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Matricciani L, Paquet C, Fraysse F, Wake M, Olds T. Corrigendum to "Sleep profiles of Australian children aged 11-12 years and their parents: sociodemographic characteristics and lifestyle correlates" [Sleep Med 73 (2020) 53-62]. Sleep Med 2021; 86:161-164. [PMID: 34420868 DOI: 10.1016/j.sleep.2021.07.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- L Matricciani
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, Australia.
| | - C Paquet
- Australian Centre for Precision Health, University of South Australia, Adelaide, SA, Australia
| | - F Fraysse
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, Australia
| | - M Wake
- The University of Melbourne, Parkville, VIC, Australia; The University of Auckland, Grafton, Auckland, New Zealand
| | - T Olds
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, Australia
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Dumuid D, Martín-Fernández JA, Ellul S, Kenett RS, Wake M, Simm P, Baur L, Olds T. Analysing body composition as compositional data: An exploration of the relationship between body composition, body mass and bone strength. Stat Methods Med Res 2020; 30:331-346. [PMID: 32940148 DOI: 10.1177/0962280220955221] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Human body composition is made up of mutually exclusive and exhaustive parts (e.g. %truncal fat, %non-truncal fat and %fat-free mass) which are constrained to sum to the same total (100%). In statistical analyses, individual parts of body composition (e.g. %truncal fat or %fat-free mass) have traditionally been used as proxies for body composition, and have been linked with a range of health outcomes. But analysis of individual parts omits information about the other parts, which are intrinsically co-dependent because of the constant sum constraint of 100%. Further, body mass may be associated with health outcomes. We describe a statistical approach for body composition based on compositional data analysis. The body composition data are expressed as logratios to allow relative information about all the compositional parts to be explored simultaneously in relation to health outcomes. We describe a recent extension to the logratio approach to compositional data analysis which allows absolute information about the total of the compositional parts (body mass) to be considered alongside relative information about body composition. The statistical approach is illustrated by an example that explores the relationships between adults' body composition, body mass and bone strength.
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Affiliation(s)
- D Dumuid
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, SA, Australia
| | - J A Martín-Fernández
- Department of Computer Science, Applied Mathematics and Statistics, University of Girona, Girona, Spain
| | - S Ellul
- Murdoch Children's Research Institute, Murdoch Children's Research Institute, Parkville, VIC, Australia
| | - R S Kenett
- KPA Group, Raanana, Israel.,Samuel Neaman Institute for National Policy Research, Technion, Haifa, Israel
| | - M Wake
- Murdoch Children's Research Institute, Murdoch Children's Research Institute, Parkville, VIC, Australia.,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - P Simm
- Murdoch Children's Research Institute, Murdoch Children's Research Institute, Parkville, VIC, Australia.,Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia.,Department of Endocrinology and Diabetes, Royal Children's Hospital, Parkville, VIC, Australia
| | - L Baur
- Discipline of Child and Adolescent Health, University of Sydney, NSW, Australia
| | - T Olds
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, SA, Australia
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Curtis R, Maher C, Plotnikoff R, Vandelanotte C, Olds T, Ryan J, Edney S. Social cognitive theory predicts self-reported but not objectively measured physical activity in inactive Australian adults. J Sci Med Sport 2018. [DOI: 10.1016/j.jsams.2018.09.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Edney S, Ryan J, Olds T, Vandelanotte C, Plotnikoff R, Curtis R, Maher C. Do birds of a feather flock together within a team-based physical activity intervention? A social network analysis. J Sci Med Sport 2018. [DOI: 10.1016/j.jsams.2018.09.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ryan J, Lopian L, Le B, Edney S, Van Kessel G, Vandelanotte C, Plotnikoff R, Olds T, Maher C. Effective message framing to increase male participation in physical activity research: How can we maximise the potential of online social networks? J Sci Med Sport 2018. [DOI: 10.1016/j.jsams.2018.09.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Chaput JP, Barnes JD, Tremblay MS, Fogelholm M, Hu G, Lambert EV, Maher C, Maia J, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, Katzmarzyk PT. Thresholds of physical activity associated with obesity by level of sedentary behaviour in children. Pediatr Obes 2018; 13:450-457. [PMID: 29573239 DOI: 10.1111/ijpo.12276] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/27/2018] [Indexed: 12/27/2022]
Abstract
BACKGROUND It is unknown whether moderate-to-vigorous physical activity (MVPA) thresholds for obesity should be adapted depending on level of sedentary behaviour in children. OBJECTIVE The objective of the study is to determine the MVPA thresholds that best discriminate between obese and non-obese children, by level of screen time and total sedentary time in 12 countries. METHODS This multinational, cross-sectional study included 6522 children 9-11 years of age. MVPA and sedentary time were assessed using waist-worn accelerometry, while screen time was self-reported. Obesity was defined according to the World Health Organization reference data. RESULTS Receiver operating characteristic curve analyses showed that the best thresholds of MVPA to predict obesity ranged from 53.8 to 73.9 min d-1 in boys and from 41.7 to 58.7 min d-1 in girls, depending on the level of screen time. The MVPA cut-offs to predict obesity ranged from 37.9 to 75.9 min d-1 in boys and from 32.5 to 62.7 min d-1 in girls, depending on the level of sedentary behaviour. The areas under the curve ranged from 0.57 to 0.73 ('fail' to 'fair' accuracy), and most sensitivity and specificity values were below 85%, similar to MVPA alone. Country-specific analyses provided similar findings. CONCLUSIONS The addition of sedentary behaviour levels to MVPA did not result in a better predictive ability to classify children as obese/non-obese compared with MVPA alone.
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Affiliation(s)
- J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada.,University of Ottawa, Ottawa, Canada
| | - J D Barnes
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada.,University of Ottawa, Ottawa, Canada
| | | | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - E V Lambert
- University of Cape Town, Cape Town, South Africa
| | - C Maher
- University of South Australia, Adelaide, Australia
| | - J Maia
- University of Porto, Porto, Portugal
| | - T Olds
- University of South Australia, Adelaide, Australia
| | | | | | | | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA.,University of Massachusetts Amherst, Amherst, MA, USA
| | - P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
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Chaput J, Barnes JD, Tremblay MS, Fogelholm M, Hu G, Lambert EV, Maher C, Maia J, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor‐Locke C, Katzmarzyk PT. Inequality in physical activity, sedentary behaviour, sleep duration and risk of obesity in children: a 12-country study. Obes Sci Pract 2018; 4:229-237. [PMID: 29951213 PMCID: PMC6009998 DOI: 10.1002/osp4.271] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/28/2018] [Accepted: 04/04/2018] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE Studies examining associations between movement behaviours (i.e. physical activity, sedentary behaviour and sleep duration) and obesity focus on average values of these movement behaviours, despite important within-country and between-country variability. A better understanding of movement behaviour inequalities is important for developing public health policies and behaviour-change interventions. The objective of this ecologic analysis at the country level was to determine if inequality in movement behaviours is a better correlate of obesity than average movement behaviour volume in children from all inhabited continents of the world. METHODS This multinational, cross-sectional study included 6,128 children 9-11 years of age. Moderate-to-vigorous physical activity (MVPA), total sedentary time (SED) and sleep period time were monitored over 7 consecutive days using waist-worn accelerometry. Screen time was self-reported. Inequality in movement behaviours was determined using Gini coefficients (ranging from 0 [complete equality] to 1 [complete inequality]). RESULTS The largest inequality in movement behaviours was observed for screen time (Gini of 0.32; medium inequality), followed by MVPA (Gini of 0.21; low inequality), SED (Gini of 0.07; low inequality) and sleep period time (Gini of 0.05; low inequality). Average MVPA (h d-1) was a better correlate of obesity than MVPA inequality (r = -0.77 vs. r = 0.00, p = 0.03). Average SED (h d-1) was also a better correlate of obesity than SED inequality (r = 0.52 vs. r = -0.32, p = 0.05). Differences in associations for screen time and sleep period time were not statistically significant. MVPA in girls was found to be disproportionally lower in countries with more MVPA inequality. CONCLUSIONS Findings from this study show that average MVPA and SED should continue to be used in population health studies of children as they are better correlates of obesity than inequality in these behaviours. Moreover, the findings suggest that MVPA inequality could be greatly reduced through increases in girls' MVPA alone.
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Affiliation(s)
- J.‐P. Chaput
- Children's Hospital of Eastern Ontario Research InstituteOttawaCanada
- University of OttawaOttawaCanada
| | - J. D. Barnes
- Children's Hospital of Eastern Ontario Research InstituteOttawaCanada
| | - M. S. Tremblay
- Children's Hospital of Eastern Ontario Research InstituteOttawaCanada
- University of OttawaOttawaCanada
| | | | - G. Hu
- Pennington Biomedical Research CenterBaton RougeLouisianaUSA
| | | | - C. Maher
- University of South AustraliaAdelaideAustralia
| | - J. Maia
- University of PortoPortoPortugal
| | - T. Olds
- University of South AustraliaAdelaideAustralia
| | | | | | | | - C. Tudor‐Locke
- Pennington Biomedical Research CenterBaton RougeLouisianaUSA
- University of Massachusetts AmherstAmherstMassachusettsUSA
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Dumuid D, Olds T, Lewis LK, Martin-Fernández JA, Barreira T, Broyles S, Chaput JP, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maia J, Matsudo V, Onywera VO, Sarmiento OL, Standage M, Tremblay MS, Tudor-Locke C, Zhao P, Katzmarzyk P, Gillison F, Maher C. The adiposity of children is associated with their lifestyle behaviours: a cluster analysis of school-aged children from 12 nations. Pediatr Obes 2018; 13:111-119. [PMID: 28027427 DOI: 10.1111/ijpo.12196] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/09/2016] [Accepted: 09/30/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND The relationship between children's adiposity and lifestyle behaviour patterns is an area of growing interest. OBJECTIVES The objectives of this study are to identify clusters of children based on lifestyle behaviours and compare children's adiposity among clusters. METHODS Cross-sectional data from the International Study of Childhood Obesity, Lifestyle and the Environment were used. PARTICIPANTS the participants were children (9-11 years) from 12 nations (n = 5710). MEASURES 24-h accelerometry and self-reported diet and screen time were clustering input variables. Objectively measured adiposity indicators were waist-to-height ratio, percent body fat and body mass index z-scores. ANALYSIS sex-stratified analyses were performed on the global sample and repeated on a site-wise basis. Cluster analysis (using isometric log ratios for compositional data) was used to identify common lifestyle behaviour patterns. Site representation and adiposity were compared across clusters using linear models. RESULTS Four clusters emerged: (1) Junk Food Screenies, (2) Actives, (3) Sitters and (4) All-Rounders. Countries were represented differently among clusters. Chinese children were over-represented in Sitters and Colombian children in Actives. Adiposity varied across clusters, being highest in Sitters and lowest in Actives. CONCLUSIONS Children from different sites clustered into groups of similar lifestyle behaviours. Cluster membership was linked with differing adiposity. Findings support the implementation of activity interventions in all countries, targeting both physical activity and sedentary time.
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Affiliation(s)
- Dorothea Dumuid
- School of Health Sciences, University of South Australia, Adelaide, Australia
| | - T Olds
- School of Health Sciences, University of South Australia, Adelaide, Australia
| | - L K Lewis
- School of Health Sciences, University of South Australia, Adelaide, Australia.,School of Health Sciences, Flinders University, Adelaide, Australia
| | | | - T Barreira
- Population Science, Pennington Biomedical Research Center, Baton Rouge, USA.,School of Education, Syracuse University, Syracuse, USA
| | - S Broyles
- Population Science, Pennington Biomedical Research Center, Baton Rouge, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - G Hu
- Population Science, Pennington Biomedical Research Center, Baton Rouge, USA
| | - R Kuriyan
- Department of Nutrition, St John's Research Institute, Bengaluru, India
| | - A Kurpad
- Department of Nutrition, St John's Research Institute, Bengaluru, India
| | - E V Lambert
- Department of Human Biology, University of Cape Town, Cape Town, South Africa
| | - J Maia
- Faculty of Sport, University of Porto, Porto, Portugal
| | - V Matsudo
- Center of Studies of the Physical Fitness Research Laboratory from Sao Caetano du Sul (CELAFISCS), Sao Caetano do Sul, Brazil
| | - V O Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University, Kenyatta, Kenya
| | - O L Sarmiento
- Facultad de Medicina, Universidad de los Andes, Bogotá, Colombia
| | - M Standage
- Department for Health, University of Bath, Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | - C Tudor-Locke
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - P Katzmarzyk
- Population Science, Pennington Biomedical Research Center, Baton Rouge, USA
| | - F Gillison
- Department for Health, University of Bath, Bath, UK
| | - C Maher
- School of Health Sciences, University of South Australia, Adelaide, Australia
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Olds T, Sanders I, Maher C, Fraysse F, Bell L, Leslie E. Does compliance with healthy lifestyle behaviours cluster within individuals in Australian primary school-aged children? Child Care Health Dev 2018; 44:117-123. [PMID: 28736955 DOI: 10.1111/cch.12497] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 06/27/2017] [Accepted: 06/30/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND The 3 "movement behaviours" of sleep, screen time, and physical activity are associated with a wide range of health outcomes in children. This study examined whether these behaviours cluster together within individuals in Australian primary school children. METHODS Three datasets including 4,449 9- to 11-year-old children were interrogated-(a) Obesity Prevention and Lifestyle (OPAL), (b) the International Study of Children, Obesity, Lifestyle and Environment (ISCOLE), and (c) the National Children's Nutrition and Physical Activity Survey (NCNPAS). The surveys measured movement behaviours using different instruments (accelerometry, use of time recall, and questionnaires) and different operationalizations of compliance. Observed frequencies of compliance with various combinations of guidelines were compared with expected frequencies based on the assumption of independence, using chi-square tests. RESULTS Compliance with the sleep guidelines was relatively high (72%, 75%, and 79% in the OPAL, ISCOLE, and NCNPAS datasets, respectively), and compliance with the screen (18%, 35%, and 22%) and physical activity (33%, 57%, and 87%) guidelines was generally lower. Against expectation, there was no evidence of clustering in any of the datasets (p > .99). CONCLUSIONS Compliance with movement behaviour guidelines does not cluster within individuals in 9- to 11-year-old Australian children. It may be unlikely that fostering compliance with one guideline will have a flow-on effect to the others. Temporal trade-offs (i.e., the need to choose one movement behaviour above another) in the 24-hr day may contribute to the lack of clustering.
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Affiliation(s)
- T Olds
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, SA, Australia
| | - I Sanders
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, SA, Australia
| | - C Maher
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, SA, Australia
| | - F Fraysse
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, SA, Australia
| | - L Bell
- Nutrition and Dietetics, Faculty of Medicine, Nursing and Health Sciences, School of Health Sciences, Flinders University, Adelaide, SA, Australia
| | - E Leslie
- Nutrition and Dietetics, Faculty of Medicine, Nursing and Health Sciences, School of Health Sciences, Flinders University, Adelaide, SA, Australia
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Chaput JP, Katzmarzyk PT, Barnes JD, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, Zhao P, Tremblay MS. Mid-upper arm circumference as a screening tool for identifying children with obesity: a 12-country study. Pediatr Obes 2017; 12:439-445. [PMID: 27238202 DOI: 10.1111/ijpo.12162] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 04/21/2016] [Accepted: 05/09/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND No studies have examined if mid-upper arm circumference (MUAC) can be an alternative screening tool for obesity in an international sample of children differing widely in levels of human development. OBJECTIVE Our aim is to determine whether MUAC could be used to identify obesity in children from 12 countries in five major geographic regions of the world. METHODS This observational, multinational cross-sectional study included 7337 children aged 9-11 years. Anthropometric measurements were objectively assessed, and obesity was defined according to the World Health Organization reference data. RESULTS In the total sample, MUAC was strongly correlated with adiposity indicators in both boys and girls (r > 0.86, p < 0.001). The accuracy level of MUAC for identifying obesity was high in both sexes and across study sites (overall area under the curve of 0.97, sensitivity of 95% and specificity of 90%). The MUAC cut-off value to identify obesity was ~25 cm for both boys and girls. In country-specific analyses, the cut-off value to identify obesity ranged from 23.2 cm (boys in South Africa) to 26.2 cm (girls in the UK). CONCLUSIONS Results from this 12-country study suggest that MUAC is a simple and accurate measurement that may be used to identify obesity in children aged 9-11 years. MUAC may be a promising screening tool for obesity in resource-limited settings.
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Affiliation(s)
- J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | | | - J D Barnes
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, USA
| | - R Kuriyan
- St. Johns Research Institute, Bangalore, India
| | - A Kurpad
- St. Johns Research Institute, Bangalore, India
| | - E V Lambert
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes, Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath, Bath, UK
| | - C Tudor-Locke
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
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Katzmarzyk PT, Broyles ST, Chaput JP, Fogelholm M, Hu G, Lambert EV, Maher C, Maia J, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Tudor-Locke C. Sources of variability in childhood obesity indicators and related behaviors. Int J Obes (Lond) 2017; 42:108-110. [PMID: 28811652 PMCID: PMC5762390 DOI: 10.1038/ijo.2017.204] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 08/04/2017] [Indexed: 01/08/2023]
Abstract
The purpose of this study was to describe sources of variability in obesity-related variables in 6,022 children aged 9–11 y from 12 countries. The study design involved recruitment of students, nested within schools, which were nested within study sites. Height, weight and waist circumference (WC) were measured and BMI was calculated; sleep duration and total and in-school moderate-to-vigorous physical activity (MVPA) and sedentary time were measured by accelerometry; and diet scores were obtained by questionnaire. Variance in most variables was largely explained at the student level: BMI (91.9%), WC (93.5%), sleep (75.3%), MVPA (72.5%), sedentary time (76.9%), healthy diet score (88.3%), unhealthy diet score (66.2%), with the exception of in-school MVPA (53.8%) and in-school sedentary time (25.1%). Variance explained at the school level ranged from 3.3% for BMI to 29.8% for in-school MVPA, and variance explained at the site level ranged from 3.2% for WC to 54.2% for in-school sedentary time. In general, more variance was explained at the school and site levels for behaviors than for anthropometric traits. Given the variance in obesity-related behaviors in primary school children explained at school and site levels, interventions that target policy and environmental changes may enhance obesity intervention efforts.
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Affiliation(s)
- P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - S T Broyles
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | | | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - E V Lambert
- Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - C Maher
- School of Health Sciences/Sansom Institute, University of South Australia, Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - T Olds
- School of Health Sciences/Sansom Institute, University of South Australia, Adelaide, South Australia, Australia
| | | | | | | | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
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Sampasa-Kanyinga H, Standage M, Tremblay MS, Katzmarzyk PT, Hu G, Kuriyan R, Maher C, Maia J, Olds T, Sarmiento OL, Tudor-Locke C, Chaput JP. Associations between meeting combinations of 24-h movement guidelines and health-related quality of life in children from 12 countries. Public Health 2017; 153:16-24. [PMID: 28818582 DOI: 10.1016/j.puhe.2017.07.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 05/09/2017] [Accepted: 07/07/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To examine whether meeting vs not meeting movement/non-movement guidelines (moderate-to-vigorous physical activity [MVPA], screen time, sleep duration), and combinations of these recommendations, are associated with health-related quality of life (HRQoL) in children from 12 countries in five major geographic regions of the world and explore whether the associations vary by study site. STUDY DESIGN Observational, multinational cross-sectional study. METHODS This study included 6106 children aged 9-11 years from sites in Australia, Brazil, Canada, China, Colombia, Finland, India, Kenya, Portugal, South Africa, the United Kingdom, and the United States. Participants completed the KIDSCREEN-10 to provide a global measure of their HRQoL. Sleep duration and MVPA were assessed using 24-h accelerometry. Screen time was assessed through self-report. Meeting the recommendations was defined as ≥60 min/day for MVPA, ≤2 h/day for screen time, and between 9 and 11 h/night for sleep duration. Age, sex, highest parental education, unhealthy diet pattern score, and body mass index z-score were included as covariates in statistical models. RESULTS In the full sample, children meeting the screen time recommendation, the screen time + sleep recommendation, and all three recommendations had significantly better HRQoL than children not meeting any of these guidelines. Differences in HRQoL scores between sites were also found within combinations of movement/non-movement behaviors. For example, while children in Australia, Canada, and USA self-reported better HRQoL when meeting all three recommendations, children in Kenya and Portugal reported significantly lower HRQoL when meeting all three recommendations (relative to not meeting any). CONCLUSIONS Self-reported HRQoL is generally higher when children meet established movement/non-movement recommendations. However, differences between study sites also suggest that interventions aimed at improving lifestyle behaviors and HRQoL should be locally and culturally adapted.
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Affiliation(s)
- H Sampasa-Kanyinga
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, Canada
| | - M Standage
- Department for Health, University of Bath, Bath, United Kingdom
| | - M S Tremblay
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - R Kuriyan
- Department of Nutrition, St. John's Research Institute, Bangalore, India
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia
| | - O L Sarmiento
- School of Medicine, Universidad de Los Andes, Bogotá, Colombia
| | - C Tudor-Locke
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - J-P Chaput
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada.
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Bell L, Ullah S, Olds T, Magarey A, Leslie E, Jones M, Miller M, Cobiac L. Prevalence and socio-economic distribution of eating, physical activity and sedentary behaviour among South Australian children in urban and rural communities: baseline findings from the OPAL evaluation. Public Health 2016; 140:196-205. [DOI: 10.1016/j.puhe.2016.06.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 06/07/2016] [Accepted: 06/27/2016] [Indexed: 10/21/2022]
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Gomersall SR, Maher C, English C, Rowlands AV, Dollman J, Norton K, Olds T. Testing the activitystat hypothesis: a randomised controlled trial. BMC Public Health 2016; 16:900. [PMID: 27576515 PMCID: PMC5004298 DOI: 10.1186/s12889-016-3568-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Accepted: 08/20/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND It has been hypothesised that an 'activitystat' may biologically regulate energy expenditure or physical activity levels, thereby limiting the effectiveness of physical activity interventions. Using a randomised controlled trial design, the aim of this study was to investigate the effect of a six-week exercise stimulus on energy expenditure and physical activity, in order to empirically test this hypothesis. METHODS Previously inactive adults (n = 129) [age (mean ± SD) 41 ± 11 year; body mass index 26.1 ± 5.2 kg/m(2)] were randomly allocated to a Control group (n = 43) or a 6-week Moderate (150 min/week) (n = 43) or Extensive (300 min/week) (n = 43) exercise intervention group. Energy expenditure and physical activity were measured using a combination of accelerometry (total counts, minutes spent in moderate to vigorous physical activity) and detailed time use recalls using the Multimedia Activity Recall for Children and Adults (total daily energy expenditure, minutes spent in moderate to vigorous physical activity) at baseline, mid- and end-intervention and 3- and 6-month follow up. Resting metabolic rate was measured at baseline and end-intervention using indirect calorimetry. Analysis was conducted using random effects mixed modeling. RESULTS At end-intervention, there were statistically significant increases in all energy expenditure and physical activity variables according to both accelerometry and time use recalls (p < 0.001) in the Moderate and Extensive groups, relative to Controls. There was no significant change in resting metabolic rate (p = 0.78). CONCLUSION Taken together, these results show no evidence of an "activitystat" effect. In the current study, imposed exercise stimuli of 150-300 min/week resulted in commensurate increases in overall energy expenditure and physical activity, with no sign of compensation in either of these constructs. TRIAL REGISTRATION NUMBER ACTRN12610000248066 (registered prospectively 24 March 2010).
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Affiliation(s)
- S R Gomersall
- School of Health Sciences, Alliance for Research in Exercise, Nutrition and Activity, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia.
- School of Human Movement and Nutrition Sciences, Centre of Research on Exercise, Physical Activity and Health (CRExPAH), The University of Queensland, Brisbane, Australia.
| | - C Maher
- School of Health Sciences, Alliance for Research in Exercise, Nutrition and Activity, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia
| | - C English
- School of Health Sciences, Alliance for Research in Exercise, Nutrition and Activity, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia
| | - A V Rowlands
- School of Health Sciences, Alliance for Research in Exercise, Nutrition and Activity, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia
- Diabetes Research Centre, University of Leicester, Leicester General Hospital, Leicester, UK
- NIHR Leicester-Loughborough Diet, Lifestyle and Physical Activity Biomedical Research Unit, Leicester, UK
| | - J Dollman
- School of Health Sciences, Alliance for Research in Exercise, Nutrition and Activity, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia
| | - K Norton
- School of Health Sciences, Alliance for Research in Exercise, Nutrition and Activity, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia
| | - T Olds
- School of Health Sciences, Alliance for Research in Exercise, Nutrition and Activity, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia
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Lewis LK, Rowlands AV, Gardiner PA, Standage M, English C, Olds T. Small Steps: Preliminary effectiveness and feasibility of an incremental goal-setting intervention to reduce sitting time in older adults. Maturitas 2016; 85:64-70. [PMID: 26857881 DOI: 10.1016/j.maturitas.2015.12.014] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 12/23/2015] [Accepted: 12/27/2015] [Indexed: 11/26/2022]
Abstract
OBJECTIVE This study aimed to evaluate the preliminary effectiveness and feasibility of a theory-informed program to reduce sitting time in older adults. DESIGN Pre-experimental (pre-post) study. Thirty non-working adult (≥ 60 years) participants attended a one hour face-to-face intervention session and were guided through: a review of their sitting time; normative feedback on sitting time; and setting goals to reduce total sitting time and bouts of prolonged sitting. Participants chose six goals and integrated one per week incrementally for six weeks. Participants received weekly phone calls. OUTCOME MEASURES Sitting time and bouts of prolonged sitting (≥ 30 min) were measured objectively for seven days (activPAL3c inclinometer) pre- and post-intervention. During these periods, a 24-h time recall instrument was administered by computer-assisted telephone interview. Participants completed a post-intervention project evaluation questionnaire. Paired t tests with sequential Bonferroni corrections and Cohen's d effect sizes were calculated for all outcomes. RESULTS Twenty-seven participants completed the assessments (71.7 ± 6.5 years). Post-intervention, objectively-measured total sitting time was significantly reduced by 51.5 min per day (p=0.006; d=-0.58) and number of bouts of prolonged sitting by 0.8 per day (p=0.002; d=-0.70). Objectively-measured standing increased by 39 min per day (p=0.006; d=0.58). Participants self-reported spending 96 min less per day sitting (p<0.001; d=-0.77) and 32 min less per day watching television (p=0.005; d=-0.59). Participants were highly satisfied with the program. CONCLUSION The 'Small Steps' program is a feasible and promising avenue for behavioral modification to reduce sitting time in older adults.
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Affiliation(s)
- L K Lewis
- School of Health Sciences, Faculty of Medicine, Nursing and Health Sciences, Flinders University, Adelaide, Australia; Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, University of South Australia, Adelaide, Australia.
| | - A V Rowlands
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, University of South Australia, Adelaide, Australia; Diabetes Research Centre, University of Leicester, Leicester Diabetes Centre, Leicester General Hospital, Leicester, Leicestershire LE5 4PW, United Kingdom; National Institute for Health Research (NIHR) Leicester-Loughborough Diet, Lifestyle and Physical Activity Biomedical Research Unit (BRU), Leicester Diabetes Centre, Leicester General Hospital, Leicester, Leicestershire LE5 4PW, United Kingdom.
| | - P A Gardiner
- The University of Queensland, School of Public Health, Brisbane, Australia; Mater Research Institute, The University of Queensland, Brisbane, Australia.
| | - M Standage
- Department for Health, University of Bath, Bath, United Kingdom.
| | - C English
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, University of South Australia, Adelaide, Australia.
| | - T Olds
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, University of South Australia, Adelaide, Australia.
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Katzmarzyk PT, Barreira TV, Broyles ST, Chaput JP, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Tudor-Locke C, Zhao P, Church TS. Association between body mass index and body fat in 9-11-year-old children from countries spanning a range of human development. Int J Obes Suppl 2015; 5:S43-6. [PMID: 27152184 DOI: 10.1038/ijosup.2015.18] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The purpose was to assess associations between body mass index (BMI) and body fat in a multinational sample of 9-11-year-old children. The sample included 7265 children from countries ranging in human development. Total body fat (TBF) and percentage body fat (PBF) were measured with a Tanita SC-240 scale and BMI z-scores (BMIz) and percentiles were computed using reference data from the World Health Organization and the U.S. Centers for Disease Control and Prevention, respectively. Mean PBF at BMIz values of -1, 0 and +1 were estimated using multilevel models. Correlations between BMI and TBF were >0.90 in all countries, and correlations between BMI and PBF ranged from 0.76 to 0.96. Boys from India had higher PBF than boys from several other countries at all levels of BMIz. Kenyan girls had lower levels of PBF than girls from several other countries at all levels of BMIz. Boys and girls from Colombia had higher values of PBF at BMIz=-1, whereas Colombian boys at BMIz 0 and +1 also had higher values of PBF than boys in other countries. Our results show a consistently high correlation between BMI and adiposity in children from countries representing a wide range of human development.
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Affiliation(s)
- P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, University of Syracuse, Syracuse, NY, USA
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute , Bangalore, India
| | - A Kurpad
- St Johns Research Institute , Bangalore, India
| | - E V Lambert
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul , Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes , Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath , Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
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17
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Chaput JP, Katzmarzyk PT, LeBlanc AG, Tremblay MS, Barreira TV, Broyles ST, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Rae DE, Maher C, Maia J, Matsudo V, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, Zhao P, Olds T. Associations between sleep patterns and lifestyle behaviors in children: an international comparison. Int J Obes Suppl 2015; 5:S59-65. [PMID: 27152187 DOI: 10.1038/ijosup.2015.21] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVES Although evidence is accumulating on the importance of a good night's sleep for healthy eating and activity behaviors, existing research has mainly been conducted in high-income, developed countries with limited sociocultural variability. This study is the first to examine the associations between sleep patterns and lifestyle behaviors in children from 12 countries in five major geographic regions of the world. METHODS This observational, multinational cross-sectional study included 5777 children aged 9-11 years from sites in Australia, Brazil, Canada, China, Colombia, Finland, India, Kenya, Portugal, South Africa, the United Kingdom and the United States. Nocturnal sleep duration (hours per night), sleep efficiency (%) and bedtime (h:min) were monitored over 7 consecutive days using an accelerometer. Lifestyle behaviors included moderate-to-vigorous physical activity (MVPA), total sedentary time (SED), self-reported screen time (ST) and healthy/unhealthy diet patterns (HDP/UDP). Multilevel modeling analyses were used to account for the hierarchical nature of the data. RESULTS Overall, participants averaged 8.8 (s.d. 0.9) hours of sleep with 96.2% (s.d. 1.4) sleep efficiency and a mean bedtime of 2218 hours. After adjustment for age, sex, highest parental education and BMI z-score, results showed that (i) sleep duration was negatively associated with MVPA, SED and UDP score; (ii) sleep efficiency was negatively associated with MVPA and UDP score, and positively associated with SED; and (iii) later bedtime was positively associated with SED, ST and UDP score, and negatively associated with MVPA and HDP score. Results using categories of sleep patterns were consistent with the linear associations. Results also revealed that associations between sleep patterns and MVPA, SED and ST were significantly different between study sites, with stronger associations in high-income countries compared with low/middle-income countries. CONCLUSIONS Sleep characteristics are important correlates of lifestyle behaviors in children. Differences between countries suggest that interventions aimed at improving sleep and lifestyle behaviors should be culturally adapted.
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Affiliation(s)
- J-P Chaput
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - A G LeBlanc
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; University of Ottawa, Ottawa, Ontario, Canada
| | - M S Tremblay
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, University of Syracuse, Syracuse, NY, USA
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St. Johns Research Institute , Bangalore, India
| | - A Kurpad
- St. Johns Research Institute , Bangalore, India
| | - E V Lambert
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - D E Rae
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS) , Sao Paulo, Brazil
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine Universidad de los Andes , Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath , Bath, UK
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
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18
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Tudor-Locke C, Mire EF, Barreira TV, Schuna JM, Chaput JP, Fogelholm M, Hu G, Kurpad A, Kuriyan R, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Zhao P, Church TS, Katzmarzyk PT. Nocturnal sleep-related variables from 24-h free-living waist-worn accelerometry: International Study of Childhood Obesity, Lifestyle and the Environment. Int J Obes Suppl 2015; 5:S47-52. [PMID: 27152185 DOI: 10.1038/ijosup.2015.19] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVES We describe the process of identifying and defining nocturnal sleep-related variables (for example, movement/non-movement indicators of sleep efficiency, waking episodes, midpoint and so on) using the unique 24-h waist-worn free-living accelerometer data collected in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE). METHODS Seven consecutive days of 24-h waist-worn accelerometer (GT3X+, ActiGraph LLC) data were collected from over 500 children at each site. An expert subgroup of the research team with accelerometry expertize, frontline data collectors and data managers met on several occasions to categorize and operationally define nocturnal accelerometer signal data patterns. The iterative process was informed by the raw data drawn from a sub set of the US data, and culminated in a refined and replicable delineated definition for each identified nocturnal sleep-related variable. Ultimately based on 6318 participants from all 12 ISCOLE sites with valid total sleep episode time (TSET), we report average clock times for nocturnal sleep onset, offset and midpoint in addition to sleep period time, TSET and restful sleep efficiency (among other derived variables). RESULTS Nocturnal sleep onset occurred at 2218 hours and nocturnal sleep offset at 0707 hours. The mean midpoint was 0243 hours. The sleep period time of 529.6 min (8.8 h) was typically accumulated in a single episode, making the average TSET very similar in duration (529.0 min). The mean restful sleep efficiency ranged from 86.8% (based on absolute non-movement of 0 counts per minute) to 96.0% (based on relative non-movement of <100 counts per minute). CONCLUSIONS These variables extend the potential of field-based 24-h waist-worn accelerometry to distinguish and categorize the underlying robust patterns of movement/non-movement signals conveying magnitude, duration, frequency and periodicity during the nocturnal sleep period.
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Affiliation(s)
- C Tudor-Locke
- Department of Kinesiology, School of Public Health and Health Sciences, University of Massachusetts Amherst, Amherst, MA, USA; Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - E F Mire
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, Syracuse University, Syracuse, NY, USA
| | - J M Schuna
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Oregon State University, Corvallis, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - A Kurpad
- St Johns Research Institute , Bangalore, India
| | - R Kuriyan
- St Johns Research Institute , Bangalore, India
| | - E V Lambert
- Department of Human Biology, Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS) , Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes , Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath , Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
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19
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Zakrzewski JK, Gillison FB, Cumming S, Church TS, Katzmarzyk PT, Broyles ST, Champagne CM, Chaput JP, Denstel KD, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Mire EF, Olds T, Onywera V, Sarmiento OL, Tremblay MS, Tudor-Locke C, Zhao P, Standage M. Associations between breakfast frequency and adiposity indicators in children from 12 countries. Int J Obes Suppl 2015; 5:S80-8. [PMID: 27152190 DOI: 10.1038/ijosup.2015.24] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Reports of inverse associations between breakfast frequency and indices of obesity are predominantly based on samples of children from high-income countries with limited socioeconomic diversity. Using data from the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE), the present study examined associations between breakfast frequency and adiposity in a sample of 9-11-year-old children from 12 countries representing a wide range of geographic and socio-cultural variability. METHODS Multilevel statistical models were used to examine associations between breakfast frequency (independent variable) and adiposity indicators (dependent variables: body mass index (BMI) z-score and body fat percentage (BF%)), adjusting for age, sex, and parental education in 6941 children from 12 ISCOLE study sites. Associations were also adjusted for moderate-to-vigorous physical activity, healthy and unhealthy dietary patterns and sleep time in a sub-sample (n=5710). Where interactions with site were significant, results were stratified by site. RESULTS Adjusted mean BMI z-score and BF% for frequent breakfast consumers were 0.45 and 20.5%, respectively. Frequent breakfast consumption was associated with lower BMI z-scores compared with occasional (P<0.0001, 95% confidence intervals (CI): 0.10-0.29) and rare (P<0.0001, 95% CI: 0.18-0.46) consumption, as well as lower BF% compared with occasional (P<0.0001, 95% CI: 0.86-1.99) and rare (P<0.0001, 95% CI: 1.07-2.76). Associations with BMI z-score varied by site (breakfast by site interaction; P=0.033): associations were non-significant in three sites (Australia, Finland and Kenya), and occasional (not rare) consumption was associated with higher BMI z-scores compared with frequent consumption in three sites (Canada, Portugal and South Africa). Sub-sample analyses adjusting for additional covariates showed similar associations between breakfast and adiposity indicators, but lacked site interactions. CONCLUSIONS In a multinational sample of children, more frequent breakfast consumption was associated with lower BMI z-scores and BF% compared with occasional and rare consumption. Associations were not consistent across all 12 countries. Further research is required to understand global differences in the observed associations.
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Affiliation(s)
- J K Zakrzewski
- Department of Sport Science and Physical Activity, University of Bedfordshire , Bedford, UK
| | - F B Gillison
- Department for Health, University of Bath , Bath, UK
| | - S Cumming
- Department for Health, University of Bath , Bath, UK
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - C M Champagne
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - K D Denstel
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute , Bangalore, India
| | - A Kurpad
- St Johns Research Institute , Bangalore, India
| | - E V Lambert
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research In Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS) , Sao Paulo, Brazil
| | - E F Mire
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - T Olds
- Alliance for Research In Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine Universidad de los Andes , Bogota, Colombia
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - M Standage
- Department for Health, University of Bath , Bath, UK
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Denstel KD, Broyles ST, Larouche R, Sarmiento OL, Barreira TV, Chaput JP, Church TS, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Standage M, Tremblay MS, Tudor-Locke C, Zhao P, Katzmarzyk PT. Active school transport and weekday physical activity in 9-11-year-old children from 12 countries. Int J Obes Suppl 2015; 5:S100-6. [PMID: 27152177 DOI: 10.1038/ijosup.2015.26] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES Active school transport (AST) may increase the time that children spend in physical activity (PA). This study examined relationships between AST and weekday moderate-to-vigorous physical activity (MVPA), light physical activity (LPA), sedentary time (SED) and total activity during naturally organized time periods (daily, before school, during school and after school) in a sample of children from 12 countries. METHODS The sample included 6224 children aged 9-11 years. PA and sedentary time were objectively measured using Actigraph accelerometers. AST was self-reported by participants. Multilevel generalized linear and logistic regression statistical models were used to determine associations between PA, SED and AST across and within study sites. RESULTS After adjustment for age, highest parental educational attainment, BMI z-score and accelerometer wear time, children who engaged in AST accumulated significantly more weekday MVPA during all studied time periods and significantly less time in LPA before school compared with children who used motorized transport to school. AST was unrelated to time spent in sedentary behaviors. Across all study sites, AST was associated with 6.0 min (95% confidence interval (CI): 4.7-7.3; P<0.0001) more of weekday MVPA; however, there was some evidence that this differed across study sites (P for interaction=0.06). Significant positive associations were identified within 7 of 12 study sites, with differences ranging from 4.6 min (95% CI: 0.3-8.9; P=0.04, in Canada) to 10.2 min (95% CI: 5.9-14.4; P<0.0001, in Brazil) more of daily MVPA among children who engaged in AST compared with motorized transport. CONCLUSIONS The present study demonstrated that AST was associated with children spending more time engaged in MVPA throughout the day and less time in LPA before school. AST represents a good behavioral target to increase levels of PA in children.
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Affiliation(s)
- K D Denstel
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Larouche
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes , Bogotá, Colombia
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, University of Syracuse, Syracuse, NY, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute , Bangalore, India
| | - A Kurpad
- St Johns Research Institute , Bangalore, India
| | - E V Lambert
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS) , São Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - M Standage
- Department for Health, University of Bath , Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
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Sarmiento OL, Lemoine P, Gonzalez SA, Broyles ST, Denstel KD, Larouche R, Onywera V, Barreira TV, Chaput JP, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Standage M, Tremblay MS, Tudor-Locke C, Zhao P, Church TS, Katzmarzyk PT. Relationships between active school transport and adiposity indicators in school-age children from low-, middle- and high-income countries. Int J Obes Supp 2015; 5:S107-14. [PMID: 27152178 DOI: 10.1038/ijosup.2015.27] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVES Within the global context of the nutrition and physical activity transition it is important to determine the relationship between adiposity and active school transport (AST) across different environmental and socio-cultural settings. The present study assessed the association between adiposity (that is, body mass index z-score (BMIz), obesity, percentage body fat (PBF), waist circumference) and AST in 12 country sites, in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE). METHODS The analytical sample included 6797 children aged 9-11 years. Adiposity indicators included, BMIz calculated using reference data from the World Health Organization, obesity (BMIz ⩾+2 s.d.), PBF measured using bioelectrical impedance and waist circumference. School travel mode was assessed by questionnaire and categorized as active travel versus motorized travel. Multilevel linear and non-linear models were used to estimate the magnitude of the associations between adiposity indicators and AST by country site and sex. RESULTS After adjusting for age, sex, parental education and motorized vehicle availability, children who reported AST were less likely to be obese (odds ratio=0.72, 95% confidence interval (0.60-0.87), P<0.001) and had a lower BMIz (-0.09, s.e.m.=0.04, P=0.013), PBF (least square means (LSM) 20.57 versus 21.23% difference -0.66, s.e.m.=0.22, P=0.002) and waist circumference (LSM 63.73 cm versus 64.63 cm difference -0.90, s.e.m.=0.26, P=0.001) compared with those who reported motorized travel. Overall, associations between obesity and AST did not differ by country (P=0.279) or by sex (P=0.571). CONCLUSIONS AST was associated with lower measures of adiposity in this multinational sample of children. Such findings could inform global efforts to prevent obesity among school-age children.
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Affiliation(s)
- O L Sarmiento
- Department of Public Health, School of Medicine, Universidad de los Andes , Bogotá, Colombia
| | - P Lemoine
- Department of Public Health, School of Medicine, Universidad de los Andes, Bogotá, Colombia; Department of Industrial Engineering, Faculty of Engineering, CeiBA Complex Systems Research Center, Universidad de los Andes, Bogotá, Colombia
| | - S A Gonzalez
- Department of Public Health, School of Medicine, Universidad de los Andes , Bogotá, Colombia
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - K D Denstel
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Larouche
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, University of Syracuse, Syracuse, NY, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St John's Research Institute , Bangalore, India
| | - A Kurpad
- St John's Research Institute , Bangalore, India
| | - E V Lambert
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research In Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul , Sao Paulo, Brazil
| | - T Olds
- Alliance for Research In Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - M Standage
- Department of Health, University of Bath , Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
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Qiao Y, Ma J, Wang Y, Li W, Katzmarzyk PT, Chaput JP, Fogelholm M, Johnson WD, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Tudor-Locke C, Church TS, Zhao P, Hu G. Birth weight and childhood obesity: a 12-country study. Int J Obes Suppl 2015; 5:S74-9. [PMID: 27152189 PMCID: PMC4850624 DOI: 10.1038/ijosup.2015.23] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Few studies have investigated the association between the full range of birth weight and the risk of childhood obesity in high-, middle- and low-income countries. The aim of the present study is to assess the association between different levels of birth weight and the risk of obesity among children aged 9-11 years in 12 countries. METHODS A multinational, cross-sectional study of 5141 children aged 9-11 years was conducted in 12 countries. Height and weight were obtained using standardized methods. Time spent in moderate-to-vigorous physical activity (MVPA), sedentary and sleeping were objectively measured using 24-h, waist-worn accelerometer (Actigraph GT3X+) monitored for 7 days. Birth weight and other factors (regions, parental education, maternal history of gestational diabetes, children age, gender, breast feeding, gestational age, unhealthy diet scores and healthy diet scores) were collected by parental and children's questionnaires. Multilevel modeling was used to account for the nested nature of the data. RESULTS The overall prevalence of obesity (BMI z-score>+2 s.d.) was 15.4% for boys and 10.0% for girls. There was a positive association between birth weight and BMI z-scores. The multivariable-adjusted odds ratios (ORs) of childhood obesity were significantly higher among children whose birth weights were 3500-3999 g (OR 1.45; 95% confidence interval (CI): 1.10-1.92), and >4000 g (OR 2.08; 95% CI: 1.47-2.93), compared with the reference group (2500-2999 g). The positive association between birth weight and the odds of childhood obesity was seen in girls, whereas a U-shaped association appeared in boys. CONCLUSIONS High levels of birth weight, defined as birth weight ⩾3500 g, were associated with increased odds of obesity among 9-11-year-old children in 12 countries. However, sex differences in the association between birth weight and the risk of obesity need to be considered when planning interventions to reduce childhood obesity.
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Affiliation(s)
- Y Qiao
- Tianjin Women's and Children's Health Center, Tianjin, China
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - J Ma
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - Y Wang
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - W Li
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - W D Johnson
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute, Bangalore, India
| | - A Kurpad
- St Johns Research Institute, Bangalore, India
| | - E V Lambert
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town, Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes, Bogota, Colombia
| | | | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - T S Church
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - for the ISCOLE Research Group
- Tianjin Women's and Children's Health Center, Tianjin, China
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
- St Johns Research Institute, Bangalore, India
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town, Cape Town, South Africa
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
- School of Medicine, Universidad de los Andes, Bogota, Colombia
- University of Bath, Bath, UK
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
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Maher C, Ferguson M, Vandelanotte C, Plotnikoff R, De Bourdeaudfuji I, Thomas S, Nelson-Field K, Olds T. An online social networking physical activity intervention delivered via Facebook: A randomised controlled trial. J Sci Med Sport 2015. [DOI: 10.1016/j.jsams.2015.12.404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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LeBlanc AG, Katzmarzyk PT, Barreira TV, Broyles ST, Chaput JP, Church TS, Fogelholm M, Harrington DM, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, Zhao P, Tremblay MS. Are participant characteristics from ISCOLE study sites comparable to the rest of their country? Int J Obes Suppl 2015; 5:S9-S16. [PMID: 27152192 PMCID: PMC4850614 DOI: 10.1038/ijosup.2015.13] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) provides robust, multi-national information on physical activity, diet and weight status in 9-11-year-old children around the world. The purpose of this analysis was to examine the similarities and differences between participant characteristics from ISCOLE sites and data from nationally representative surveys from ISCOLE countries (Australia, Brazil, Canada, China, Colombia, Finland, Kenya, India, Portugal, South Africa, the United Kingdom and the United States). METHODS Distributions of characteristics were assessed within each ISCOLE country-level database, and compared with published data from national or regional surveys, where available. Variables of comparison were identified a priori and included body mass index (BMI), physical activity (accelerometer-determined steps per day) and screen time (child-report). RESULTS Of 12 countries, data on weight status (BMI) were available in 8 countries, data on measured physical activity (steps per day) were available in 5 countries and data on self-reported screen time were available in 9 countries. The five ISCOLE countries that were part of the Health Behaviour in School-aged Children Survey (that is, Canada, Finland, Portugal, the United Kingdom (England) and the United States) also provided comparable data on self-reported physical activity. Available country-specific data often used different measurement tools or cut-points, making direct comparisons difficult. Where possible, ISCOLE data were re-analyzed to match country-level data, but this step limited between-country comparisons. CONCLUSIONS From the analyses performed, the ISCOLE data do not seem to be systematically biased; however, owing to limitations in data availability, data from ISCOLE should be used with appropriate caution when planning country-level population health interventions. This work highlights the need for harmonized measurement tools around the world while accounting for culturally specific characteristics, and the need for collaboration across study centers and research groups.
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Affiliation(s)
- A G LeBlanc
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- University of Ottawa, Ottawa, Ontario, Canada
| | - P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- University of Syracuse, Syracuse, New York, USA
| | - S T Broyles
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - J-P Chaput
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- University of Ottawa, Ottawa, Ontario, Canada
| | - T S Church
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | | | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute, Bangalore, India
| | - A Kurpad
- St Johns Research Institute, Bangalore, India
| | - E V Lambert
- Department of Human Biology, Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes, Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath, Bath, UK
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - M S Tremblay
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - for the ISCOLE Research Group
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- University of Ottawa, Ottawa, Ontario, Canada
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- University of Syracuse, Syracuse, New York, USA
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
- University of Leicester, Leicester, UK
- St Johns Research Institute, Bangalore, India
- Department of Human Biology, Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
- School of Medicine, Universidad de los Andes, Bogota, Colombia
- Department for Health, University of Bath, Bath, UK
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
- Tianjin Women's and Children's Health Center, Tianjin, China
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Straker L, Howie E, McVeigh J, Smith K, Fenner A, Olds T, Abbott R, Smith A. Changing the sedentary time and physical activity trajectories of obese adolescents: Results from the CAFAP controlled clinical trial. J Sci Med Sport 2014. [DOI: 10.1016/j.jsams.2014.11.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Schranz N, Olds T, Tomkinson G. Active Healthy Kids Australia 2014 Report Card on Physical Activity for Children and Young People “Is Sport Enough?”. J Sci Med Sport 2014. [DOI: 10.1016/j.jsams.2014.11.095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Stanley R, Pavey T, Maher C, Ridley K, Ferrar K, Olds T, Dollman J. Do children utilise critical windows in a school day for physical activity? A cluster analysis. J Sci Med Sport 2014. [DOI: 10.1016/j.jsams.2014.11.166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Eston R, Norton B, Olds T, Parfitt G. A ‘hard’ training program only works for some. J Sci Med Sport 2013. [DOI: 10.1016/j.jsams.2013.10.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
BACKGROUND No studies to date have examined the daily time spent across a variety of activity types (sleep, screen time, physical activity, domestic and school-related) in children with cerebral palsy (CP). AIM To investigate the activity patterns of adolescents with CP and contrast them with those of typically developing (TD) adolescents, using a use-of-time approach. METHODS Forty-one Australian adolescents with CP and 82 TD adolescents matched for age, sex, weight status and socio-economic status undertook structured interviews using a validated computerized use of time recall administered over 4 days. Time devoted to sleep, screen time, physical activity, domestic and school-related activity were compared using anova and Mann-Whitney tests. RESULTS Adolescents with CP spent less time in physical activity (91 vs. 147 min/day, P= 0.0003), and in particular, its sub-components of active transport (28 vs. 52 min/day, P= 0.0013) and team sports (25 vs. 39 min/day, P= 0.04). They experienced significantly more quiet time (116 vs. 80 min/day, P= 0.0025) but spent less time in social interaction (6 vs. 22 min/day, P= 0.0016). There were no significant differences in sleep, screen time, domestic activities or school-related time. CONCLUSIONS By and large, the activity patterns of ambulatory adolescents with CP were similar to their TD peers. Results highlight physical activity in younger adolescents (11-13 years) as an area for targeted interventions.
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Affiliation(s)
- C Maher
- Health and Use of Time (HUT) Group, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia.
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Tsiros MD, Buckley JD, Howe PRC, Olds T, Walkley J, Taylor L, Mallows R, Hills AP, Kagawa M, Coates AM. Day-to-day physical functioning and disability in obese 10- to 13-year-olds. Pediatr Obes 2013; 8:31-41. [PMID: 22962042 DOI: 10.1111/j.2047-6310.2012.00083.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 05/10/2012] [Accepted: 06/15/2012] [Indexed: 12/20/2022]
Abstract
UNLABELLED What is already known about this subject? Compared with their healthy-weight peers, children with obesity have; impaired physical health-related quality of life reduced physical activity levels reduced capacity to perform certain weight-bearing tasks in field-based fitness tests What this study adds? First investigation of obesity-related disability in children using the International Classification for Functioning, Disability and Health framework for Children and Youth. Obesity in children appears to be associated with disability impacting basic locomotor skills and physical health-related quality of life. Children's participation in key life areas related to physical functioning appears to be minimally impacted by obesity. OBJECTIVE The aim of this study was to investigate whether obesity is related to impaired day-to-day physical functioning and disability in children. METHODS An observational case-control study was conducted in three Australian states. Obese (n = 107) and healthy-weight (n = 132) 10- to 13-year-olds (132 male, 107 female) were recruited via media advertisements. Assessment of body composition (dual energy X-ray absorptiometry), locomotor capacity (six-minute walk test [6MWT], timed up and down stairs test [TUDS] and timed up and go [TUG]) and child-reported physical health-related quality of life (HRQoL) were undertaken. Participants wore an accelerometer for 8 days and completed two use-of-time telephone interviews to assess participation in key life areas. RESULTS Compared with their healthy-weight counterparts, obese children had lower physical HRQoL scores (P < 0.01) and reduced locomotor capacity (TUDS z-score, TUG and 6MWT; P < 0.01). Higher percent body fat was significantly related to lower physical HRQoL scores (r = -0.48, P < 0.01), slower performance times for the TUDS and TUG (r = 0.59 and 0.26 respectively, P < 0.01), shorter 6MWT distances (r = -0.51, P < 0.01) and reduced time spent in community participation activities (r = -0.23, P < 0.01). CONCLUSIONS As anticipated, obesity appears to undermine physical functioning in children, including the capacity to perform basic locomotor skills yet, unexpectedly, participation in key life areas related to physical functioning appeared largely unaffected.
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Affiliation(s)
- M D Tsiros
- Nutritional Physiology Research Centre, School of Health Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia
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Stanley R, Olds T, Ridley K, Dollman J. Increasing specificity to correlate research: Can we improve the prediction of children's context-specific physical activity? J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Katzmarzyk P, Church T, Chaput J, Hu G, Kurpad A, Lambert V, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento O, Standage M, Tremblay M, Tudor-Locke C, Zhao P. The international study of childhood obesity, lifestyle and the environment. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Schranz N, Olds T, Tomkinson G. Can resistance training change the strength, body composition and self-concept of overweight and obese adolescent males? A randomised controlled trial. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ferrar K, Olds T, Maher C, Maddison R. How similar are Australian and New Zealand youth? Trans-Tasman youth time use clusters and correlate profiles. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Foley L, Maddison R, Olds T, Ridley K. Self-report use-of-time tools for the assessment of physical activity and sedentary behaviour in young people: systematic review. Obes Rev 2012; 13:711-22. [PMID: 22429291 DOI: 10.1111/j.1467-789x.2012.00993.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
UNLABELLED Regular physical activity and limiting extended periods of sitting are two behaviours critical for the prevention of obesity in young people. The purpose of the systematic review was to synthesize the psychometric evidence for self-report use-of-time tools that assess these behaviours. Articles were retrieved that reported reliability and/or validity for use-of-time tools in participants aged 18 years or under. Outcome variables were physical activity, sedentary behaviour and energy expenditure. Study quality was appraised, and the results summarized narratively. Sixteen studies and six different tools were identified. The tools were the Previous Day Physical Activity Recall, the Three-Day Physical Activity Recall, the Physical Activity Interview, the Computerized Activity Recall, the Activitygram, and the Multimedia Activity Recall for Children and Adolescents. Overall, tools indicated moderate validity compared with objective and criterion comparison methods. Generally, validity correlation coefficients were in the range of 0.30-0.40. Correlation coefficients for test-retest reliability ranged widely from 0.24 to 0.98. CONCLUSION Use-of-time tools have indicated moderate reliability and validity for the assessment of physical activity and energy expenditure. Future research should focus on using criterion methods and on validating specifically for sedentary behaviour outcomes. Implementation of these tools for population surveillance should be considered.
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Affiliation(s)
- L Foley
- Clinical Trials Research Unit, University of Auckland, Auckland, New Zealand.
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Tsiros M, Buckley J, Howe P, Olds T, Walkley J, Taylor L, Mallows R, Hills A, Kagawa M, Coates A. Obesity the new disability? Investigating the impact of fatness on day-to-day physical functioning in 10–13 year olds. Obes Res Clin Pract 2011. [DOI: 10.1016/j.orcp.2011.08.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Daniell N, Olds T, Tomkinson G. The importance of site location in girth measurement. J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2010.10.527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Maher C, De Wilde J, Ells L, Hohepa M, Lissner L, Ogden C, Peneau S, Zimmermann M, Zumin S, Olds T. The plateauing prevalence of childhood obesity and overweight—Evidence from nine countries. J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2010.10.488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
BACKGROUND Health outcomes measurement is integral to planning and evaluating paediatric health care. Recent outcome measures have been developed to capture children's participation in everyday activities, a core component of which is the child's perceived satisfaction. Satisfaction, however, is a complex concept and it is not known how children conceptualize satisfaction and hence how it should best be measured. The purpose of this study was to explore children's conceptualization of the term 'satisfaction' and compare this with the description of satisfaction given in the literature to inform how satisfaction can be assessed in children. METHODS Forty children aged between 10 and 15 years participated in eight focus groups, guided by a descriptive qualitative approach, to describe how they conceptualize 'satisfaction'. Children with disabilities were excluded as it was considered important to first ascertain how children without disabilities conceptualize satisfaction. Recruitment occurred through seven urban and rural public schools. Data were analysed using qualitative content analysis. RESULTS Participants identified three methods by which a person may determine their level of satisfaction (i) making comparisons with previous experiences, and other's and self-expectations; (ii) evaluating one's emotions; and (iii) receiving positive external feedback. Participants described drawing upon one of these methods in isolation, rather than integrating outcomes from each method into one judgement of satisfaction. Participants also demonstrated confusion between the terms 'satisfaction' and 'satisfactory'. CONCLUSIONS Partial congruence between children's conceptualization of satisfaction and that reported in the literature was observed in this study. Not all children between the ages of 10 and 15, however, have a full understanding of satisfaction. Caution must therefore be taken when using the term satisfaction in children's assessments to minimize the potential for varying interpretations of the question. Further studies are required to explore how children with disabilities view the term satisfaction and if their understanding differs to that of typically developing children.
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Affiliation(s)
- R L Taylor
- Health and Use of Time (HUT) Group, School of Health Sciences, University of South Australia, Adelaide, SA, Australia.
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Olds T, Maher C, Ferrar K, Tomkinson G. Childhood obesity - are we there yet? J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2009.10.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ridley K, Olds T, Dollman J, Maher C, Kittel D. Descriptive epidemiology of sedentary time and associations with physical activity in Australian young people. J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2009.10.389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Olds T, Ridley K, Blunden S. The hours before bedtime: Do screens keep young people awake? J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2009.10.386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Gomersall S, Olds T, Ridley K. Development and evaluation of an adult use-of-time instrument with an energy expenditure focus: The adult MARCA. J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2009.10.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Maddison R, Mhurchu CN, Jiang Y, Hoorn SV, Turley M, Olds T, Ridley K, Mitchelhill G, Utter J, Denny S. A national survey of physical activity behaviour: Preliminary results from the mission-on evaluation in New Zealand. J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2009.10.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Olds T, Maher C. Screen time is more strongly associated than physical activity with weight status in Australian adolescents. J Sci Med Sport 2010. [DOI: 10.1016/j.jsams.2009.10.278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Olds T, Dollman J, Kupke T. How adolescents use their time on holidays. J Sci Med Sport 2009. [DOI: 10.1016/j.jsams.2008.12.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
AIM To compare self-reported school-day sleep duration in 10- to 15-year-old South Australians between 1985 and 2004. METHODS Data were collected from 10- to 15-year-old participants in the 1985 Australian Schools Health and Fitness Survey (n = 390) and the 2004 South Australian Physical Activity Survey (n = 510). Identical self-report questionnaires were administered in both surveys, providing data on school-day bed-time, wake-time and sleep duration; as well as age, gender and socioeconomic status (SES). Analysis of co-variance (ANCOVA), controlling for age and SES, was used to compare all sleep variables between surveys. RESULTS Declines in sleep duration were found for both girls (28 min) and boys (33 min) between surveys. The reduction was more pronounced in 'lower SES' boys (44 min) than 'higher SES' boys (23 min). Boys reported later bed-time than girls in the 2004 survey, while no gender differences were apparent in the 1985 survey. CONCLUSION Our findings suggest reductions in school-day sleep duration have occurred in Australian children and adolescents over the last 20 years, due largely to later bed-times. The physiological significance of these declines and mediating influences, such as SES, are yet to be explicated.
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Affiliation(s)
- J Dollman
- Nutritional Physiology Research Centre, University of South Australia, Adelaide, South Australia, Australia.
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