way nationwide. Using the Uruguayan nationally representative survey (Nutrition, Child Development, and Health Survey, Encuesta de Nutrición, Desarrollo Infantil y Salud, ENDIS), we present the first epidemiological characterization of chronobiological and sleep parameters in Latin American children. On average, Uruguayan urban children (n = 2437; 5-10-years old) showed quite late chronotypes (MSFsc = 03:53 ± 1:07), moderate misalignment (SJL = 1.0 ± 0.9 h), and adequate sleep duration (SDweek = 9.9 ± 1.0 h). Further, we show the substantial influence of school shift schedules on children's circadian typology and sleep patterns. Our results show that children attending the morning school shift have a higher risk of sleep problems than afternoon-school shift ones. The chronotype and sleep were earlier in morning-school shift children than in children attending the afternoon school shift. However, morning-school shift children had stronger misalignment, shorter sleep on school days, and a higher risk of chronic sleep deficit and non-healthy circadian misalignment (even worse in late chronotypes) than afternoon-shift children. This evidence points to the need of evaluating policies to reorganize school start times to prevent the negative effects that early schooling seems to have on children's sleep health, which has been neglected so far.
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Affiliation(s)
- Andrés Olivera
- Grupo Cronobiología, Comisión Sectorial de Investigación Científica, Universidad de la República, Jackson 1301, 11200, Montevideo, Uruguay
- Departamento de Ciencias Sociales, Universidad Católica del Uruguay, 8 de octubre 2768, 11600, Montevideo, Uruguay
| | - Ignacio Estevan
- Grupo Cronobiología, Comisión Sectorial de Investigación Científica, Universidad de la República, Jackson 1301, 11200, Montevideo, Uruguay
- Programa de Neuropsicología y Neurobiología, Facultad de Psicología, Universidad de la República, Tristán Narvaja 1674, 11200, Montevideo, Uruguay
| | - Bettina Tassino
- Grupo Cronobiología, Comisión Sectorial de Investigación Científica, Universidad de la República, Jackson 1301, 11200, Montevideo, Uruguay
- Sección Etología, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400, Montevideo, Uruguay
| | - Cecilia Rossel
- Departamento de Ciencias Sociales, Universidad Católica del Uruguay, 8 de octubre 2768, 11600, Montevideo, Uruguay
| | - Ana Silva
- Grupo Cronobiología, Comisión Sectorial de Investigación Científica, Universidad de la República, Jackson 1301, 11200, Montevideo, Uruguay
- Laboratorio de Neurociencias, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400, Montevideo, Uruguay
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Lyu J, Jin S, Ji C, Yan R, Feng C, Rozelle S, Wang H. The Connection between Sleep Patterns and Mental Health: Insights from Rural Chinese Students. Healthcare (Basel) 2024; 12:1507. [PMID: 39120210 PMCID: PMC11311341 DOI: 10.3390/healthcare12151507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 06/10/2024] [Accepted: 07/25/2024] [Indexed: 08/10/2024] Open
Abstract
BACKGROUND The association between sleep patterns and young students' mental health, which is crucial for their development, remains understudied in rural China. Therefore, the relationship between sleep patterns and mental health among primary and junior high school students in rural China was examined. METHOD A total of 1592 primary and junior high school students from rural areas of Gansu Province were surveyed, and the Depression Anxiety and Stress Scale (DASS) was utilized to assess mental health, alongside self-reported data on their daily sleep patterns. RESULTS Significant sleep inadequacies were identified: 28% of students received less than 8 h of sleep on weekdays, and 19% went to bed later than recommended. On weekends, 38% of students had delayed bedtimes, though only 7.2% received less than 8 h of sleep. Notably, a "U-shaped" relationship was uncovered between sleep duration and mental health for students on weekends, with optimal mental health correlated with receiving 10-11 h of sleep, while both shorter and longer sleep durations on weekends worsened outcomes. This pattern is absent on weekdays. Additionally, adequate sleep and an earlier bedtime was linked to a 6-8% decrease in mental health risks. CONCLUSIONS These findings provide valuable insights for policymakers seeking to enhance student mental well-being in rural settings, emphasizing the importance of implementing measures that promote balanced sleep habits among young students.
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Affiliation(s)
- Jiayang Lyu
- China Academy for Rural Development (CARD), Department of Agricultural Economics and Management, School of Public Affairs, Zhejiang University, 866 Yuhangtang Rd., Hangzhou 310058, China; (J.L.)
- Stanford Center on China’s Economy and Institutions, Freeman Spogli Institute for International Studies, Stanford University, Stanford, CA 94305, USA
| | - Songqing Jin
- Department of Agricultural, Food and Resource Economics, Michigan State University, 220 Trowbridge Rd., East Lansing, MI 48824, USA
| | - Chen Ji
- China Academy for Rural Development (CARD), Department of Agricultural Economics and Management, School of Public Affairs, Zhejiang University, 866 Yuhangtang Rd., Hangzhou 310058, China; (J.L.)
| | - Ru Yan
- China Academy for Rural Development (CARD), Department of Agricultural Economics and Management, School of Public Affairs, Zhejiang University, 866 Yuhangtang Rd., Hangzhou 310058, China; (J.L.)
- Stanford Center on China’s Economy and Institutions, Freeman Spogli Institute for International Studies, Stanford University, Stanford, CA 94305, USA
| | - Cindy Feng
- Stanford Center on China’s Economy and Institutions, Freeman Spogli Institute for International Studies, Stanford University, Stanford, CA 94305, USA
| | - Scott Rozelle
- Stanford Center on China’s Economy and Institutions, Freeman Spogli Institute for International Studies, Stanford University, Stanford, CA 94305, USA
- Tsingshan Institute for Advanced Business Studies, Zhejiang University, 866 Yuhangtang Rd., Hangzhou 310058, China
| | - Huan Wang
- Stanford Center on China’s Economy and Institutions, Freeman Spogli Institute for International Studies, Stanford University, Stanford, CA 94305, USA
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Peng Y, Arboleda-Merino L, Arrona-Palacios A, Cantoral A, Tellez Rojo MM, Peterson KE, Torres-Olascoaga L, Jansen EC. The Impact of the Double School Shift System on Lifestyle Behaviors Among Mexican Adolescents. J Adolesc Health 2024; 74:1164-1174. [PMID: 38483375 DOI: 10.1016/j.jadohealth.2024.01.026] [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: 06/16/2023] [Revised: 12/14/2023] [Accepted: 01/10/2024] [Indexed: 04/02/2024]
Abstract
PURPOSE Early school start times could adversely impact adolescent sleep duration. They could also impact other behaviors like diet and physical activity, either directly or indirectly through effects on sleep. We examined whether the double school shift system was associated with sleep, diet, and physical activity behaviors among Mexican adolescents. METHODS The analytic sample included 305 Mexican adolescents from a cohort study (on average 14.53 ± 1.75 years old and 51% male). Sleep and physical activity were measured with wrist actigraphy, while diet and other lifestyle behaviors were assessed with questionnaires. Regression analyses were conducted to compare lifestyle behaviors between the morning and afternoon school shifts, adjusting for potential confounders. RESULTS Adolescents attending the morning school shift (44%) had pronounced differences in sleep compared to those attending afternoon shift, including a 1.77-hour shorter sleep duration on weekdays (95% CI -1.55, -2.00), a 0.40-hour longer sleep duration on weekends (95% CI 0.10, 0.70), higher social jetlag (1.07 hours with a 95% CI of 0.87, 1.27), and an earlier chronotype. Morning shift students also had 0.85 hours longer sedentary time (95% CI 0.61, 1.10) and higher consumption of a meat and starchy food dietary pattern. Among boys only, morning shift was associated with a lower likelihood of smoking and higher consumption of a breakfast pattern. DISCUSSION Overall, attending a morning school shift was associated with shorter sleep, more social jetlag, greater sedentary time, and higher consumption of a meat and starchy diet. However, among boys, a few healthier behaviors were observed for the morning versus afternoon shift.
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Affiliation(s)
- Yujie Peng
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Laura Arboleda-Merino
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Arturo Arrona-Palacios
- Writing Lab, Institute for the Future of Education, Tecnologico de Monterrey, Monterrey, Nuevo León, Mexico; Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts; Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts
| | | | - Martha Maria Tellez Rojo
- Center for Research on Nutrition and Health, National Institute of Public Health, Cuernavaca, Morelos, Mexico
| | - Karen E Peterson
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan; Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Libni Torres-Olascoaga
- Center for Research on Nutrition and Health, National Institute of Public Health, Cuernavaca, Morelos, Mexico
| | - Erica C Jansen
- Department of Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan; Department of Neurology, Division of Sleep Medicine, Michigan Medicine, Ann Arbor, Michigan.
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Liang X, He X, Liu Q, Ren Y, Xu S, Chen L, Wang F, Bi Y, Peng Z. The impact of dietary and sleep rhythms on blood pressure in children and adolescents: a cross-sectional study. Hypertens Res 2024; 47:649-662. [PMID: 37919430 DOI: 10.1038/s41440-023-01493-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/02/2023] [Accepted: 10/06/2023] [Indexed: 11/04/2023]
Abstract
Evidence about the relationship between meal and sleep time and CVD in children is scarce. The aims of this study were to describe the association between life rhythm patterns and blood pressure in children. This research was conducted among 5,608 children aged 6 to 15 years old in Chongqing and Sichuan provinces in 2021 and 2022. Dietary and sleep rhythms information was collected. The time of the first meal and last meal, and sleep time, were obtained. The mean age was 10.48 ± 2.24 years old, with 2958 (52.75%) male participants. The mean feeding window on weekdays was 11.69 h, 12.42 h, and 13.23 h for participants aged 6-7 years old, 8-12 years old and 13-15 years old, respectively. Weekday feeding window and last mealtime were positively correlated with blood pressure levels. And the changes in the feeding window between weekdays and weekends were significantly correlated with BP. Sleep duration and change in wake time were significantly correlated with SBP. Based on these results, this study identified the optimal combination of dietary and sleep rhythm interventions for children younger than 12 years of age and aged 12 and older, respectively. Disorder dietary and sleep rhythms disorders may correlate with elevated blood pressure levels, suggesting developing optimal dietary and sleep rhythm patterns could prevent the incidence of CVDs in children. The optimal dietary rhythm was defined by the indexes of breakfast time, dinner time and daily feeding window. As good meal patterns are defined as satisfied the following three items: for children younger than 12 years should have breakfast after 7:30 am; aged 12 years and over should have breakfast after 7 am; having dinner before 6 pm; daily feeding window less than 12.5 h. And less optimal dietary rhythm should satisfy any condition or eat dinner between 6 pm and 8 pm; and poor dietary rhythm should not satisfy any of the three criteria and eat dinner after 8 pm. Children with optimal dietary rhythm (in group A) had lower SBP (P < 0.001), DBP (P = 0.002) and MAP (P < 0.001) than those in group C.
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Affiliation(s)
- Xiaohua Liang
- Department of Clinical Epidemiology and Biostatistics, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400016, China.
| | - Xiangqian He
- College of Medical Informatics, Medical Data Science Academy, Chongqing Medical University, Chongqing, 400014, China
| | - Qin Liu
- Department of Clinical Epidemiology and Biostatistics, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400016, China
| | - Yanling Ren
- Department of Clinical Epidemiology and Biostatistics, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400016, China
| | - Sipei Xu
- The First Department of Clinical Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China
| | - Lan Chen
- Department of Clinical Epidemiology and Biostatistics, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400016, China
| | - Fengming Wang
- Department of Clinical Epidemiology and Biostatistics, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400016, China
| | - Yang Bi
- Department of Clinical Epidemiology and Biostatistics, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, 400016, China
| | - Zhilian Peng
- Traditional Chinese Medicine Hospital of Jiulongpo District, Chongqing, China
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Huang WY, Feng J, Zheng C, Jiao J, Wong SHS. Associations of social jetlag with physical activity and sedentary behaviour in children and adolescents: A systematic review and meta-analysis. J Sleep Res 2024; 33:e13997. [PMID: 37443521 DOI: 10.1111/jsr.13997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 06/07/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023]
Abstract
Sleep and daytime movement behaviours occur co-dependently with each other within a finite 24 h day. Sleep parameters other than sleep duration, such as social jetlag and chronotype, have been linked to health problems and unhealthy behaviours among children and adolescents. Given the increasing number of studies examining sleep timing/chronotype and weight-related behaviours, including physical activity and sedentary behaviour, in the past decade, this systematic review and meta-analysis collated and evaluated the evidence on the relationships of social jetlag and chronotype with physical activity and sedentary behaviour among children and adolescents aged 3-17 years. Seven databases were searched on 16 March 2022, and 52 studies were identified as eligible for inclusion, 47 of which were suitable for the meta-analysis. A positive association was found between social jetlag and screen media use (r = 0.14, 95% CI: 0.04-0.24; I2 = 96%; p = 0.008). The morning chronotype was associated with a higher level of physical activity and a lower level of sedentary behaviour than the evening chronotype. No relationship was found between social jetlag and physical activity. The magnitude of heterogeneity among the included studies was high. Further experimental studies are urgently required to understand how circadian preference or misalignment affects activity behaviours. Interventions to promote an active lifestyle in young populations should consider their circadian preference, especially among individuals with the evening chronotype.
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Affiliation(s)
- Wendy Y Huang
- Department of Sport, Physical Education and Health, Hong Kong Baptist University, Hong Kong, China
- Dr Stephen Hui Research Centre for Physical Recreation and Wellness, Hong Kong Baptist University, Hong Kong, China
| | - Jie Feng
- Department of Sport, Physical Education and Health, Hong Kong Baptist University, Hong Kong, China
| | - Chen Zheng
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong, China
| | - Jiao Jiao
- Department of Sport, Physical Education and Health, Hong Kong Baptist University, Hong Kong, China
| | - Stephen H S Wong
- Department of Sports Science and Physical Education, The Chinese University of Hong Kong, Hong Kong, China
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Lins-Filho ODL, Andrade-Lima A, Torres AD, Oliveira LM, Luiz do-Prado W, Ritti-Dias R, Christofaro DGD, Farah BQ. Association between Sleep Quality and Cardiac Autonomic Modulation in Adolescents: A Cross Sectional Study. Sleep Sci 2023; 16:e462-e467. [PMID: 38197026 PMCID: PMC10773521 DOI: 10.1055/s-0043-1776750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 04/06/2023] [Indexed: 01/11/2024] Open
Abstract
Objective To analyze the impact of sleep quality/duration on cardiac autonomic modulation on physically active adolescents with obesity. Materials and Methods The present cross-sectional study included 1,150 boys with a mean age of 16.6 ± 1.2 years. The assessment of cardiac functions included the frequency domain of heart rate variability (HRV; low frequency - LF; high frequency - HF; and the ratio between these bands -LF/HF -, defined as the sympathovagal balance), and each parameter was categorized as low / high . Physical activity levels and sleep quality/duration were obtained by questionnaires. Abdominal obesity was assessed and defined as waist circumference > 80 th percentile. Results Poor sleep quality resulted in lower HF (odds ratio [OR]: 1.8; 95% confidence interval [95%CI]: 1.01-3.21]) regardless of physical activity and abdominal obesity. Moreover, the study found no association between sleep duration and HRV parameters in adolescents. Conclusion Sleep quality, not sleep duration, reduces parasympathetic cardiac modulation apart from other factors such as physical activity and abdominal obesity in adolescents.
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Affiliation(s)
- Ozeas de Lima Lins-Filho
- Department of Medicine, Post-Graduate Program in Health Sciences, Universidade de Pernambuco, Recife, PE, Brazil
| | - Aluisio Andrade-Lima
- Department of Physical Education, Universidade Federal do Sergipe, Aracaju, SE, Brazil
| | - Auguste Daniel Torres
- Department of Kinesiology, California State University, San Bernardino, San Bernardino, CA, United States of America
| | - Luciano Machado Oliveira
- Post-Graduate Program in Physical Education, Department of Physical Education, Universidade Federal de Pernambuco, Recife, PE, Brazil
- Post-graduate programa in Nutrition, Physical Activity, and Phenotypic Plasticity, Department of Physical Education, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Vitória de Santo Antão, PE, Brazil
| | - Wagner Luiz do-Prado
- Department of Kinesiology, California State University, San Bernardino, San Bernardino, CA, United States of America
| | - Raphael Ritti-Dias
- Post-Graduate Program in Rehabilitation Sciences, Department of Physical Education, Universidade Nove de Julho, São Paulo, SP, Brazil
| | | | - Breno Quintella Farah
- Post-Graduate Program in Physical Education, Department of Physical Education, Universidade Federal de Pernambuco, Recife, PE, Brazil
- Department of Physical Education, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil
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Dwivedi A, Malik S, Rani S. Evaluation of social jetlag and chronotypes in Indian school-going adolescents. Indian J Psychiatry 2023; 65:1137-1142. [PMID: 38249148 PMCID: PMC10795660 DOI: 10.4103/indianjpsychiatry.indianjpsychiatry_72_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 08/30/2023] [Accepted: 11/07/2023] [Indexed: 01/23/2024] Open
Abstract
Background School-going students' school time acts as a zeitgeber during the weekdays, and in the weekends, due to the absence of the zeitgeber, they show free run and wake up late in the morning. This may result in poor health hazards in adolescents. Objective The aim of this study was to assess the prevalence of social jetlag along with the distribution of their chronotype in school-going adolescents. Materials and Methods This is a cross-sectional study conducted between May and June 2019 with the help of the MCTQ (Munich Chronotype Questionnaire) and MEQ (Morningness and Eveningness Questionnaire) in the adolescent population (N = 1154). Statistical Analysis The study was performed using the Mann-Whitney U test to compare continuous variables of sleep parameters between workdays and free days. The significance was taken at P < 0.05. Results The results showed that out of the total population, 81% were morning type and 67% of adolescents were socially jetlagged. There was a significant delay in the time to bed on free days by 1.88 hours and a significant delay in the wake-up time by 2.46 hours. The total sleep duration was also significantly higher on free days by 1.88 hours in the population. Conclusion This is our first study in the Indian population to show that morning-type individuals showed irregular sleep timings and were more socially jetlagged. This needs to be focused on by the school authorities and government to keep a flexible school timing for the students on the basis of their chronotype for their better academic performance.
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Affiliation(s)
- Anshu Dwivedi
- Department of Zoology, Biological Rhythm Research Unit, University of Lucknow, Lucknow, Uttar Pradesh, India
| | - Shalie Malik
- Department of Zoology, Biological Rhythm Research Unit, University of Lucknow, Lucknow, Uttar Pradesh, India
| | - Sangeeta Rani
- Department of Zoology, Biological Rhythm Research Unit, University of Lucknow, Lucknow, Uttar Pradesh, India
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Waters AM, Gibson L, Sluis RA, Modecki KL. Using Nightly Sleep Guidelines to Address Links Between Adolescents' Self-Reported Weekly Sleep Patterns and Anxiety and Depression Symptoms. Child Psychiatry Hum Dev 2023:10.1007/s10578-023-01610-0. [PMID: 37823958 DOI: 10.1007/s10578-023-01610-0] [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] [Accepted: 09/12/2023] [Indexed: 10/13/2023]
Abstract
Short and long nightly sleep durations are associated with anxiety and depression symptoms among adolescents. However, studies have not used recommended hours of nightly sleep or focused on sleep patterns across weekdays and weekends in examining links with anxiety and depression symptoms. The present study included 709 adolescents in Grade 11 (402 females; 307 males) who self-reported hours of sleep on weeknights and weekends and anxiety and depression symptoms. Using the recommended 8-10 h to define average nightly sleep for adolescents, sleep patterns across weekdays and weekends were categorised into seven classes: short stable, short increasing, average decreasing, average stable, average increasing, long decreasing, and long stable. Relative to average stable sleepers, short stable, short increasing, and long stable sleepers had significantly higher anxiety and depression. Adolescents require 8-10 h of sleep on weeknights, regardless of weekends, for optimal emotional wellbeing.
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Affiliation(s)
- Allison M Waters
- School of Applied Psychology and Centre for Mental Health, Griffith University, Mount Gravatt Campus, Brisbane, Australia.
| | - Lily Gibson
- School of Applied Psychology and Centre for Mental Health, Griffith University, Mount Gravatt Campus, Brisbane, Australia
| | - Rachel A Sluis
- School of Applied Psychology and Centre for Mental Health, Griffith University, Mount Gravatt Campus, Brisbane, Australia
| | - Kathryn L Modecki
- School of Applied Psychology and Centre for Mental Health, Griffith University, Mount Gravatt Campus, Brisbane, Australia
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Choi Y, Kim S, Lee M, Lee HI, Song K, Suh J, Chae HW, Kim HS, Kwon A. Effect of catch-up sleep on obesity in Korean adolescents: a nationwide cross-sectional study. Front Pediatr 2023; 11:1213558. [PMID: 37565249 PMCID: PMC10410257 DOI: 10.3389/fped.2023.1213558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 07/04/2023] [Indexed: 08/12/2023] Open
Abstract
Background Adolescents have weekday/weekend sleep discrepancies and may compensate for weekday sleep debt through sleep extension on weekends. Objective We investigated the effects of total sleep duration on weekdays/weekends on obesity and determined if weekend catch-up sleep has an ameliorating effect on obesity in Korean adolescents. Methods Using data from the KNHANES VII, 1,306 middle and high school students were assessed for total sleep duration on weekdays, weekends, and the entire week, as well as weekend sleep extension. Participants were classified into four groups according to weekend sleep extension. Results Total sleep duration and weekend sleep duration were negatively associated with body mass index z-score. Increased weekend sleep duration and sleep extension on weekends decreased the relative risk of overweight/obesity with each 30 min increment, reducing the risk by a factor of 0.39 and 0.93, respectively. The risk of overweight/obesity in adolescents who slept less than 6 h on weekdays increased by a factor of 1.93 when they slept for less than 3 h on weekends. Conclusion Weekend catch-up sleep had a negative dose-dependent association with obesity in Korean adolescents. Sleeping longer on weekends may be associated with a decreased risk of obesity, even if the adolescent obtains less sleep during weekdays. However, further prospective studies are needed to establish the causality between extended weekend sleep and obesity.
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Affiliation(s)
- Youngha Choi
- Department of Pediatrics, Kangwon National University Hospital, Chuncheon, Republic of Korea
| | - Sujin Kim
- Department of Pediatrics, Severance Children’s Hospital, Institute of Endocrinology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Myeongseob Lee
- Department of Pediatrics, Severance Children’s Hospital, Institute of Endocrinology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hae In Lee
- Department of Pediatrics, CHA Gangnam Medical Center, CHA University, Seoul, Republic of Korea
| | - Kyungchul Song
- Department of Pediatrics, Severance Children’s Hospital, Institute of Endocrinology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Junghwan Suh
- Department of Pediatrics, Severance Children’s Hospital, Institute of Endocrinology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hyun Wook Chae
- Department of Pediatrics, Severance Children’s Hospital, Institute of Endocrinology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ho-Seong Kim
- Department of Pediatrics, Severance Children’s Hospital, Institute of Endocrinology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ahreum Kwon
- Department of Pediatrics, Severance Children’s Hospital, Institute of Endocrinology, Yonsei University College of Medicine, Seoul, Republic of Korea
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Arrona-Palacios A, Díaz-Morales JF, Duffy JF. The influence of a permanent double-shift school start time on adolescent sleep and chronotype across different age groups. Chronobiol Int 2023; 40:850-863. [PMID: 37212086 DOI: 10.1080/07420528.2023.2215343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 03/27/2023] [Accepted: 05/12/2023] [Indexed: 05/23/2023]
Abstract
The main objective of this study was to explore the differences in sleep habits and chronotype across different age groups in Mexican adolescents attending a permanent double-shift school system. This cross-sectional study consisted of 1,969 (1,084 girls) students from public elementary, secondary, and high schools, as well as undergraduate university students from Mexico. Age range was 10-22 [15.33 ± 3.28 (mean ± SD)] years, 988 morning shift and 981 afternoon shift students. Questions regarding usual self-reported bedtime and rise time were collected, and from that, estimates for time in bed, midpoint of sleep, social jetlag, and chronotype were evaluated. Afternoon shift students reported later rise times, bedtimes, midpoint of sleep, and longer time in bed on school days than morning shift students, as well as less social jetlag. Overall, afternoon shift students reported a later chronotype than morning shift students. Peak lateness of chronotype in afternoon shift students was at age 15, with girls peaking at age 14 and boys at age 15. Meanwhile, morning shift students reported peak lateness of chronotype around age 20. In this study, adolescents from different age ranges attending an extremely delayed school start time reported adequate sleep compared with adolescents attending a fixed morning school start time. In addition, the analysis presented in this study seems to suggest that the peak of late chronotype may be influenced by school start times.
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Affiliation(s)
- Arturo Arrona-Palacios
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, USA
- Writing Lab, Institute for the Future of Education, Tecnologico de Monterrey, Monterrey, Mexico
| | - Juan F Díaz-Morales
- Department of Social Psychology, Work and Individual Differences, Faculty of Psychology, Complutense University of Madrid, Madrid, Spain
| | - Jeanne F Duffy
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, USA
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11
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Cezário RR, Freitas D, Chahad-Ehlers S. Chronotype as a predictor of scholar performance in a full-time middle school. BRAZ J BIOL 2023; 83:e272072. [PMID: 37283338 DOI: 10.1590/1519-6984.272072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/28/2023] [Indexed: 06/08/2023] Open
Abstract
The performance of day-to-day tasks, whether satisfactory or unsatisfactory, varies due to several environmental synchronizers, including the 24-hour light-dark cycle. For instance, human performance on physical and/or cognitive demanding activities reaches its peak during the day when the body temperature is at its circadian peak. Individual differences in the circadian peaks in temperature along with individuals' timing of sleep is referred to as chronotype. Here, we aimed to answer if (a) chronotypes affect the performance of students in a Brazilian full-time school with an early start time and if (b) there are differences in performance based on chronotype. We expected to find (a) a positive effect of the morning chronotype on the students' performance, particularly in subjects that take place in early morning; (b) while a negative effect of the evening chronotype in that same period. To address the effect of the chronotype on the students' scholar performance we build a Generalized Linear Mixed Model (GLMM). Results support the hypothesis that the students' performance is partially attributed to their chronotype. In particular, our findings shows that evening-type students are expected to have an increase of 0.038 (p ≤0.05) log counts on their performance in Portuguese classes compared to other chronotypes. Here we add evidence for the effect that individual chronotypes have on the students' performance in a Brazilian full-time middle school. Distinctive features of the studied Brazilian full-time middle school related to chronotypes are discussed.
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Affiliation(s)
- R R Cezário
- Universidade de São Paulo - USP, Department of Biology, Graduate Program in Entomology, Ribeirão Preto, SP, Brasil
| | - D Freitas
- Universidade Federal de São Carlos - UFSCar, Center for Education and Human Sciences, Department of Teaching Methodology, São Carlos, SP, Brasil
| | - S Chahad-Ehlers
- Universidade Federal de São Carlos - UFSCar, Department of Genetics and Evolution, São Carlos, SP, Brasil
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12
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Yeo SC, Lai CKY, Tan J, Lim S, Chandramoghan Y, Tan TK, Gooley JJ. Early morning university classes are associated with impaired sleep and academic performance. Nat Hum Behav 2023; 7:502-514. [PMID: 36806401 PMCID: PMC10129866 DOI: 10.1038/s41562-023-01531-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 01/17/2023] [Indexed: 02/22/2023]
Abstract
Attending classes and sleeping well are important for students' academic success. Here, we tested whether early morning classes are associated with lower attendance, shorter sleep and poorer academic achievement by analysing university students' digital traces. Wi-Fi connection logs in 23,391 students revealed that lecture attendance was about ten percentage points lower for classes at 08:00 compared with later start times. Diurnal patterns of Learning Management System logins in 39,458 students and actigraphy data in 181 students demonstrated that nocturnal sleep was an hour shorter for early classes because students woke up earlier than usual. Analyses of grades in 33,818 students showed that the number of days per week they had morning classes was negatively correlated with grade point average. These findings suggest concerning associations between early morning classes and learning outcomes.
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Affiliation(s)
- Sing Chen Yeo
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Clin K Y Lai
- Institute for Applied Learning Sciences and Educational Technology, National University of Singapore, Singapore, Singapore
| | - Jacinda Tan
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Samantha Lim
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Yuvan Chandramoghan
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Teck Kiang Tan
- Institute for Applied Learning Sciences and Educational Technology, National University of Singapore, Singapore, Singapore
| | - Joshua J Gooley
- Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore.
- Institute for Applied Learning Sciences and Educational Technology, National University of Singapore, Singapore, Singapore.
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13
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Hassinger AB, Monegro A, Perez G. Parental survey of the sleep patterns and screen time in US school children during the first 6 months of the COVID-19 pandemic. BMC Pediatr 2023; 23:65. [PMID: 36750939 PMCID: PMC9905756 DOI: 10.1186/s12887-023-03875-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 01/27/2023] [Indexed: 02/09/2023] Open
Abstract
BACKGROUND This study compared sleep duration, screen exposure and sleep quality in school-aged children before COVID-19 to that during school closures and again when schools re-opened in fall 2020. METHODS Cross-sectional anonymous, online survey of parents of children 5-13 years old. Questions elicited information about sleep timing and quality, screen time, and schooling at three distinct periods: before the pandemic, when schools first closed and then re-opened in the fall. RESULTS Respondents described 101 children who were an average of 8.5 years old and 51% male. In lockdown, children slept 25 min more (95%CI 00:13-00:38) due to later wake times (75 min, 95% CI 0:57-1:34) with later bedtimes (29 min, 95%CI 0:00-0:58). When schools re-opened, sleep duration returned to pre-pandemic levels, but sleep onset and offset times remained later. Despite more sleep, sleep quality and habits (e.g. bedtime refusal) worsened during lockdown and did not normalize in fall 2020. During lockdown, screen time increased in 65% of all children, and 96% of those in private schools. When schools reopened, 78% of children in hybrid/virtual learning had more than 4 h of screen exposure daily. Less screen time was associated with twofold higher odds of better sleep (OR 2.66, 95%CI 1.15-6.14). CONCLUSIONS Although school-aged children had more total sleep when schools were closed, sleep quality and habits worsened. Upon return to school, sleep times and quality did not normalize and were linked to screen time.
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Affiliation(s)
- Amanda B. Hassinger
- grid.273335.30000 0004 1936 9887Department of Pediatrics, Division of Pulmonary and Sleep Medicine, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, 1001 Main Street, 5Th Floor, Buffalo, NY 14203 USA
| | - Alberto Monegro
- grid.273335.30000 0004 1936 9887Department of Internal Medicine and Pediatrics, Division of Pulmonary, Critical Care and Sleep Medicine, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY USA
| | - Geovanny Perez
- grid.273335.30000 0004 1936 9887Department of Pediatrics, Division of Pulmonary and Sleep Medicine, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, 1001 Main Street, 5Th Floor, Buffalo, NY 14203 USA
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14
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What happened among Japanese children from school closure due to COVID-19 after school re-opening? Changes in sleep habits and dietary intake. J Nutr Sci 2023; 12:e8. [PMID: 36721722 PMCID: PMC9869102 DOI: 10.1017/jns.2022.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 12/09/2022] [Indexed: 01/24/2023] Open
Abstract
The present study aimed to (1) examine the changes in sleep habits and dietary intake among school-aged children after the school re-opening from a 3-month closure (without school lunch) due to the COVID-19 pandemic, and (2) examine whether the changes differ between those with different temporal patterns of sleep and eating during school closure, namely, 'Very early', 'Early', 'Late' and 'Very late'. The latter patterns were characterised by later timings of wake up, breakfast and lunch. Questionnaires were answered twice by 4084 children (aged 8-15 years), themselves and/or their parents: first in June 2020 (for assessing lifestyle during school closure) and second, from July 2020 to February 2021 (for assessing lifestyle after school opening). After school re-opening, the participants' wake-up time became an hour earlier (95 % CI 1⋅0, 1⋅1) and sleep duration got 0⋅94 h shorter (95 % CI 0⋅91, 0⋅97) than during school closure. An increase in dietary intake was observed for thiamine, vitamin B6, potassium, fruits and dairy products, and a decrease was observed for sugars (as foods) and confectioneries and sweetened beverages, despite small effect sizes (Cohen's d: 0⋅20-0⋅30). Significant changes in wake-up time, sleep duration and sweetened beverage intake were observed among children with the latter temporal patterns. Thus, children wake up earlier and sleep for shorter durations after school re-opening than during school closure; however, changes in dietary intake were generally insignificant. Dietary intake among school-aged children in Japan during school closure (without school lunch) might not be worse than that during school days with universal school lunch.
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15
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Long Z, Zhao A, Chen Y, Li R, Xia Y, Guo Y, Li S. The associations of chronotype and social jetlag with prosocial behavior problems among Chinese adolescents. Chronobiol Int 2022; 39:1498-1507. [PMID: 36154358 DOI: 10.1080/07420528.2022.2127362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Potential relevance between the circadian rhythm and behavioral health has got raising attention in recent years. This study aimed to examine chronotype, social jetlag and their associations with prosocial behavior problems among Chinese adolescents. A total of 4,666 middle school students aged 12-18 years were enrolled in study. Sleep characteristics were collected by the modified Chinese version of Adolescent Sleep Hygiene Scale (M-ASHS); MSFsc and mid-sleep point were calculated to determine chronotypes and social jetlag. Prosocial behavior problems were assessed by the Strength and Difficult Questionnaire (SDQ). Multivariate logistic regression was applied to analyze the relationships between chronotype and social jetlag with prosocial behavior problems. Evening chronotype was associated with higher risk of prosocial behavior problems, whether among male (OR = 1.82, 95%CI:1.27-2.61, P = .001) or female adolescents (OR = 1.83, 95%CI:1.15-2.91, P = .011). Female adolescents with social jetlag of 1-2 hours had 1.60 times the risk of prosocial behavior problems than their peers whose social jetlag was <1 h (P = .028); social jetlag ≥ 2 h was positively associated with prosocial behavior problems in both male and female adolescents (OR = 1.79 and 2.45, respectively, both P < .05). Further, the combination of intermediate chronotype and social jetlag ≥ 2 h was correlated with prosocial behavior problems only in female adolescents (OR = 3.24, 95%CI = 1.40-9.21, P = .004). Evening chronotype and higher social jetlag were risk factors for prosocial behavior problems in adolescents, especially for the female. For the promotion of prosocial behavior in adolescents, the importance of circadian rhythm should be addressed.
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Affiliation(s)
- Zichong Long
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Anda Zhao
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiting Chen
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Rong Li
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuanqing Xia
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yongmei Guo
- Department of Neurology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shenghui Li
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,MOE - Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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16
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Relationships between Sleep Duration, Timing, Consistency, and Chronotype with Myopia among School-Aged Children. J Ophthalmol 2022; 2022:7071801. [PMID: 35903175 PMCID: PMC9325560 DOI: 10.1155/2022/7071801] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 06/22/2022] [Indexed: 11/17/2022] Open
Abstract
Background The role of sleep in childhood myopia has been a research focus; however, the existing evidence is conflicting on sleep duration and timing, and as yet, no studies involve sleep consistency and chronotype. This study is done to make multiple-perspective analyses on the associations between sleep variables and myopia. Methods A population-based cross-sectional study was conducted in Shanghai, China, which included 10,142 school-aged children (7–12 years old, 53.2% boys). The Chinese version of the Children's Sleep Habits Questionnaire (CSHQ) was used to assess sleep variables. Propensity score matching was adopted to balance the difference of covariates between nonmyopic and myopic groups. Logistic regression models were implemented to examine the associations between sleep variables and myopia. Results Sleep duration and timing, mainly during weekdays, were correlated with myopia in a dose-dependent pattern, in which longer sleep duration was associated with decreased risk of myopia (9-10 hours/day: odds ratio (OR) = 0.87; ≥10 hours/day: OR = 0.77; by comparison with <9 hours/day); later bedtime (9 pm to 9:30 pm: OR = 1.46; 9:30 pm to 10 pm: OR = 1.51; 10 pm and after: OR = 2.08; by comparison with before 9 pm) and later wake-up time (7 am and after: OR = 1.36; by comparison with before 6:30 am) increased the risk (all P < 0.05). Moreover, longer weekend catch-up sleep duration and intermediate and evening chronotype were positively correlated with myopia, while social jetlag was associated with a lower odds of myopia. All these findings were also similarly observed in the matching sample. Conclusions Multiple dimensions of sleep were involved in childhood myopia. In addition to sleep duration and timing, sleep consistency and chronotype were also strictly related to myopia. More studies are needed to enrich the current evidence, thus further clarifying the association between sleep and childhood myopia.
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17
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Tonon AC, Constantino DB, Amando GR, Abreu AC, Francisco AP, de Oliveira MAB, Pilz LK, Xavier NB, Rohrsetzer F, Souza L, Piccin J, Caye A, Petresco S, Manfro PH, Pereira R, Martini T, Kohrt BA, Fisher HL, Mondelli V, Kieling C, Hidalgo MPL. Sleep disturbances, circadian activity, and nocturnal light exposure characterize high risk for and current depression in adolescence. Sleep 2022; 45:6582017. [DOI: 10.1093/sleep/zsac104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 04/21/2022] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study Objectives
Major depressive disorder (MDD) in adolescence is associated with irregularities in circadian rhythms and sleep. The characterization of such impairment may be critical to design effective interventions to prevent development of depression among adolescents. This study aimed to examine self-reported and actimetry-based circadian rhythms and sleep–wake behavior associated with current MDD and high risk (HR) for MDD among adolescents.
Methods
Ninety-six adolescents who took part in the IDEA-RiSCo study were recruited using an empirically developed depression-risk stratification method: 26 classified as low risk (LR), 31 as HR, and 39 as a current depressive episode (MDD). We collected self-report data on insomnia, chronotype, sleep schedule, sleep hygiene as well as objective data on sleep, rest-activity, and light exposure rhythms using actimetry for 10 days.
Results
Adolescents with MDD exhibited more severe insomnia, shorter sleep duration, higher social jetlag (SJL), lower relative amplitude (RA) of activity, and higher exposure to artificial light at night (ALAN) compared with the other groups. They also presented poorer sleep hygiene compared with the LR group. The HR group also showed higher insomnia, lower RA, higher exposure to ALAN, and higher SJL compared with the LR group.
Conclusions
HR adolescents shared sleep and rhythm alterations with the MDD group, which may constitute early signs of depression, suggesting that preventive strategies targeting sleep should be examined in future studies. Furthermore, we highlight that actimetry-based parameters of motor activity (particularly RA) and light exposure are promising constructs to be explored as tools for assessment of depression in adolescence.
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Affiliation(s)
- André Comiran Tonon
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
| | - Débora Barroggi Constantino
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
| | - Guilherme Rodriguez Amando
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
| | - Ana Carolina Abreu
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
| | - Ana Paula Francisco
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
| | - Melissa Alves Braga de Oliveira
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
| | - Luísa K Pilz
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
| | - Nicóli Bertuol Xavier
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
| | - Fernanda Rohrsetzer
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
- Division of Child & Adolescent Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) , Porto Alegre , Brazil
| | - Laila Souza
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
- Division of Child & Adolescent Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) , Porto Alegre , Brazil
| | - Jader Piccin
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
- Division of Child & Adolescent Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) , Porto Alegre , Brazil
| | - Arthur Caye
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
- Division of Child & Adolescent Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) , Porto Alegre , Brazil
| | - Sandra Petresco
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
- Division of Child & Adolescent Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) , Porto Alegre , Brazil
| | - Pedro H Manfro
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
| | - Rivka Pereira
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
- Division of Child & Adolescent Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) , Porto Alegre , Brazil
| | - Thaís Martini
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
- Division of Child & Adolescent Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) , Porto Alegre , Brazil
| | - Brandon A Kohrt
- Division of Global Mental Health, Department of Psychiatry, School of Medicine and Health Sciences, The George Washington University , Washington, DC , USA
| | - Helen L Fisher
- King’s College London, Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience , London , UK
- ESRC Centre for Society and Mental Health, King’s College London , London , UK
| | - Valeria Mondelli
- King’s College London, Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience , London , UK
- National Institute for Health Research Mental Health Biomedical Research Centre, South London and Maudsley NHS Foundation Trust and King’s College London , London , UK
| | - Christian Kieling
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Departament of Psychiatry, Universidade Federal do Rio Grande do Sul , Porto Alegre , Brazil
- Division of Child & Adolescent Psychiatry, Hospital de Clínicas de Porto Alegre (HCPA) , Porto Alegre , Brazil
| | - Maria Paz Loayza Hidalgo
- Laboratório de Cronobiologia e Sono, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
- Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre/RS , Brazil
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Putilov AA. Weekend sleep after early and later school start times confirmed a model-predicted failure to catch up sleep missed on weekdays. Sleep Breath 2022; 27:709-719. [PMID: 35657472 PMCID: PMC9164574 DOI: 10.1007/s11325-022-02648-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/30/2022] [Accepted: 05/17/2022] [Indexed: 12/16/2022]
Abstract
Background Many people believe they sleep for longer time on weekend nights to make up for sleep lost on weekdays. However, results of simulations of risetimes and bedtimes on weekdays and weekends with a sleep–wake regulating model revealed their inability to prolong weekend sleep. In particular, they predicted identical durations of weekend sleep after weeks with relatively earlier and relatively later risetime on weekdays. In the present study, this paradoxical prediction was empirically confirmed. Methods Times in bed were calculated from weekday and weekend risetimes and bedtimes in pairs of samples of students with early and later school start time and in subsets of samples from 7 age groups with weekday risetime earlier and later than 7:00 a.m. Results Among 35 pairs of students, mean age ± standard deviation was 14.5 ± 2.9 years and among the age group samples, 21.6 ± 14.6 years. As predicted by the simulations, times in bed on weekends were practically identical in the samples with early and later school start time and in two subsets with earlier and later weekday risetime. Conclusions The model-based simulations of sleep times can inform an individual about an amount of irrecoverable loss of sleep caused by an advance shift of wakeups on weekdays. Supplementary Information The online version contains supplementary material available at 10.1007/s11325-022-02648-5.
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Affiliation(s)
- Arcady A Putilov
- Laboratory of Sleep/Wake Neurobiology, the Institute of Higher Nervous Activity and Neurophysiology of the Russian Academy of Sciences, Moscow, Russia. .,Research Group for Math-Modeling of Biomedical Systems, Research Institute for Molecular Biology and Biophysics of the Federal Research Centre for Fundamental and Translational Medicine, Novosibirsk, Russia. .,, Berlin, Germany.
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19
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Rodríguez Ferrante G, Goldin AP, Sigman M, Leone MJ. Chronotype at the beginning of secondary school and school timing are both associated with chronotype development during adolescence. Sci Rep 2022; 12:8207. [PMID: 35581310 PMCID: PMC9114414 DOI: 10.1038/s41598-022-11928-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 05/03/2022] [Indexed: 11/09/2022] Open
Abstract
The misalignment between late chronotypes and early school start times affect health, performance and psychological well-being of adolescents. Here we test whether, and how, the baseline chronotype (i.e. chronotype at the beginning of secondary school) and the school timing affect the magnitude and the direction of the developmental change in chronotype during adolescence. We evaluated a sample of Argentinian students (n = 259) who were randomly assigned to attend school in the morning (07:45 a.m.–12:05 p.m.), afternoon (12:40 p.m.–05:00 p.m.) or evening (05:20 p.m.–09:40 p.m.) school timings. Importantly, chronotype and sleep habits were assessed longitudinally in the same group of students along secondary school (at 13–14 y.o. and 17–18 y.o.). Our results show that: (1) although chronotypes partially align with class time, this effect is insufficient to fully account for the differences observed in sleep-related variables between school timings; (2) both school timing and baseline chronotype are independently associated with the direction and the magnitude of change in chronotype, with greater delays related to earlier baseline chronotypes and later school timings. The practical implications of these results are challenging and should be considered in the design of future educational timing policies to improve adolescents’ well-being.
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Affiliation(s)
- Guadalupe Rodríguez Ferrante
- Laboratorio de Neurociencia, Universidad Torcuato Di Tella, CONICET, Av. Figueroa Alcorta, C1428BCW, CABA, C1428BIJ7350, Buenos Aires, Argentina.,Laboratorio de Cronobiología, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, CONICET, Roque S. Peña 352, B1876BXD Bernal, Buenos Aires, Argentina
| | - Andrea Paula Goldin
- Laboratorio de Neurociencia, Universidad Torcuato Di Tella, CONICET, Av. Figueroa Alcorta, C1428BCW, CABA, C1428BIJ7350, Buenos Aires, Argentina
| | - Mariano Sigman
- Laboratorio de Neurociencia, Universidad Torcuato Di Tella, CONICET, Av. Figueroa Alcorta, C1428BCW, CABA, C1428BIJ7350, Buenos Aires, Argentina.,Facultad de Lenguas y Educación, Universidad Nebrija, Madrid, Spain
| | - María Juliana Leone
- Laboratorio de Neurociencia, Universidad Torcuato Di Tella, CONICET, Av. Figueroa Alcorta, C1428BCW, CABA, C1428BIJ7350, Buenos Aires, Argentina. .,Laboratorio de Cronobiología, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, CONICET, Roque S. Peña 352, B1876BXD Bernal, Buenos Aires, Argentina.
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20
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Sugimoto M, Murakami K, Sasaki S. Temporal patterns of sleep and eating among children during school closure in Japan due to COVID-19 pandemic: associations with lifestyle behaviours and dietary intake. Public Health Nutr 2022; 26:1-15. [PMID: 35570702 DOI: 10.1017/s1368980022001148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To identify temporal patterns of sleep and eating among school-age children during school closure due to the COVID-19 pandemic and to examine their associations with lifestyle behaviours and dietary intake. DESIGN In this cross-sectional study, questionnaires were used to assess sleep and eating times, lifestyle behaviours and dietary intake during school closure. Latent class analysis was performed to identify temporal patterns of sleep and eating based on self-reported clock times for wake-up, going to bed and eating meals. Lifestyle behaviours and dietary intake were compared between latent classes. SETTING Forty-eight primary and secondary schools in Japan. PARTICIPANTS Totally, 6220 children (aged 8-15 years). RESULTS Four patterns, labelled 'Very early (20 % of children)', 'Early (24 %)', 'Late (30 %)' and 'Very late (26 %),' were identified and ordered according to the circadian timing. Latter patterns were characterised by later timings of sleep and eating, especially in clock times for wake-up, breakfast and lunch compared with earlier patterns. Children with latter patterns had a less physically active lifestyle, longer screen time (≥4 h/d), shorter study time (<2 h/d) and more frequent skipping of breakfast and lunch than those with earlier patterns. In addition, children with latter patterns had lower intakes of several vitamins, vegetables, fruits, fish and shellfish and dairy products and higher intakes of sugar and confectionaries and sweetened beverages. CONCLUSION More than half of the participants had later wake-up, breakfast and lunch during school closure, which was associated with more unfavourable lifestyles and dietary intakes.
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Affiliation(s)
- Minami Sugimoto
- Institute for Future Initiatives, The University of Tokyo, Tokyo, Japan
| | - Kentaro Murakami
- Department of Social and Preventive Epidemiology, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
| | - Satoshi Sasaki
- Department of Social and Preventive Epidemiology, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan
- Department of Social and Preventive Epidemiology, Division of Health Sciences and Nursing, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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21
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Giannoumis M, Mok E, Borkhoff CM, Birken CS, Maguire J, Parkin PC, Li P, Constantin E. Association of accelerometry-derived social jetlag and sleep with temperament in children less than 6 years of age. J Clin Sleep Med 2022; 18:1993-1999. [PMID: 35532114 PMCID: PMC9340604 DOI: 10.5664/jcsm.10056] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVES Social jetlag (SJL) measures the discrepancy between circadian and social clocks. Using accelerometry-derived data, our objective was to assess the prevalence of SJL in young healthy children and determine the association of SJL and sleep with temperament. METHODS Of 117 children participating in TARGet Kids!, a Canadian cohort of healthy preschool-aged children, 78 children (39 girls (50%)); mean age [SD]: 35.1[20.5] months) were included. Sleep was measured objectively using accelerometry. Temperament dimensions (surgency, negative affectivity, and effortful control) were assessed with the very short forms of Rothbart's child and infant behavior questionnaires. We examined associations of SJL and sleep with temperament using multivariable linear regression models adjusted for sex, age, ethnicity, and preschool/daycare attendance. RESULTS 20 out of 78 (25.6%) experienced SJL of greater than 30 minutes. SJL was greater in children who attended preschool/daycare compared with children who did not (26.3[18.8]min vs. 17.6[14.8]min; p<0.05). There was no evidence of an association between SJL and any temperament dimension. We found evidence of an association between increased sleep duration and increased negative affectivity scores (longer 24h sleep (ß:0.347, 95% CI:0.182,0.512, p<0.0001); longer nighttime sleep duration (ß:0.413, 95% CI:0.163,0.663, p=0.002)). CONCLUSIONS In our cohort, 1 in 4 preschool-aged children experienced SJL. Increased sleep duration was associated with increased negative affect, which could have implications for children developing internalizing behavior such as depression or low-self-esteem. We found that sleep duration, but not SJL, was associated with temperament and may impact daytime behavior of young children.
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Affiliation(s)
| | - Elise Mok
- Research Institute, McGill University Health Centre, Montreal, Canada
| | - Cornelia M Borkhoff
- Division of Pediatric Medicine and the Pediatric Outcomes Research Team (PORT), The Hospital for Sick Children, Toronto, Canada.,Child Health Evaluative Sciences, The Hospital for Sick Children Research Institute, Toronto, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada.,Women's College Research Institute, Women's College Hospital, Toronto, Canada
| | - Catherine S Birken
- Division of Pediatric Medicine and the Pediatric Outcomes Research Team (PORT), The Hospital for Sick Children, Toronto, Canada.,Child Health Evaluative Sciences, The Hospital for Sick Children Research Institute, Toronto, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada.,Department of Pediatrics, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Jonathon Maguire
- Division of Pediatric Medicine and the Pediatric Outcomes Research Team (PORT), The Hospital for Sick Children, Toronto, Canada.,Child Health Evaluative Sciences, The Hospital for Sick Children Research Institute, Toronto, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada.,Department of Pediatrics, Faculty of Medicine, University of Toronto, Toronto, Canada.,Applied Health Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada.,Department of Pediatrics, St. Michael's Hospital, Toronto, Canada
| | - Patricia C Parkin
- Division of Pediatric Medicine and the Pediatric Outcomes Research Team (PORT), The Hospital for Sick Children, Toronto, Canada.,Child Health Evaluative Sciences, The Hospital for Sick Children Research Institute, Toronto, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada.,Department of Pediatrics, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Patricia Li
- Research Institute, McGill University Health Centre, Montreal, Canada.,Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, Canada
| | - Evelyn Constantin
- Research Institute, McGill University Health Centre, Montreal, Canada.,Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, Canada
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22
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Ramírez C, García A, Santos I, Borrani J, Valdez P. Changes in sleep habits during the lockdown for the COVID-19 pandemic in the population and people attending a morning or an afternoon shift in Monterrey, Mexico. Chronobiol Int 2022; 39:918-935. [PMID: 35282725 DOI: 10.1080/07420528.2022.2049809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To fight the Covid-19 pandemic, most countries implemented a lockdown that involved restricting the activity and confining the population to their homes. The objective of this paper is to analyze the impact of the lockdown on sleep in people from the population of Monterrey, Mexico, and people attending a morning or afternoon work or study shift after more than a month adaptation period. Participants were 861 residents from Monterrey, Mexico, who completed an anonymous 20-minute web-based survey. The survey asked for information about sleep habits both before and during the lockdown. In Mexico, a national lockdown was declared on March 23rd, 2020. Data collection began 38 days after the start of the lockdown, from April 30th to May 23rd, 2020, allowing enough time for the participants to adjust to the new conditions. The lockdown affected the sleep of the population, producing a phase delay of the sleep-wake cycle, a reduction of sleep duration, as well as an increase in sleep latency and in time awake during night sleep, resulting in a reduction of sleep efficiency. People attending an afternoon shift also showed a phase delay and a reduction in sleep quality during the lockdown. In conclusion, the lockdown produced a delay of sleep and a reduction of sleep quality of the population, even in people with an afternoon shift. It is necessary to design and implement better strategies in the fight against the pandemic, without compromising the wellbeing of the population.
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Affiliation(s)
- Candelaria Ramírez
- Laboratory of Psychophysiology, School of Psychology, Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Aída García
- Laboratory of Psychophysiology, School of Psychology, Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Ivana Santos
- Laboratory of Psychophysiology, School of Psychology, Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Jorge Borrani
- Laboratory of Psychophysiology, School of Psychology, Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Pablo Valdez
- Laboratory of Psychophysiology, School of Psychology, Universidad Autónoma de Nuevo León, Monterrey, Mexico
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23
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Tang Y, Wan Y, Xu S, Zhang S, Hao J, Tao F. Nonlinear relationship between sleep duration and non-suicidal self-injurious behaviour among Chinese adolescents. BMC Psychiatry 2021; 21:521. [PMID: 34674680 PMCID: PMC8532314 DOI: 10.1186/s12888-021-03539-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 10/13/2021] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Previous studies have shown a positive association between sleep deprivation and non-suicidal self-injury (NSSI) among adolescents, but few studies have described the effects of oversleeping and weekend catch-up sleep on NSSI. The present study aimed to explore the nonlinear relationship between sleep duration and NSSI among Chinese adolescents. METHODS Data from China's National Adolescent Health Surveillance for the years 2014 to 2015 were collected from 15,713 students located across four provinces in China. A self-report questionnaire was used to assess sleep duration and 12-month NSSI. Binomial logistic regression models were used to examine the association between NSSI and sleep duration. The locally estimated scatter plot smoothing (LOESS) method was used to explore the associations of total NSSI number with sleep duration, and binomial regression analysis was used to test this relationship. RESULTS About 68.5% of adolescents reported sleeping less than 8 h on weeknights, while 37.8% of adolescents slept more than 10 h per night during weekends. The 12-month prevalence rate of NSSI was 29.4%. Compared to adolescents who reported weekend catch-up sleep of 0-1 h, those who slept < 0 h (adjusted odds ratio [aOR] = 1.38, 95% Confidence Interval [95% CI]: 1.16-1.64) had a higher risk of NSSI. Males who reported ≥3 h of weekend catch-up sleep had significantly increased odds of NSSI (aOR = 1.20, 95%CI: 1.01-1.42). Notably, a positive U-shaped association was observed between the sleep duration and the total NSSI number. CONCLUSIONS The findings reveal a nonlinear relationship between sleep duration and NSSI among Chinese adolescents. Therefore, it is necessary to be vigilant and screen for sleep duration among adolescents in NSSI treatment or prevention.
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Affiliation(s)
- Ying Tang
- grid.186775.a0000 0000 9490 772XDepartment of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032 Anhui China ,MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei, 230032 Anhui China ,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032 Anhui China ,grid.186775.a0000 0000 9490 772XAnhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University; No 81 Meishan Road, Hefei, 230032 Anhui China
| | - Yuhui Wan
- grid.186775.a0000 0000 9490 772XDepartment of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032 Anhui China ,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032 Anhui China ,grid.186775.a0000 0000 9490 772XAnhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University; No 81 Meishan Road, Hefei, 230032 Anhui China
| | - Shaojun Xu
- grid.186775.a0000 0000 9490 772XDepartment of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032 Anhui China ,grid.186775.a0000 0000 9490 772XAnhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University; No 81 Meishan Road, Hefei, 230032 Anhui China
| | - Shichen Zhang
- grid.186775.a0000 0000 9490 772XDepartment of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032 Anhui China ,MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei, 230032 Anhui China
| | - Jiahu Hao
- grid.186775.a0000 0000 9490 772XDepartment of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032 Anhui China ,MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei, 230032 Anhui China ,grid.186775.a0000 0000 9490 772XAnhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University; No 81 Meishan Road, Hefei, 230032 Anhui China
| | - Fangbiao Tao
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China. .,MOE Key Laboratory of Population Health Across Life Cycle, No 81 Meishan Road, Hefei, 230032, Anhui, China. .,NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, China. .,Anhui Provincial Key Laboratory of Population Health and Aristogenics, Anhui Medical University; No 81 Meishan Road, Hefei, 230032, Anhui, China.
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Estevan I, Tassino B, Vetter C, Silva A. Bidirectional association between light exposure and sleep in adolescents. J Sleep Res 2021; 31:e13501. [PMID: 34608708 DOI: 10.1111/jsr.13501] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/15/2021] [Accepted: 09/02/2021] [Indexed: 01/10/2023]
Abstract
Sleep behaviour is controlled by both circadian and homeostatic influences. Changes in both factors are related to the delayed sleep timing observed in adolescence, which also generates restrictions in their sleep duration. In addition, the circadian factor explains part of the observed influence of light on sleep duration. We recorded 15 high-school students for 23 days (vacation: 11 days; school term: 12 days) using GENEactive accelerometers. We employed a repeated-measures analysis to explore the day-to-day bidirectional association between mean light exposure and sleep behaviour across a period with extreme variability in social pressures. Sleep onset was more than 30 min earlier and sleep duration almost 20 min longer when previous day light was 10 times more intense. Light intensity had a reduction of more than 20% as sleep ended 1 hr later. Besides, sleep onset and offset were both later during vacation than on school days (almost 2 hr and 4 hr, respectively) and free days (almost 1 hr, respectively). Therefore, sleep duration was almost 2 hr longer on vacation and free days than on school days. On the other hand, light exposure intensity was twice as high during vacation days when adjusted by sleep timing. Insufficient sleep duration is a major problem for adolescents. Although we found that light exposure was associated with longer sleep duration, the influence of school start times was greater and ended up prevailing, which explained the short sleep durations observed on school days.
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Affiliation(s)
- Ignacio Estevan
- Programa de Neuropsicología y Neurobiología, Facultad de Psicología, Universidad de la República, Montevideo, Uruguay
| | - Bettina Tassino
- Sección Etología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Céline Vetter
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, USA
| | - Ana Silva
- Laboratorio de Neurociencias, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
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25
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Sun W, Kwok NTT, Chan NY, Chan JWY, Zhang J, Chan KCC, Li SX. Associations of circadian factors with insomnia symptoms and emotional and behavioral problems among school-age children. J Clin Sleep Med 2021; 17:2107-2114. [PMID: 34606443 DOI: 10.5664/jcsm.9346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVES To examine the associations of circadian characteristics (ie, chronotype and social jetlag) with insomnia symptoms and emotional and behavioral problems among school-age children. METHODS A total of 620 primary school children (medianage = 10.06, standard deviation = 1.16, 58.7% boys) were recruited and assessed by a set of parent-report questionnaires, including Children's Sleep Habit Questionnaire for measuring sleep-wake patterns and insomnia symptoms (bedtime resistance, sleep onset delay, and night waking), Children's Chronotype Questionnaire for assessing the child's chronotype preference, and Strength and Difficulties Questionnaire for assessing emotional and behavioral problems. Linear regression models were applied to examine the associations of chronotype and social jetlag with insomnia symptoms and mental health outcomes, in which age, sex, family income, and average sleep duration were entered as covariates. RESULTS Evening chronotype was significantly associated with bedtime resistance and sleep onset delay, while social jetlag was not related to insomnia symptoms. Evening chronotype was also significantly associated with externalizing symptoms after controlling for potential confounders. CONCLUSIONS Evening chronotype, but not social jetlag, was the risk factor for insomnia symptoms, and evening chronotype was further associated with increased behavioral problems in school-age children. Our findings underscored the roles of circadian factors in relation to sleep and mental health problems in this young population. CITATION Sun W, Kwok NTT, Chan NY, et al. Associations of circadian factors with insomnia symptoms and emotional and behavioral problems among school-age children. J Clin Sleep Med. 2021;17(10):2107-2114.
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Affiliation(s)
- Wanqi Sun
- Sleep Research Clinic and Laboratory, Department of Psychology, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region (SAR).,Department of Psychiatry, Shanghai Mental Health Center, People's Republic of China
| | - Natasha Tung Ting Kwok
- Sleep Research Clinic and Laboratory, Department of Psychology, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region (SAR)
| | - Ngan Yin Chan
- Sleep Research Clinic and Laboratory, Department of Psychology, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region (SAR).,Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin Hong Kong SAR
| | - Joey Wing Yan Chan
- Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin Hong Kong SAR
| | - Jihui Zhang
- Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin Hong Kong SAR.,Guang Dong Mental Health Center, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Kate Ching-Ching Chan
- Department of Pediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Shirley Xin Li
- Sleep Research Clinic and Laboratory, Department of Psychology, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region (SAR).,The State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR
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26
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Chen JH, Chen WL. Sleep trajectories from early adolescence to emerging adulthood: Evidence from a nine-year population-based study. J Adolesc 2021; 92:177-188. [PMID: 34555565 DOI: 10.1016/j.adolescence.2021.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 09/04/2021] [Accepted: 09/07/2021] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Adolescence to emerging adulthood is a developmental period when individuals experience substantial biological changes and social transitions. In East Asian societies, this period is also marked by high pressure around college entrance exams. However, little is known about how young people's sleep changes over time, or how it is impacted by social institutions in the cultural context. This study fills this gap in the literature by examining sleep trajectories from adolescence to emerging adulthood using a population-based, longitudinal sample from Taiwan. METHODS Multilevel models were applied to longitudinal data from the Taiwan Youth Project (N = 1,489) to estimate sleep trajectories from age 14 to 22 for total time in bed, bedtime, and wake-up time by gender and by educational pathway, controlling for family background. RESULTS Analysis revealed that Taiwanese youth sleep less as adolescents than as emerging adults. Gender differences exist in adolescents' sleep trajectories but narrow after age 18. Differences in weekday and weekend time in bed vary by gender and change as individuals emerge into adulthood. Finally, college attendees and high school only attendees display differences in sleep that begin in high school and continue through college. CONCLUSIONS The findings provide evidence of developmental changes in sleep from adolescence to emerging adulthood and demonstrate that sleep trajectories are gendered and socially patterned. The study is also one of the first to examine the sleep trajectories of East Asian youth and, as such, sheds light on the role of educational and cultural context as an influential factor.
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27
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Malheiros LEA, da Costa BGG, Lopes MVV, Silva KS. School schedule affects sleep, but not physical activity, screen time and diet behaviors. Sleep Med 2021; 85:54-59. [PMID: 34274812 DOI: 10.1016/j.sleep.2021.06.025] [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: 02/11/2021] [Revised: 06/16/2021] [Accepted: 06/19/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Behavioral changes during adolescence are affected by biological and social aspects. However, environment aspects, which are beyond adolescents' control, also contribute to behavior adoption, and school may have a significant impact in these behaviors. This cross-sectional study aims to investigate how lifestyle behaviors are associated with the school shift attended by high school students. METHODS The sample comprised 635 high school students (51.2% girls, 16.33 ± 1.0 years old) from Southern Brazil. Physical activities of different intensities (light and moderate-to-vigorous), sedentary behaviors, and sleep (duration, efficiency, and timing) were measured using accelerometers. Engagement in sport and non-sport activities, screen time indicators, and diet were self-reported. Linear models were fitted to compare each lifestyle behavior between the two school shifts. RESULTS Students attending the afternoon shift slept (β = 01:29 95%CI 01:13; 01:46) and woke up later (β = 01.41 95%CI 01:27; 01:54), and had a longer sleep duration (β = 00:12 95%CI 0:02; 00:21) than those attending the morning shift. However, the sleep efficiency of those in the afternoon shift was lower than their peers in the morning shift (β = -1.89 95%CI -3.01; -0.77). CONCLUSIONS School schedule was associated with sleep behaviors of adolescents, but not with other lifestyle behaviors.
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Affiliation(s)
- Luís E A Malheiros
- Núcleo de Pesquisa em Atividade Física e Saúde, Universidade Federal de Santa Catarina, Florianópolis, Brazil.
| | - Bruno G G da Costa
- Núcleo de Pesquisa em Atividade Física e Saúde, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Marcus V V Lopes
- Núcleo de Pesquisa em Atividade Física e Saúde, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Kelly S Silva
- Núcleo de Pesquisa em Atividade Física e Saúde, Universidade Federal de Santa Catarina, Florianópolis, Brazil
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Bacaro V, Gavriloff D, Lombardo C, Baglioni C. Sleep Characteristics in the Italian Pediatric Population: A Systematic Review. CLINICAL NEUROPSYCHIATRY 2021; 18:119-136. [PMID: 34909029 PMCID: PMC8629036 DOI: 10.36131/cnfioritieditore20210302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE During childhood sleep duration, quality and patterns evolve and change greatly and relate strongly to healthy development. This systematic review aims to summarize the literature on sleep characteristics in the Italian pediatric population, adopting a cultural perspective. METHOD Pubmed, PsycINFO and Medline databases were systematically searched. Eligible studies had to: include Italian children and adolescents; report data for one or more sleep-related variables; be published in English or Italian. RESULTS Twenty-nine studies were selected including 18551 Italian children or adolescents. Studies were categorized by age group: infancy and toddlerhood (0-3 years); preschool and school age (3-12 years); adolescence (12-18 years) and mixed age groups. Overall, studies showed that the Italian pediatric population present shorter sleep duration and longer sleep onset latency compared to international recommendations. Furthermore, data indicate high prevalence of dysfunctional sleep habits, such as late bed-time (all age groups), involvement of parents during bed-time (infancy and toddlerhood), and high variability between sleep times on week-days vs. weekends (adolescence). Nevertheless, most studies lacked comprehensive data on sleep patterns, focusing instead on isolated variables. CONCLUSION These results suggest a strong trend among Italian children and adolescents towards unhealthy sleep patterns. Comprehensive data are still lacking and large studies evaluating a broad range of sleep characteristics in Italian pediatric populations are needed. Data strongly suggest that Italian Pediatric Primary Care should place higher focus on sleep problems and implement clinical protocols directed towards improving sleep patterns in children and adolescents.
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Affiliation(s)
- Valeria Bacaro
- Department of Human Sciences, University of Rome Guglielmo Marconi, Rome, IT
| | - Dimitri Gavriloff
- Sleep and Circadian Neuroscience Institute, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | | | - Chiara Baglioni
- Department of Human Sciences, University of Rome Guglielmo Marconi, Rome, IT.,Department of Psychiatry and Psychotherapy, Medical Center - Faculty of Medicine, University of Freiburg, Germany
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29
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Kanellopoulou A, Notara V, Magriplis E, Antonogeorgos G, Rojas-Gil AP, Kornilaki EN, Lagiou A, Yannakoulia M, Panagiotakos DB. Sleeping patterns and childhood obesity: an epidemiological study in 1,728 children in Greece. J Clin Sleep Med 2021; 17:1093-1101. [PMID: 33576738 DOI: 10.5664/jcsm.9160] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
STUDY OBJECTIVES Sleep is an essential normal function for children's growth and development, but over the years, lifestyle changes have resulted in insufficient sleep, a factor that may be associated with increased childhood obesity. The aim of this study was to evaluate the association between sleep duration and sleep patterns separately on weekdays and weekends regarding children's weight status. METHODS This study was conducted among Greek students (55.1% girls) in 2014-2016. Children's weight status was classified according to the International Obesity Task Force tables and guidelines. Sleep duration was determined based on the sleep and wake time that children reported, separately for weekdays and weekends. Classification and regression tree analysis was used to derive sleep patterns and evaluate their relation to children's weight status. RESULTS Multiadjusted analysis revealed an inverse association between average duration of sleep on weekdays and weekends with the likelihood of being overweight/obese (odds ratio per 1 hour 0.82; 95% confidence interval, 0.73-0.92). This was more prominent on weekends than on weekdays. Children who had lower duration on weekdays, but catch-up sleep duration on weekends, were 2% (95% confidence interval, 0.97-0.99) less likely to be overweight/obese compared to those children having both less or increased sleep duration on weekdays and weekends. CONCLUSIONS Sleep duration and sleep patterns seem to be associated with childhood weight status. Interventions should be developed to educate parents on the importance of an adequate sleep duration and healthy sleep patterns for their children's healthy development.
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Affiliation(s)
- Aikaterini Kanellopoulou
- Department of Nutrition and Dietetics, School of Health Sciences & Education, Harokopio University, Athens, Greece
| | - Venetia Notara
- Department of Public and Community Health, School of Public Health, Laboratory of Hygiene and Epidemiology, University of West Attica, Athens, Greece
| | - Emmanuella Magriplis
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Greece
| | - George Antonogeorgos
- Department of Nutrition and Dietetics, School of Health Sciences & Education, Harokopio University, Athens, Greece
| | - Andrea Paola Rojas-Gil
- Department of Nursing, Faculty of Health Sciences, University of Peloponnese, Tripoli, Greece
| | - Ekaterina N Kornilaki
- Department of Preschool Education, School of Education, University of Crete, Rethymnon, Greece
| | - Areti Lagiou
- Department of Public and Community Health, School of Public Health, Laboratory of Hygiene and Epidemiology, University of West Attica, Athens, Greece
| | - Mary Yannakoulia
- Department of Nutrition and Dietetics, School of Health Sciences & Education, Harokopio University, Athens, Greece
| | - Demosthenes B Panagiotakos
- Department of Nutrition and Dietetics, School of Health Sciences & Education, Harokopio University, Athens, Greece.,Faculty of Health, University of Canberra, ACT, Australia
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He L, Li X, Wang W, Wang Y, Qu H, Zhao Y, Lin D. Clustering of multiple lifestyle behaviors among migrant, left-behind and local adolescents in China: a cross-sectional study. BMC Public Health 2021; 21:542. [PMID: 33740944 PMCID: PMC7980326 DOI: 10.1186/s12889-021-10584-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 03/05/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Influence of migration on externalized behavioral problems (e.g., aggressive) among adolescents has been well assessed, yet lifestyle behaviors of migrant, left-behind and local adolescents have been largely overlooked by researchers and policy-makers. Therefore, this study aimed to identify clustering of multiple lifestyle behaviors and their associations with migrant status among Chinese adolescents. METHODS A cross-sectional survey was conducted in 2015 in Beijing, and Wuhu city (Anhui province). Adolescents self-reported age, gender, family economic status, migrant situation, and lifestyle behaviors (i.e., physical activity, screen time, sleep, smoke, soft-drink, alcohol, fruit and vegetable consumption) via a battery of validated questionnaires. Latent class analysis was conducted to identify behavioral clusters using Mplus 7.1. ANOVA, and multivariable logistic regression were used to examine associations between migrant situations and behavioral clusters using SPSS 22. RESULTS Three distinct behavioral clusters were exhibited among 1364 students (mean age: 13.41 ± 0.84 years): "low risk" (N = 847), "moderate risk" (N = 412) and "high risk" (N = 105). The "high-risk" cluster had the highest prevalence of adolescents not meeting healthy behavioral recommendations. There were no significant differences in the prevalence of high-risk lifestyle among migrant, left-behind, rural local and urban local adolescents. But migrant adolescents had the lowest prevalence of low-risk lifestyle, followed by left-behind, rural and urban local adolescents. Moreover, compared with urban local, migrant (OR = 2.72, 95%CI: 1.88,3.94), left-behind (OR = 2.28, 95%CI: 1.46, 3.55), and rural local (OR = 1.76, 95%CI:1.03,3.01) adolescents had a higher risk of moderate-risk lifestyle. CONCLUSIONS Clustering of assessed lifestyle behaviors differed by the migrant status. Particularly, migrant and left-behind adolescents were more likely to have moderate-risk lifestyle compared with their counterparts. Interventions that promote moderate to vigorous physical activity and consumption of fruits and vegetables simultaneously are needed among them.
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Affiliation(s)
- Li He
- College of Physical Education and Sports, Beijing Normal University, Beijing, China
| | - Xiaoyan Li
- Institute of Developmental Psychology, Beijing Normal University, Beijing, China
| | - Weidong Wang
- School of Sociology and Population Studies, Renmin University of China, Beijing, China
| | - Youfa Wang
- Global Health Institute, School of Public Health, Xi'an Jiaotong University, Xi'an, China
| | - Haiyan Qu
- Department of Health Services Administration, University of Alabama at Birmingham, Birmingham, USA
| | - Yang Zhao
- The George Institute for Global Health at Peking University Health Science Centre, Beijing, China.,WHO Collaborating Centre on Implementation Research for Prevention & Control of NCDs, Melbourne, VIC, Australia
| | - Danhua Lin
- Institute of Developmental Psychology, Beijing Normal University, Beijing, China.
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Liu M, Cao B, Luo Q, Wang Q, Liu M, Liang X, Wu D, Li W, Su C, Chen J, Gong C. Associations Between Sleep Duration, Wake-Up Time, Bedtime, and Abdominal Obesity: Results From 9559 Chinese Children Aged 7-18 Years. Front Endocrinol (Lausanne) 2021; 12:735952. [PMID: 34721295 PMCID: PMC8552807 DOI: 10.3389/fendo.2021.735952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 09/27/2021] [Indexed: 01/24/2023] Open
Abstract
OBJECTIVE To investigate the associations of sleep duration, wake-up time, bedtime, and childhood abdominal obesity, and to test whether there is a weekday/weekend difference and the potential modifying role of sex. METHODS This cross-sectional study was based on the Students' Constitution and Health Survey and included 9559 students (4840 boys and 4719 girls) aged 7-18 years (7227 aged 7-12 years, 2332 aged 13-18 years). They were divided into two groups (control group and group with abdominal obesity). The physical measurements included children and youth body height, body weight, and waist circumference (WC). A parent-report questionnaire was used to collect the information about parent characteristics as well as lifestyle and sleep patterns (sleep duration, bedtime, and wake-up time of weekdays and weekends) of children and youth. RESULTS The prevalence of abdominal obesity was 30.57% and the percentages of sleep duration <9 hours/day, wake-up time before 07:00 am on weekdays and weekends, bedtime after 10:00 pm on weekends were significantly higher in the group with abdominal obesity. After adjusting for confounders, sleep duration <9 hours/day on weekends was inversely related to abdominal obesity in the overall subjects, regardless of their sex and age, while bedtime after 10:00 pm on weekends was inversely related to abdominal obesity only in the overall subjects, boys, and children aged 7-12 years. Logistic regression models in all subjects showed that shorter hours of weekends sleep duration were associated with greater risks of abdominal obesity, even after adjusting for all confounders, including wake-up time and bedtime. The adjusted odds ratios and 95% confidence intervals of abdominal obesity (with ≥10 hours/day as the reference group) for children with 9-10 hours/day, 8-9 hours/day, and <8 hours/day of weekend sleep duration were 1.23 (1.04-1.46), 1.59 (1.32-1.91) and 1.83 (1.42-2.36), respectively. Specifically, after stratification by sex and age, this phenomenon was only observed in boys and children aged 7-12 years. CONCLUSIONS Sleep duration and bedtime on weekends were independently associated with the risk of childhood abdominal obesity, particularly in boys and children aged 7-12 years.
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Affiliation(s)
- Meijuan Liu
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Bingyan Cao
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Qipeng Luo
- Department of Pain Medicine, Peking University Third Hospital, Beijing, China
| | - Qiao Wang
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Min Liu
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Xuejun Liang
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Di Wu
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Wenjing Li
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Chang Su
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Jiajia Chen
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Chunxiu Gong
- Department of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
- *Correspondence: Chunxiu Gong,
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32
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Weaver RG, Armstrong B, Hunt E, Beets MW, Brazendale K, Dugger R, Turner-McGrievy G, Pate RR, Maydeu-Olivares A, Saelens B, Youngstedt SD. The impact of summer vacation on children's obesogenic behaviors and body mass index: a natural experiment. Int J Behav Nutr Phys Act 2020; 17:153. [PMID: 33243252 PMCID: PMC7690133 DOI: 10.1186/s12966-020-01052-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 11/09/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Children's BMI gain accelerates during summer. The Structured Days Hypothesis posits that the lack of the school day during summer vacation negatively impacts children's obesogenic behaviors (i.e., physical activity, screen time, diet, sleep). This natural experiment examined the impact of summer vacation on children's obesogenic behaviors and body mass index (BMI). METHODS Elementary-aged children (n = 285, 5-12 years, 48.7% male, 57.4% African American) attending a year-round (n = 97) and two match-paired traditional schools (n = 188) in the United States participated in this study. Rather than taking a long break from school during the summer like traditional schools, year-round schools take shorter and more frequent breaks from school. This difference in school calendars allowed for obesogenic behaviors to be collected during three conditions: Condition 1) all children attend school, Condition 2) year-round children attend school while traditional children were on summer vacation, and Condition 3) summer vacation for all children. Changes in BMI z-score were collected for the corresponding school years and summers. Multi-level mixed effects regressions estimated obesogenic behaviors and monthly zBMI changes. It was hypothesized that children would experience unhealthy changes in obesogenic behaviors when entering summer vacation because the absence of the school day (i.e., Condition 1 vs. 2 for traditional school children and 2 vs. 3 for year-round school children). RESULTS From Condition 1 to 2 traditional school children experienced greater unhealthy changes in daily minutes sedentary (∆ = 24.2, 95CI = 10.2, 38.2), screen time minutes (∆ = 33.7, 95CI = 17.2, 50.3), sleep midpoint time (∆ = 73:43, 95CI = 65:33, 81:53), and sleep efficiency percentage (-∆ = 0.7, 95CI = -1.1, - 0.3) when compared to year-round school children. Alternatively, from Condition 2 to 3 year-round school children experienced greater unhealthy changes in daily minutes sedentary (∆ = 54.5, 95CI = 38.0, 70.9), light physical activity minutes (∆ = - 42.2, 95CI = -56.2, - 28.3) MVPA minutes (∆ = - 11.4, 95CI = -3.7, - 19.1), screen time minutes (∆ = 46.5, 95CI = 30.0, 63.0), and sleep midpoint time (∆ = 95:54, 95CI = 85:26, 106:22) when compared to traditional school children. Monthly zBMI gain accelerated during summer for traditional (∆ = 0.033 95CI = 0.019, 0.047) but not year-round school children (∆ = 0.004, 95CI = -0.014, 0.023). CONCLUSIONS This study suggests that the lack of the school day during summer vacation negatively impacts sedentary behaviors, sleep timing, and screen time. Changes in sedentary behaviors, screen time, and sleep midpoint may contribute to accelerated summer BMI gain. Providing structured programming during summer vacation may positively impact these behaviors, and in turn, mitigate accelerated summer BMI gain. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT03397940 . Registered January 12th 2018.
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Affiliation(s)
- R Glenn Weaver
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, USA.
| | - Bridget Armstrong
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, USA
| | - Ethan Hunt
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, USA
| | - Michael W Beets
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, USA
| | - Keith Brazendale
- Department of Health Sciences, University of Central Florida, Orlando, Florida, USA
| | - R Dugger
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, USA
| | - Gabrielle Turner-McGrievy
- Department of Health Promotion, Education, and Behavior, University of South Carolina, Columbia, SC, USA
| | - Russell R Pate
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, USA
| | | | - Brian Saelens
- Seattle Children's Hospital, Center for Child Health Behavior and Development, Seattle, Washington, USA
| | - Shawn D Youngstedt
- Arizona State University, Edson College of Nursing and Health Innovation, Phoenix, AZ, USA
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Estevan I. Psychometric properties of the Morningness/Eveningness scale for children among Uruguayan adolescents: the role of school start times. BIOL RHYTHM RES 2020. [DOI: 10.1080/09291016.2020.1846284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ignacio Estevan
- Programa de Neuropsicología y Neurobiología, Facultad de Psicología, Universidad de la República, Montevideo, Uruguay
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Tonetti L, Martoni M, Filardi M, Fabbri M, Carissimi A, Giovagnoli S, Natale V. Variation of circadian activity rhythm according to body mass index in children. Sleep Med 2020; 74:33-38. [PMID: 32836184 DOI: 10.1016/j.sleep.2020.05.022] [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: 12/17/2019] [Revised: 05/10/2020] [Accepted: 05/12/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND/OBJECTIVES This study aimed to examine the variations of circadian activity rhythm of children according to objective body mass index (BMI) values, using a novel statistical framework (ie, Functional Linear Modeling, FLM), separately for school- and weekend days. METHODS A total of 107 participants (60 females; mean age: 10.25 ± 0.48 years) wore an actigraph for seven days during a regular school-week. While valid actigraphic data during school days were available for each of these children, this number decreased to 53 (31 females; mean age: 10.28 ± 0.51 years) during weekend days. RESULTS Examining the school days, significantly higher motor activity in participants with higher BMI was observed from around 4:00 a.m. to 6:00 a.m., with a peak about 5:00 a.m. On the contrary, applying the FLM to the weekend days actigraphic data, no significantly different variation of circadian activity rhythm was observed, according to BMI. CONCLUSIONS In this specific sample of children, during school days, higher BMI is associated with higher activity level in a specific time window in the second half of nocturnal sleep. The lack of significant findings during weekend days could be explained because of higher variability of get-up time and/or the reduced sample size. Future longitudinal studies could explore if the higher motor activity in that specific time window qualifies as a predictive marker of the development of overweight and obesity. If so, early preventive strategies directed towards those at higher risk could be effectively implemented.
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Affiliation(s)
- Lorenzo Tonetti
- Department of Psychology, University of Bologna, Viale Berti Pichat 5, 40127, Bologna, Italy.
| | - Monica Martoni
- Department of Experimental, Diagnostic and Specialty Medicine, DIMES, University of Bologna, Viale Berti Pichat 5, 40127, Bologna, Italy.
| | - Marco Filardi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna, Via Altura 3, 40139, Bologna, Italy.
| | - Marco Fabbri
- Department of Psychology, University of Campania "Luigi Vanvitelli", Viale Ellittico 31, 81100, Caserta, Italy.
| | - Alicia Carissimi
- Laboratório de Cronobiologia e Sono Do Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal Do Rio Grande Do Sul (UFRGS), Ramiro Barcelos 2350, CEP 90035-003, Porto Alegre, Rio Grande do Sul, Brazil; Programa de Pós-Graduação Em Psiquiatria e Ciências Do Comportamento, Faculdade de Medicina, UFRGS, Ramiro Barcelos 2350, CEP 90035-003, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Sara Giovagnoli
- Department of Psychology, University of Bologna, Viale Berti Pichat 5, 40127, Bologna, Italy.
| | - Vincenzo Natale
- Department of Psychology, University of Bologna, Viale Berti Pichat 5, 40127, Bologna, Italy.
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35
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Estevan I, Silva A, Vetter C, Tassino B. Short Sleep Duration and Extremely Delayed Chronotypes in Uruguayan Youth: The Role of School Start Times and Social Constraints. J Biol Rhythms 2020; 35:391-404. [DOI: 10.1177/0748730420927601] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
During adolescence, biological, psychosocial, and contextual factors converge in a “perfect storm” and have been put forward to explain the delay in chronotype observed at this age and the prevalence of disrupted sleep. This study provides evidence to support that chronotype and sleep patterns (particularly sleep duration) are socially constrained and to identify novel significant social predictors. Uruguayan public school activities are arranged in up to 4 shifts, creating a natural experiment to examine the effect of school timing on questionnaire-based assessments of sleep and chronotype. In this study, 268 high school students (15-18 years old) who attended school either on morning (0730 to 1130 h) or afternoon shifts (1130 h to 1530 h) responded to an adapted School Sleep Habits Survey. Students attending afternoon shifts had later chronotypes (a 1.5-h later midpoint of sleep on free days adjusted for sleep debt) than those attending the morning shift. Besides shift, evening social activities (including dinner time) were further identified as key predictors of late chronotypes, whereas age and gender were not. Sleep on school days was overall advanced and reduced with respect to weekends, and these effects were stronger in morning-shift students. Weekend sleep duration was similar between shifts, which probably caused the prevalence of reduced sleep durations (average weekly sleep duration, SDweek <8 h) to be higher in morning-shift students (almost 80%) than in afternoon-shift ones (34%). Reduced sleep duration was significantly higher in morning-shift students. In addition, age, chronotype, and dinner time became relevant determinants of sleep deficit only in the morning-shift students. Besides the important social constraint of early school start time, this is the first study to confirm the significance of other types of social pressures on both adolescents’ chronotype and sleep deficit, which can be useful as potential new targets for effective policies to protect adolescent sleep.
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Affiliation(s)
- Ignacio Estevan
- Programa de Neuropsicología y Neurobiología, Facultad de Psicología, Universidad de la República, Uruguay
| | - Ana Silva
- Laboratorio de Neurociencias, Facultad de Ciencias, Universidad de la República, Uruguay
| | - Céline Vetter
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, USA
| | - Bettina Tassino
- Sección Etología, Facultad de Ciencias, Universidad de la República, Uruguay
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Mahajnah M, Sharkia R, Shorbaji N, Zelnik N. The Clinical Characteristics of ADHD Diagnosed in Adolescents in Comparison With Younger Children. J Atten Disord 2020; 24:1125-1131. [PMID: 28367712 DOI: 10.1177/1087054717696768] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objective: The aim of this study is to identify the clinical characteristics in adolescents newly diagnosed with ADHD. Method: Data of patients aged 7 to 17 years diagnosed with ADHD were collected and analyzed. The patients were divided into adolescents aged 13 to 17 years (Group I) and children aged 7 to 12 years (Group II): 592 males and 231 females. Group I consists of 450 participants, and Group II consists of 373 participants. Results: Adolescents were predominantly inattentive (63.8%); most of Group II patients had combined or hyperactive ADHD (70.8%). Learning disorders were more common in adolescents (51.2% vs. 39.7%) and treated mainly with long-acting methylphenidate (MPH), and Group II patients were treated mainly with short- and medium-acting MPH. Newly diagnosed adolescents were less likely to exhibit behavioral comorbidities. Headache and insomnia were reported more in adolescents, and stimulant rebound effect was more in younger children. Conclusion: Although the biological nature of ADHD is similar in both age groups, the primary symptomatology and associated comorbidities are prone to age-dependent changes.
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Affiliation(s)
- Muhammad Mahajnah
- Hillel Yaffe Medical Center, Hadera, Israel.,The Ruth and Bruce Rappaport Faculty of Medicine, Haifa, Israel
| | - Rajech Sharkia
- The Triangle Regional Research and Development Center, Kfar Qara, Israel.,Beit Berl Academic College, Israel
| | - Nadeem Shorbaji
- Hillel Yaffe Medical Center, Hadera, Israel.,The Ruth and Bruce Rappaport Faculty of Medicine, Haifa, Israel
| | - Nathanel Zelnik
- Hillel Yaffe Medical Center, Hadera, Israel.,The Ruth and Bruce Rappaport Faculty of Medicine, Haifa, Israel.,Haifa District and Carmel Medical Center, Israel
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Alfonsi V, Scarpelli S, D’Atri A, Stella G, De Gennaro L. Later School Start Time: The Impact of Sleep on Academic Performance and Health in the Adolescent Population. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17072574. [PMID: 32283688 PMCID: PMC7177233 DOI: 10.3390/ijerph17072574] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 02/05/2023]
Abstract
The crucial role of sleep in physical and mental health is well known, especially during the developmental period. In recent years, there has been a growing interest in examining the relationship between sleep patterns and school performance in adolescents. At this stage of life, several environmental and biological factors may affect both circadian and homeostatic regulation of sleep. A large part of this population does not experience adequate sleep, leading to chronic sleep restriction and/or disrupted sleep–wake cycles. Studies investigating the effects of different sleep–wake schedules on academic achievement showed that impaired sleep quality and quantity are associated with decreased learning ability and compromised daytime functioning. This review focuses on the most recent studies that evaluated the effects of modified school start time on sleep patterns and related outcomes. Moreover, based on the available empirical evidence, we intend to propose a direction for future studies targeted to implement prevention or treatment programs by modifying sleep timing.
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Affiliation(s)
- Valentina Alfonsi
- Department of Psychology, University of Rome Sapienza, 00185 Rome, Italy; (V.A.); (A.D.)
- IRCCS Fondazione Santa Lucia, 00179 Rome, Italy;
| | | | - Aurora D’Atri
- Department of Psychology, University of Rome Sapienza, 00185 Rome, Italy; (V.A.); (A.D.)
| | - Giacomo Stella
- Department of Education and Human Sciences, University of Modena and Reggio Emilia, 42121 Reggio Emilia, Italy;
| | - Luigi De Gennaro
- Department of Psychology, University of Rome Sapienza, 00185 Rome, Italy; (V.A.); (A.D.)
- IRCCS Fondazione Santa Lucia, 00179 Rome, Italy;
- Correspondence: ; Tel.: +39-06-49917647
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Exposure to electronic devices and sleep quality in adolescents: a matter of type, duration, and timing. Sleep Health 2020; 6:172-178. [DOI: 10.1016/j.sleh.2019.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 12/01/2019] [Accepted: 12/04/2019] [Indexed: 12/21/2022]
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Koscec Bjelajac A, Bakotic M, Ross B. Weekly alternation of morning and afternoon school start times: implications for sleep and daytime functioning of adolescents. Sleep 2020; 43:5741002. [DOI: 10.1093/sleep/zsaa030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 01/23/2020] [Indexed: 12/11/2022] Open
Abstract
Abstract
Study objectives
To examine sleep patterns of adolescents attending school on alternating morning schedule (MS) and afternoon schedule (AS) and to explore the contribution of sleep characteristics on the AS to prediction of adolescents’ daytime functioning.
Methods
The Croatian adaptation of the School Sleep Habits Survey for a two-shift school system was completed by 2,033 students (11–18 years old, 54 per cent females) whose school start times alternated weekly between 08:00 am and 14:00 pm.
Results
All age groups of adolescents reported delayed sleep when on the school week with an AS as compared with a MS. The average delay of bedtime was 36 minutes, and delay of wake-up time 121 minutes, which resulted in average sleep durations from 9.80 hours in 11-year olds to 8.39 hours in 18-year olds. Having more delayed wake-up times on the AS predicted more substance use and poorer grades. Having more delayed bedtimes not only predicted poorer grades but also predicted less depressed mood. Obtaining relatively longer sleep on AS predicted lower sleepiness, less depressed mood, and less frequent substance use.
Conclusions
The afternoon school start time enables sleep duration that is in line with adolescent sleep biology and contributes positively to daytime functioning. In many cases, a large delay in wake-up time is observed. At least part of that delay is not associated with adolescents’ circadian biology and contributes negatively to some indices of their daytime functioning. Further research of factors associated with extreme delays of sleep and/or interventions that could limit extreme sleep irregularity is required.
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Affiliation(s)
- Adrijana Koscec Bjelajac
- Occupational Health and Environmental Medicine Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Marija Bakotic
- Occupational Health and Environmental Medicine Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Biserka Ross
- Occupational Health and Environmental Medicine Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia
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40
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Interplay of chronotype and school timing predicts school performance. Nat Hum Behav 2020; 4:387-396. [PMID: 32042108 DOI: 10.1038/s41562-020-0820-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 01/05/2020] [Indexed: 12/21/2022]
Abstract
Most adolescents exhibit very late chronotypes and attend school early in the morning, a misalignment that can affect their health and psychological well-being. Here we examine how the interaction between the chronotype and school timing of an individual influences academic performance, studying a unique sample of 753 Argentinian students who were randomly assigned to start school in the morning (07:45), afternoon (12:40) or evening (17:20). Although chronotypes tend to align partially with class time, this effect is insufficient to fully account for the differences with school start time. We show that (1) for morning-attending students, early chronotypes perform better than late chronotypes in all school subjects, an effect that is largest for maths; (2) this effect vanishes for students who attend school in the afternoon; and (3) late chronotypes benefit from evening classes. Together, these results demonstrate that academic performance is improved when school times are better aligned with the biological rhythms of adolescents.
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Putilov AA, Poluektov MG, Dorokhov VB. Evening chronotype, late weekend sleep times and social jetlag as possible causes of sleep curtailment after maintaining perennial DST: ain’t they as black as they are painted? Chronobiol Int 2019; 37:82-100. [DOI: 10.1080/07420528.2019.1684937] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Arcady A. Putilov
- Laboratory of Sleep/Wake Neurobiology, the Institute of Higher Nervous Activity and Neurophysiology of the Russian Academy of Sciences, Moscow, Russia
| | - Mikhail G. Poluektov
- Department of Nervous Diseases and Neurosurgery, Institute of Clinical Medicine, I.M. Sechenov First Moscow Medical University (Sechenov University)
| | - Vladimir B. Dorokhov
- Laboratory of Sleep/Wake Neurobiology, the Institute of Higher Nervous Activity and Neurophysiology of the Russian Academy of Sciences, Moscow, Russia
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Manyanga T, Barnes JD, Chaput JP, Guerrero M, Katzmarzyk PT, Mire EF, Prista A, Tremblay MS. Body mass index and movement behaviors among schoolchildren from 13 countries across a continuum of human development indices: A multinational cross-sectional study. Am J Hum Biol 2019; 32:e23341. [PMID: 31648413 DOI: 10.1002/ajhb.23341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 09/06/2019] [Accepted: 09/15/2019] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVE This study describes the distributions of body mass index (BMI) and movement behaviors among schoolchildren from 13 countries across a continuum of human development. METHODS Data were from a cross-sectional study of 9-11-year-old children (n = 8055) recruited from 269 urban schools in 13 countries, and an additional 7 rural schools in one of these countries (Mozambique). BMI was derived from objectively measured heights and weights. Moderate- to vigorous-intensity physical activity (MVPA), sedentary time (SED), and sleep duration were assessed by waist-worn Actigraph GT3X+ accelerometers. Linear models were used to describe the distributions of BMI z-scores, MVPA, SED, and sleep among sites across varying Human Development Indices (HDIs). RESULTS Mean MVPA, SED, and sleep duration were 63.1 ± 27.3 minutes/day, 508.7 ± 72.4 minutes/day, and 8.8 ± 0.9 hours/night, respectively. Overall, 2.1% of the sample were thin, 19.5% overweight, and 11.7% were obese. Density curves (BMI z-scores and SED) for urban children in Mozambique showed significantly higher mean values compared with rural children. Boys had significantly higher mean MVPA compared with girls. Mean BMI z-scores were positively associated (β = .02; P = .004) with HDI, mean daily MVPA minutes were negatively associated (β = -.38; P = .025) with HDI, and mean SED time was positively associated with HDI (β = 1.18; P = .049). No significant association (β = .01; P = .29) was observed between sleep duration and HDI. CONCLUSION Our findings show distinct differences in BMI and movement behavior profiles between urban and rural children in Mozambique. Mean BMI z-scores, MVPA, and SED differed by country HDI. These findings support the need to include both rural and urban participants in study samples.
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Affiliation(s)
- Taru Manyanga
- Healthy Active Living and Obesity Research Group, CHEO Research Institute, Ottawa, Ontario, Canada.,School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Joel D Barnes
- Healthy Active Living and Obesity Research Group, CHEO Research Institute, Ottawa, Ontario, Canada
| | - Jean-Philippe Chaput
- Healthy Active Living and Obesity Research Group, CHEO Research Institute, Ottawa, Ontario, Canada.,School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Michelle Guerrero
- Healthy Active Living and Obesity Research Group, CHEO Research Institute, Ottawa, Ontario, Canada
| | | | - Emily F Mire
- Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Antonio Prista
- Research Group for Physical Activity and Health (CIDAF-FEFD), Universidade Pedagógica, Maputo, Mozambique
| | - Mark S Tremblay
- Healthy Active Living and Obesity Research Group, CHEO Research Institute, Ottawa, Ontario, Canada.,School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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Sun W, Ling J, Zhu X, Lee TMC, Li SX. Associations of weekday-to-weekend sleep differences with academic performance and health-related outcomes in school-age children and youths. Sleep Med Rev 2019; 46:27-53. [DOI: 10.1016/j.smrv.2019.04.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 03/22/2019] [Accepted: 04/02/2019] [Indexed: 12/26/2022]
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Randler C, Vollmer C, Kalb N, Itzek-Greulich H. Breakpoints of time in bed, midpoint of sleep, and social jetlag from infancy to early adulthood. Sleep Med 2019; 57:80-86. [DOI: 10.1016/j.sleep.2019.01.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 01/07/2019] [Accepted: 01/10/2019] [Indexed: 12/21/2022]
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Putilov AA, Verevkin EG. Simulation of the Ontogeny of Social Jet Lag: A Shift in Just One of the Parameters of a Model of Sleep-Wake Regulating Process Accounts for the Delay of Sleep Phase Across Adolescence. Front Physiol 2018; 9:1529. [PMID: 30455646 PMCID: PMC6230565 DOI: 10.3389/fphys.2018.01529] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Accepted: 10/11/2018] [Indexed: 12/22/2022] Open
Abstract
The term “social jet lag” was introduced for defining the conflict between social and biological clocks due to the general practice of shifting weekday risetime on early morning hours. The phase delay of the sleep-wake cycle during adolescence is one of the most remarkable features of the ontogenesis of sleep that is incompatible with early school start times. It was previously proposed that the process of accumulation of sleep pressure during wakefulness is slowing down in post-pubertal teens to allow them to stay awake for a longer period of time thus causing the delay of their bedtime. In order to examine this proposition, we traced the ontogeny of social jet lag using sleep times reported for 160 samples of study participants of different ages as an input to a model of sleep-wake regulatory process. The simulations suggested that a gradual change in just one of the model’s parameters, the time constant of wakefulness phase of the sleep-wake regulatory process, might explain the association of the transition between childhood and adulthood with the prolongation of time staying awake, delay of sleep time, and reduction of sleep duration. We concluded that the implication of the sleep-wake regulating model would be of help for understanding precisely how social jet lag varies with age and what are the chronophysiological causes of this variation.
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Affiliation(s)
- Arcady A Putilov
- Research Group for Math-Modeling of Biomedical Systems, Research Institute for Molecular Biology and Biophysics, Novosibirsk, Russia.,Laboratory of Sleep/Wake Neurobiology, Institute of Higher Nervous Activity and Neurophysiology of the Russian Academy of Sciences, Moscow, Russia
| | - Evgeniy G Verevkin
- Research Group for Math-Modeling of Biomedical Systems, Research Institute for Molecular Biology and Biophysics, Novosibirsk, Russia
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Pande B, Parveen N, Parganiha A, Pati AK. Shortening of sleep length and delayed mid-sleep on free days are the characteristic features of predominantly morning active population of Indian teenagers. Sleep Biol Rhythms 2018. [DOI: 10.1007/s41105-018-0173-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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47
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Barraco GM, Martínez-Lozano N, Vales-Villamarín C, Del Carmen Blaya M, Rios R, Madrid JA, Fardy P, Garaulet M. Circadian health differs between boys and girls as assessed by non-invasive tools in school-aged children. Clin Nutr 2018; 38:774-781. [PMID: 29609867 DOI: 10.1016/j.clnu.2018.03.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 02/19/2018] [Accepted: 03/05/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND & AIMS Assessment of circadian health is confined to adults. However, understanding circadian status of school-aged children is necessary due to its health implications. The aim was to develop 1) a protocol to assess circadian function in school-aged children by combining the best non-invasive tools previously validated in adults; 2) a score to capture circadian function in children including food timing. This protocol will allow to explore gender differences and to compare the circadian function of school-aged children with adults from the same Mediterranean area. METHODS Healthy children (8-12 y) from 3 schools in a Mediterranean area of Spain were recruited (n = 248; 125 males and 123 females). Several non-invasive tools were used: a) 7-day-diaries of food timing and food intake, physical-activity and sleep, b) Munich-chronotype-self-reported-questionnaire; c) cortisol and melatonin saliva determinations; d) 7-day-rhythms of wrist temperature (T), activity (A), position (P) and the integrative variable TAP e) 7-day-light exposure. RESULTS We have constructed the first school-aged children population for the assessment of circadian function (ONTIME-Jr) and a new circadian score has been developed. Among circadian-related measures, TAP was the most suitable and reliable to determine circadian system characteristics. Circadian function was better in girls than in boys [circadian score (AU) Mean ± SD (girls, 1216 ± 153 vs. 1159 ± 173 boys, P = 0.012)], and also in school-aged children than in adults from the same Mediterranean area (Circadian-Function-Index: children 0.47 ± 0.06 vs. adults 0.45 ± 0.06 P = 0.001). CONCLUSIONS A new protocol, including TAP and food timing, demonstrated to be reliable in assessing circadian function in children. These non-invasive techniques provide the wherewithal for paediatricians to assess circadian function in clinical practice. TRIAL REGISTRATION Chronobiology and childhood obesity (ONTIME-Jr: Obesity, Nutrigenetics, Timing and Mediterranean, Junior). ClinicalTrials.gov ID: NCT02895282, October 2014.
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Affiliation(s)
| | | | | | | | | | - Juan Antonio Madrid
- Department of Physiology, University of Murcia, IMIB-Arrixaca, Murcia, Spain.
| | - Paul Fardy
- Department of Physiology, University of Murcia, IMIB-Arrixaca, Murcia, Spain.
| | - Marta Garaulet
- Department of Physiology, University of Murcia, IMIB-Arrixaca, Murcia, Spain.
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Traub M, Lauer R, Kesztyüs T, Wartha O, Steinacker JM, Kesztyüs D. Skipping breakfast, overconsumption of soft drinks and screen media: longitudinal analysis of the combined influence on weight development in primary schoolchildren. BMC Public Health 2018; 18:363. [PMID: 29548323 PMCID: PMC5857087 DOI: 10.1186/s12889-018-5262-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 03/06/2018] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Regular breakfast and well-balanced soft drink, and screen media consumption are associated with a lower risk of overweight and obesity in schoolchildren. The aim of this research is the combined examination of these three parameters as influencing factors for longitudinal weight development in schoolchildren in order to adapt targeted preventive measures. METHODS In the course of the Baden-Württemberg Study, Germany, data from direct measurements (baseline (2010) and follow-up (2011)) at schools was available for 1733 primary schoolchildren aged 7.08 ± 0.6 years (50.8% boys). Anthropometric measurements of the children were taken according to ISAK-standards (International Standard for Anthropometric Assessment) by trained staff. Health and lifestyle characteristics of the children and their parents were assessed in questionnaires. A linear mixed effects regression analysis was conducted to examine influences on changes in waist-to-height-ratio (WHtR), weight, and body mass index (BMI) measures. A generalised linear mixed effects regression analysis was performed to identify the relationship between breakfast, soft drink and screen media consumption with the prevalence of overweight, obesity and abdominal obesity at follow-up. RESULTS According to the regression analyses, skipping breakfast led to increased changes in WHtR, weight and BMI measures. Skipping breakfast and the overconsumption of screen media at baseline led to higher odds of abdominal obesity and overweight at follow-up. No significant association between soft drink consumption and weight development was found. CONCLUSION Targeted prevention for healthy weight status and development in primary schoolchildren should aim towards promoting balanced breakfast habits and a reduction in screen media consumption. Future research on soft drink consumption is needed. Health promoting interventions should synergistically involve children, parents, and schools. TRIAL REGISTRATION The Baden-Württemberg Study is registered at the German Clinical Trials Register (DRKS) under the DRKS-ID: DRKS00000494 .
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Affiliation(s)
- Meike Traub
- Medical Center, Division of Sports and Rehabilitation Medicine, University of Ulm, Frauensteige 6, Haus 58/33, 89075 Ulm, Germany
| | - Romy Lauer
- Medical Center, Division of Sports and Rehabilitation Medicine, University of Ulm, Frauensteige 6, Haus 58/33, 89075 Ulm, Germany
| | - Tibor Kesztyüs
- Department of Computer Science, Ulm University of Applied Sciences, 89081 Ulm, Germany
- Institute of Medical Systems Biology, Ulm University, 89081 Ulm, Germany
| | - Olivia Wartha
- Medical Center, Division of Sports and Rehabilitation Medicine, University of Ulm, Frauensteige 6, Haus 58/33, 89075 Ulm, Germany
| | - Jürgen Michael Steinacker
- Medical Center, Division of Sports and Rehabilitation Medicine, University of Ulm, Frauensteige 6, Haus 58/33, 89075 Ulm, Germany
| | - Dorothea Kesztyüs
- Medical Center, Division of Sports and Rehabilitation Medicine, University of Ulm, Frauensteige 6, Haus 58/33, 89075 Ulm, Germany
- Institute of General Medicine, Ulm University, 89081 Ulm, Germany
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Arrona-Palacios A. High and low use of electronic media during nighttime before going to sleep: A comparative study between adolescents attending a morning or afternoon school shift. J Adolesc 2017; 61:152-163. [PMID: 29111446 DOI: 10.1016/j.adolescence.2017.10.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 10/14/2017] [Accepted: 10/22/2017] [Indexed: 12/12/2022]
Abstract
This study compared the effects of time spent on electronic media devices during nighttime before going to sleep on the sleep-wake cycle, daytime sleepiness, and chronotype in 568 Mexican students (288 girls, mean age = 14.08) attending a double school shift system (287 from morning shift and 281 from afternoon shift). Students completed anonymous self-report questionnaires. Results suggest that high exposure to an electronic media device may have an impact on their sleep-wake cycle, regardless of their school shift. Adolescents from the afternoon shift reported more time spent on devices. Those from the morning shift reported daytime sleepiness with the use of MP3 player, and from the afternoon shift with the use of computer, MP3 player, and television. Both school shifts reported an intermediate chronotype with all electronic media devices, but the afternoon shift with a tendency towards eveningness with the use of the computer, smartphone, and MP3 player.
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Affiliation(s)
- Arturo Arrona-Palacios
- Laboratory of Psychophysiology, Faculty of Psychology, Universidad Autónoma de Nuevo León, Mexico.
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Arrona-Palacios A, Díaz-Morales JF. Morningness-eveningness is not associated with academic performance in the afternoon school shift: Preliminary findings. BRITISH JOURNAL OF EDUCATIONAL PSYCHOLOGY 2017; 88:480-498. [DOI: 10.1111/bjep.12196] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 10/05/2017] [Indexed: 12/20/2022]
Affiliation(s)
- Arturo Arrona-Palacios
- Department of Criminology; UAMR-A; Autonomous University of Tamaulipas; Reynosa Tamaulipas Mexico
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