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Spiegler J, El-Awad U, Baumann N, Lemola S, Wolke D. Participation in club sport in childhood is associated with mental health in preterm and term born adolescents. Eur Child Adolesc Psychiatry 2024; 33:2823-2830. [PMID: 38291168 PMCID: PMC11272685 DOI: 10.1007/s00787-023-02365-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 12/20/2023] [Indexed: 02/01/2024]
Abstract
Preterm born individuals have an increased risk for mental health problems. Participation in club sport is associated with better mental health but the causal direction is unclear. It is not known whether this association could also be found in preterm children. Data from term born (N = 10,368), late preterm (N = 630), and very to moderately preterm born (N = 243) children from the Millennium Cohort Study at the ages of 3, 5, 7, 11, and 14 years were used. Longitudinal associations between the parent-reported Strengths and Difficulties questionnaire (SDQ) and club sport participation (days per week) were analysed using multigroup structural equation modelling, adjusting for gender, maternal depression, parental education; motor problems and attrition were controlled for. Multi-group structural equation modelling showed that children with more peer relationship problems, emotional symptoms, conduct problems or hyperactivity-inattention were less likely to participate in club sport at subsequent assessment time points. More days with club sport participation was associated with lower levels of emotional symptoms and peer relationship problems but not conduct problems or hyperactivity-inattention at subsequent ages. Results were similar in all gestational age groups. Club sport participation predicts lower levels of peer relationship and emotional problems in subsequent waves while it is also predicted by lower levels of emotional problems, peer relationship problems, conduct problems and hyperactivity-inattention in preceding waves. Since no differences in the relationship between SDQ subscales and club sport participation were seen with regard to gestational age groups, club sport should be encouraged in all children.
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Affiliation(s)
- Juliane Spiegler
- Department of Paediatrics, University Hospital of Würzburg, Josef-Schneider-Strasse 2, 97080, Würzburg, Germany.
- Department of Psychology, University of Warwick, University Road, Coventry, CV4 7AL, UK.
| | - Usama El-Awad
- Faculty of Psychology and Sports Sciences, University of Bielefeld, P.O. Box 10 01 31, 33501, Bielefeld, Germany
| | - Nicole Baumann
- Department of Psychology, University of Warwick, University Road, Coventry, CV4 7AL, UK
- Department of Population Health Sciences, University of Leicester, University Road, Leicester, LE1 7RH, UK
- Turner Institute for Brain and Mental Health, School of Psychological Sciences, Monash University, Level 5, 18 Innovation Walk, Clayton Campus, Melbourne, VIC, 3800, Australia
| | - Sakari Lemola
- Department of Psychology, University of Warwick, University Road, Coventry, CV4 7AL, UK
- Faculty of Psychology and Sports Sciences, University of Bielefeld, P.O. Box 10 01 31, 33501, Bielefeld, Germany
| | - Dieter Wolke
- Department of Psychology, University of Warwick, University Road, Coventry, CV4 7AL, UK
- Division of Mental Health & Wellbeing, University of Warwick, University Road, Coventry, CV4 7AL, UK
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Martínez-Zamora MD, Martín-Martínez C, Martínez-de-Quel Ó, Valenzuela PL. Influence of Preterm Birth and Low Birthweight on Physical Fitness: A Systematic Review, Meta-Analysis, and Meta-Regression. Sports Med 2024; 54:1907-1919. [PMID: 38709451 PMCID: PMC11258071 DOI: 10.1007/s40279-024-02026-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2024] [Indexed: 05/07/2024]
Abstract
BACKGROUND Preterm birth and low birthweight (LBW) might be associated with reduced physical fitness, although evidence remains inconclusive. OBJECTIVE To examine the influence of preterm birth and LBW on physical fitness, as well as to assess whether variables such as gestational age, birthweight, or age at assessment moderate these effects. METHODS PubMed, Scopus, and PsycINFO were systematically searched from inception to 7 December 2023 for case-control and cohort studies analyzing the association between preterm birth or LBW (or gestational age or birthweight as continuous variables) with at least one physical fitness-related outcome (i.e., cardiorespiratory fitness (CRF), muscle strength, flexibility, speed, agility). Random-effects meta-analysis and meta-regression models were used to estimate the pooled effect size, as well as to examine potential associations between the magnitude of the effect and gestational age, birthweight, or age at assessment. RESULTS Fifty-two studies (n = 920,603 participants, average age ranging from 4.7 to 34.4 years) were included. Preterm birth was associated with reduced CRF (standardized mean difference (SMD) = -0.38, 95% confidence interval (CI) = -0.51 to -0.25) and muscle strength (SMD = -0.44, 95% CI = -0.79 to -0.08). LBW was associated with reduced CRF (SMD = -0.40, 95% CI = -0.64 to -0.17), muscle strength (SMD = -0.18, 95% CI = -0.24 to -0.13), flexibility (SMD = -0.11, 95% CI = -0.22 to -0.01), and agility (SMD = -0.99, 95% CI = -1.91 to -0.07). Meta-regression analyses showed that a lower gestational age or birthweight were associated with larger reductions in physical fitness, whereas no consistent association was found for the age at assessment. CONCLUSION Both preterm birth and LBW seem associated with reduced physical fitness regardless of age, with larger reductions overall observed in individuals with lower gestational age or birthweight. These findings might support the implementation of preventive strategies (e.g., fitness monitoring and physical exercise interventions) in these populations through the life course. PROSPERO registration: CRD42021231845.
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Affiliation(s)
| | | | - Óscar Martínez-de-Quel
- Faculty of Education, Complutense University of Madrid, Madrid, Spain.
- Faculty of Sciences for Physical Activity and Sport (INEF), Polytechnic University of Madrid, C/Martín Fierro, 7, 28040, Madrid, Spain.
| | - Pedro L Valenzuela
- Department of Systems Biology, University of Alcalá, Madrid, Spain.
- Physical Activity and Health Research Group (PaHerg), Instituto de Investigación Hospital 12 de Octubre ('imas12'), Centro de Actividades Ambulatorias, 7ª Planta, Bloque D, Av. de Córdoba s/n, 28041, Madrid, Spain.
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Bruun E, Pätsi P, Leskinen M, Björkman K, Kulmala P, Tulppo MP, Valkama M, Ojaniemi M. Preterm-Born Young Women Have Weaker Hand Grip Strength Compared to Their Full-Term-Born Peers. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1898. [PMID: 38136100 PMCID: PMC10741946 DOI: 10.3390/children10121898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/29/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023]
Abstract
Prematurity has been linked to lower muscular fitness and increased morbidity across the human lifespan. Hand grip strength is widely used as a measure of muscle strength. Previous studies have shown inconsistent results regarding the role of vitamin D in hand grip strength. Here, we investigated hand grip strength and the effects of a yearlong vitamin D supplementation in healthy preterm-born young adults. We recruited 38 young adults born preterm at either ≤32 weeks' gestation or <34 weeks' gestation and weighing <1500 g, as well as 39 gender- and age-matched controls, for this study. Anthropometric measurements, hand grip strengths, and vitamin D concentrations were recorded. These investigations were repeated after a yearlong vitamin D supplementation intervention. There was a significant difference in the age- and gender-specific hand grip strength ranks between the preterm- and full-term-born young adults: 57.9% and 30.7%, respectively, were below average (p = 0.009). In the preterm-born group, the females had significantly lower hand grip strengths compared to their full-term-born peers, with a mean difference of -3.46 kg (95% CI: -6.68 to -0.247; p = 0.035). In a linear regression analysis, the preterm-born female adult height was negatively associated with hand grip strength (R2 = 0.24, F (1.43) = 13.61, p < 0.001). The vitamin D concentrations were increased after the supplementation period, with no association with hand grip strength. According to our results, preterm-born young females are at risk for lower muscle strength, independent of their current vitamin D status.
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Affiliation(s)
- Ella Bruun
- Department of Pediatrics, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90220 Oulu, Finland (M.O.)
- Research Unit of Clinical Medicine, University of Oulu, 90014 Oulu, Finland
- Medical Research Center, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90014 Oulu, Finland
| | - Pauli Pätsi
- Department of Pediatrics, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90220 Oulu, Finland (M.O.)
- Research Unit of Clinical Medicine, University of Oulu, 90014 Oulu, Finland
- Medical Research Center, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90014 Oulu, Finland
| | - Markku Leskinen
- Department of Pediatrics, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90220 Oulu, Finland (M.O.)
- Research Unit of Clinical Medicine, University of Oulu, 90014 Oulu, Finland
- Medical Research Center, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90014 Oulu, Finland
| | - Krista Björkman
- Department of Pediatrics, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90220 Oulu, Finland (M.O.)
- Research Unit of Clinical Medicine, University of Oulu, 90014 Oulu, Finland
- Medical Research Center, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90014 Oulu, Finland
| | - Petri Kulmala
- Department of Pediatrics, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90220 Oulu, Finland (M.O.)
- Research Unit of Clinical Medicine, University of Oulu, 90014 Oulu, Finland
- Medical Research Center, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90014 Oulu, Finland
- Faculty of Medicine, University of Oulu, 90014 Oulu, Finland
| | - Mikko P. Tulppo
- Faculty of Medicine, University of Oulu, 90014 Oulu, Finland
- Research Unit of Biomedicine and Internal Medicine, University of Oulu, 90014 Oulu, Finland
| | - Marita Valkama
- Department of Pediatrics, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90220 Oulu, Finland (M.O.)
- Research Unit of Clinical Medicine, University of Oulu, 90014 Oulu, Finland
- Medical Research Center, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90014 Oulu, Finland
| | - Marja Ojaniemi
- Department of Pediatrics, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90220 Oulu, Finland (M.O.)
- Research Unit of Clinical Medicine, University of Oulu, 90014 Oulu, Finland
- Medical Research Center, Oulu University Hospital, University of Oulu, Wellbeing Services County of North Ostrobothnia, 90014 Oulu, Finland
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Martinez-Zamora MD, Valenzuela PL, Esteban Díez I, Martínez-de-Quel Ó. Influence of preterm birth on physical fitness in early childhood. Eur J Sport Sci 2023; 23:2129-2138. [PMID: 37093663 DOI: 10.1080/17461391.2023.2207082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
Evidence suggests that preterm birth is associated with an impaired physical fitness later in life, but whether these effects are already visible since early childhood remains unknown. We aimed to compare the physical fitness of preterm preschoolers with that of children born at term. Children aged three to six years and born preterm (<35 weeks) were recruited from a Neonatal Intensive Care Unit, and children born at term (>37 weeks) were included as controls. A variety of physical fitness indicators (strength, cardiorespiratory fitness, agility, flexibility and balance) were assessed with the PREFIT battery and the adapted sit and reach test. Physical activity levels were measured through the PrePAQ questionnaire. A total of 98 preterm children (gestational age 32.4 ± 2.3 weeks, age 5.1 ± 0.8 years) and 74 controls (gestational age 39.9 ± 1.0 weeks, age 4.8 ± 0.9 years) were analysed. Despite no significant differences in physical activity levels (p > 0.05), preterm children showed an overall poorer physical fitness compared to controls. Specifically, preterm children had an impaired handgrip strength (-13.95%, p < 0.001), lower-limb muscle strength (-12.67%, p = 0.003), agility (-14.9%, p = 0.001), cardiorespiratory fitness (-12.73% p = 0.005) and flexibility (-17.04%, p = 0.001) compared to controls. An inverse dose-response association was observed between the level of prematurity and physical fitness, with very preterm children (gestational age ≤32 weeks) presenting the poorest fitness levels. In summary, prematurity seems to impair physical fitness since early childhood, which might support the need for promoting preventive strategies (e.g. fitness monitoring and applying exercise interventions).Highlights Preterm children present an impaired physical fitness compared with peers born at term since early childhood (3-6 years), as reflected by lower muscle strength, agility, flexibility and cardiorespiratory fitness.A greater impairment of physical fitness in observed in children born very preterm (≤32 weeks of gestation).These findings might support the implementation of preventive strategies (e.g. fitness monitoring and exercise training) in preterm children since early childhood.
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Affiliation(s)
| | - Pedro L Valenzuela
- Physical Activity and Health Research Group (PaHerg), Research Institute of Hospital 12 de Octubre ('i+12'), Madrid, Spain
- Department of Systems Biology, University of Alcalá, Madrid, Spain
| | - Inés Esteban Díez
- Neonatal Intensive Care Unit, San Pedro Hospital Rioja Salud, Logroño, Spain
| | - Óscar Martínez-de-Quel
- Faculty of Education, Complutense University of Madrid, Madrid, Spain
- Faculty of Sciences for Physical Activity and Sport (INEF), Polytechnic University of Madrid, 28040 Madrid, Spain
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5
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O'Dea CA, Beaven ML, Wilson AC, Smith EF, Maiorana A, Simpson SJ. Preterm birth and exercise capacity: what do we currently know? Front Pediatr 2023; 11:1222731. [PMID: 37868270 PMCID: PMC10587559 DOI: 10.3389/fped.2023.1222731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 09/12/2023] [Indexed: 10/24/2023] Open
Abstract
Objectives The long-term cardiopulmonary outcomes following preterm birth during the surfactant era remain unclear. Respiratory symptoms, particularly exertional symptoms, are common in preterm children. Therefore, cardiopulmonary exercise testing may provide insights into the pathophysiology driving exertional respiratory symptoms in those born preterm. This review aims to outline the current knowledge of cardiopulmonary exercise testing in the assessment of children born preterm in the surfactant era. Design This study is a narrative literature review. Methods Published manuscripts concerning the assessment of pulmonary outcomes using cardiopulmonary exercise testing in preterm children (aged <18 years) were reviewed. Search terms related to preterm birth, bronchopulmonary dysplasia, and exercise were entered into electronic databases, including Medline, PubMed, and Google Scholar. Reference lists from included studies were scanned for additional manuscripts. Results Preterm children have disrupted lung development with significant structural and functional lung disease and increased respiratory symptoms. The association between these (resting) assessments of respiratory health and exercise capacity is unclear; however, expiratory flow limitation and an altered ventilatory response (rapid, shallow breathing) are seen during exercise. Due to the heterogeneity of participants, treatments, and exercise protocols, the effect of the aforementioned limitations on exercise capacity in children born preterm is conflicting and poorly understood. Conclusion Risk factors for reduced exercise capacity in those born preterm remain poorly understood; however, utilizing cardiopulmonary exercise testing to its full potential, the pathophysiology of exercise limitation in survivors of preterm birth will enhance our understanding of the role exercise may play. The role of exercise interventions in mitigating the risk of chronic disease and premature death following preterm birth has yet to be fully realized and should be a focus of future robust randomized controlled trials.
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Affiliation(s)
- Christopher A O'Dea
- Respiratory Medicine, Perth Children's Hospital, Perth, WA, Australia
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, Perth, WA, Australia
| | - Michael L Beaven
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, Perth, WA, Australia
- School of Allied Health, Curtin University, Perth, WA, Australia
| | - Andrew C Wilson
- Respiratory Medicine, Perth Children's Hospital, Perth, WA, Australia
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, Perth, WA, Australia
- School of Allied Health, Curtin University, Perth, WA, Australia
| | - Elizabeth F Smith
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, Perth, WA, Australia
- School of Allied Health, Curtin University, Perth, WA, Australia
| | - Andrew Maiorana
- School of Allied Health, Curtin University, Perth, WA, Australia
- Department of Allied Health, Fiona Stanley Hospital, Perth, WA, Australia
| | - Shannon J Simpson
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, Perth, WA, Australia
- School of Allied Health, Curtin University, Perth, WA, Australia
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Carregã M, Sousa P, Rocha G, Ferreira-Magalhães M, Azevedo I. Respiratory and non-respiratory outcomes of bronchopulmonary dysplasia in adolescents: A systematic review. Early Hum Dev 2023; 180:105756. [PMID: 36965348 DOI: 10.1016/j.earlhumdev.2023.105756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/17/2023] [Accepted: 03/17/2023] [Indexed: 03/27/2023]
Abstract
BACKGROUND There is lack of evidence synthesis on the global consequences of bronchopulmonary dysplasia (BPD) in adolescence. AIM Assess the impact of bronchopulmonary dysplasia on respiratory and non-respiratory outcomes in adolescents. METHODS A systematic review of studies assessing the outcomes of adolescents aged 10 to 19 years-old with BPD was conducted. We independently screened studies published until 6th March 2023 in PubMed® and Scopus® databases. Data on methodologic design, sample descriptive and findings were extracted from each study. Risk of bias was assessed using quality assessment tools. RESULTS Thirty-one studies were included. Adolescents with a history of BPD present with more respiratory symptoms (wheezing, respiratory exacerbations, need for respiratory medication) and twenty-five studies showed a reduction in pulmonary function, with varying impact according to BPD severity and no differences before and after the surfactant era. Spirometry evaluation throughout the years is not consensual, but methacholine and salbutamol response in BPD groups is increased compared to non-BPD groups. Markers of eosinophilic airway inflammation are not increased as in asthma patients. Exercise potential is identical, but data regarding physical capacity and activity are inconsistent. More frequent radiologic abnormalities translate into higher high-resolution computed tomography scores, with linear (72.2 %) and triangular subpleural opacities (58.3 %) as the most common findings. There is a higher risk for special needs in education, but quality of life seems to be equal to non-BPD adolescents. CONCLUSIONS BPD negatively impacts both pulmonary and non-pulmonary outcomes in adolescents.
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Affiliation(s)
- Mariana Carregã
- Unidade Local de Saúde de Matosinhos, Portugal; Medicine Faculty, University of Porto, Portugal.
| | - Patrícia Sousa
- Department of Pediatrics, Centro Hospitalar Universitário do São João, Porto, Portugal
| | - Gustavo Rocha
- Department of Neonatology, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Manuel Ferreira-Magalhães
- Department of Pediatric Pulmonology, Centro Materno Infantil do Norte, Centro Hospitalar Universitário do Porto, Porto, Portugal; Center for Health Technology and Services Research (CINTESIS), Porto, Portugal; Department of Child and Adolescent Medicine, Abel Salazar Biomedical Sciences Institute, Porto, Portugal; Department of Medicine of Community, Information and Health Decision (MEDCIDS), Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Inês Azevedo
- Department of Pediatrics, Centro Hospitalar Universitário do São João, Portugal; Department of Gynecology-Obstetrics and Pediatrics, Faculdade de Medicina da Universidade do Porto, Porto, Portugal; EPIUnit, Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal.
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7
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Sports participation and preterm birth: a nationwide birth cohort in Japan. Pediatr Res 2022; 92:572-579. [PMID: 34707251 DOI: 10.1038/s41390-021-01808-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 08/08/2021] [Accepted: 10/09/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Children born preterm may be less physically active than children born term because of neurocognitive problems, reduced lung function, and poor physical fitness. We evaluated sports participation of children and adolescents who had been born preterm (<37 weeks) and early term (37-38 weeks) in 2001. METHODS Data from a nationwide longitudinal survey (n = 47,015, including 2375 children born preterm) were analyzed. As indicators of sports participation, we used responses to questions about participation in sports clubs at 7 and 10 years old and in extracurricular school sports at 15 years old. RESULTS Children born very preterm (25-31 weeks) and moderately to late preterm (32-36 weeks) were less likely to participate in sports clubs at 7, 10, and 15 years old than children born full term (39-41 weeks). Compared with children born full term, the adjusted risk ratios for participation in extracurricular school sports at 15 years old were 0.86 (95% confidence interval: 0.75-0.98) for children born very preterm, 0.92 (0.88-0.97) for children born moderately to late preterm, and 1.00 (0.98-1.02) for children born early term. CONCLUSIONS Our findings suggest that preterm birth is associated with less participation in organized sports during childhood and adolescence than full-term birth. IMPACT Research investigating associations between preterm birth and physical activity among children born in the 2000s is limited. This study shows that preterm birth was associated with less participation in organized sports during childhood and adolescence than full-term birth, especially in boys, and the participation in organized sports of children born preterm decreased as gestation shortened. During childhood, boys born early term were also less likely to participate in organized sports than boys born full term, suggesting a continuum with preterm births. These findings offer important additional insights into the limited evidence available for predicting future health outcomes for preterm infants.
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Yang J, Epton MJ, Harris SL, Horwood J, Kingsford RA, Troughton R, Greer C, Darlow BA. Reduced Exercise Capacity in Adults Born Very Low Birth Weight: A Population-Based Cohort Study. Am J Respir Crit Care Med 2021; 205:88-98. [PMID: 34499592 DOI: 10.1164/rccm.202103-0755oc] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Population-based data regarding the consequences of very low birth weight (VLBW) and bronchopulmonary dysplasia (BPD) on adult exercise capacity is limited. OBJECTIVES To compare exercise capacity in a national VLBW cohort with term-born controls and explore factors contributing to the differences. METHODS At 26-30 years of age, 228 VLBW survivors and 100 controls underwent lung function tests, cardiopulmonary exercise testing and assessment of resting cardiac structure/function using echocardiography. Data on self-reported physical activity were collected. MEASUREMENTS AND MAIN RESULTS Compared with controls, VLBW adults demonstrated reduced oxygen uptake, work rate and oxygen pulse at peak exercise (9.3%, 10.7%, 10.8% lower, respectively) and earlier anaerobic threshold (all p<0.0001), with all mean values within normal range. VLBW survivors showed reduced physical activity, impaired lung function (reduced FEV1, FEV1/FVC, DLCO), altered left ventricular structure/function (reduced mass, size, stroke volume, cardiac output) and reduced right atrial/ventricular size. Adjustment for the combination of three sets of covariates (physical activity with BMI, lung function, cardiac structure/function) explained most of the exercise group-differences. Beyond the effects of physical activity and BMI, lung function and cardiac structure/function contributed approximately equally. BPD with other prematurity-related perinatal factors (ventilation, antenatal steroids, extremely low birth weight, extreme preterm) were not associated with a reduced exercise capacity. CONCLUSIONS Exercise capacity was significantly reduced in VLBW adults, which we speculate is from combined effects of impaired lung function, altered heart structure/function and reduced physical activity. Perinatal factors including BPD were not associated with a reduced exercise capacity.
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Affiliation(s)
- Jun Yang
- Canterbury District Health Board, 63588, Respiratory Physiology Laboratory, Christchurch Hospital, Christchurch, New Zealand;
| | - Michael J Epton
- Canterbury District Health Board, 63588, Canterbury Respiratory Research Group, Christchurch, New Zealand
| | - Sarah L Harris
- University of Otago Christchurch, 2494, Department of Pediatrics, Christchurch, New Zealand
| | - John Horwood
- University of Otago Christchurch, 2494, Department of Psychological Medicine, Christchurch, New Zealand
| | - Rachel A Kingsford
- Canterbury District Health Board, 63588, Respiratory Physiology Laboratory, Christchurch Hospital, Christchurch, New Zealand
| | - Richard Troughton
- Canterbury District Health Board, 63588, Department of Cardiology, Christchurch Hospital, Christchurch, New Zealand.,University of Otago Christchurch, 2494, Department of Medicine, Christchurch, New Zealand
| | - Charlotte Greer
- Canterbury District Health Board, 63588, Department of Cardiology, Christchurch Hospital, Christchurch, New Zealand
| | - Brian A Darlow
- University of Otago Christchurch, 2494, Department of Pediatrics, Christchurch, New Zealand
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O'Dea CA, Logie K, Wilson AC, Pillow JJ, Murray C, Banton G, Simpson SJ, Hall GL, Maiorana A. Lung abnormalities do not influence aerobic capacity in school children born preterm. Eur J Appl Physiol 2020; 121:489-498. [PMID: 33141263 DOI: 10.1007/s00421-020-04530-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 10/12/2020] [Indexed: 11/27/2022]
Abstract
PURPOSE Children born preterm have impaired lung function and altered lung structure. However, there are conflicting reports on how preterm birth impacts aerobic exercise capacity in childhood. We aimed to investigate how neonatal history and a diagnosis of bronchopulmonary dysplasia (BPD) impact the relationship between function and structure of the lung, and aerobic capacity in school-aged children born very preterm. METHODS Preterm children (≤ 32 w completed gestation) aged 9-12 years with (n = 38) and without (n = 35) BPD, and term-born controls (n = 31), underwent spirometry, lung volume measurements, gas transfer capacity, a high-resolution computer tomography (CT) scan of the chest, and an incremental treadmill exercise test. RESULTS Children born preterm with BPD had an elevated breathing frequency to tidal volume ratio compared to term controls (76% vs 63%, p = 0.002). The majority (88%) of preterm children had structural changes on CT scan. There were no differences in peak V̇O2 (47.1 vs 47.7 mL/kg/min, p = 0.407) or oxygen uptake efficiency slope when corrected for body weight (67.6 vs 67.3, p = 0.5) between preterm children with BPD and term controls. There were no differences in any other exercise outcomes. The severity of structural lung disease was not associated with exercise outcomes in this preterm population. CONCLUSION Children born preterm have impaired lung function, and a high prevalence of structural lung abnormalities. However, abnormal lung function and structure do not appear to impact on the aerobic exercise capacity of preterm children at school age.
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Affiliation(s)
- Christopher A O'Dea
- Respiratory Medicine, Perth Children's Hospital, Perth, WA, Australia.,School of Physiotherapy and Exercise Science, Curtin University, GPO Box U1987, Perth, WA, 6845, Australia.,Telethon Kids Institute, Perth, WA, Australia
| | - Karla Logie
- Telethon Kids Institute, Perth, WA, Australia.,Centre for Child Health Research, University of Western Australia, Perth, WA, Australia.,Division of Paediatrics and Child Health, Medical School, University of Western Australia, Perth, WA, Australia
| | - Andrew C Wilson
- Respiratory Medicine, Perth Children's Hospital, Perth, WA, Australia.,School of Physiotherapy and Exercise Science, Curtin University, GPO Box U1987, Perth, WA, 6845, Australia.,Telethon Kids Institute, Perth, WA, Australia.,Centre for Child Health Research, University of Western Australia, Perth, WA, Australia
| | - J Jane Pillow
- Division of Paediatrics and Child Health, Medical School, University of Western Australia, Perth, WA, Australia.,School of Human Sciences, University of Western Australia, Perth, WA, Australia
| | - Conor Murray
- Diagnostic Imaging, Perth Children's Hospital, Perth, WA, Australia
| | | | - Shannon J Simpson
- School of Physiotherapy and Exercise Science, Curtin University, GPO Box U1987, Perth, WA, 6845, Australia.,Telethon Kids Institute, Perth, WA, Australia.,Centre for Child Health Research, University of Western Australia, Perth, WA, Australia
| | - Graham L Hall
- Respiratory Medicine, Perth Children's Hospital, Perth, WA, Australia.,School of Physiotherapy and Exercise Science, Curtin University, GPO Box U1987, Perth, WA, 6845, Australia.,Telethon Kids Institute, Perth, WA, Australia.,Centre for Child Health Research, University of Western Australia, Perth, WA, Australia
| | - Andrew Maiorana
- School of Physiotherapy and Exercise Science, Curtin University, GPO Box U1987, Perth, WA, 6845, Australia. .,Allied Health Department and Advanced Heart Failure and Cardiac Transplant Service, Fiona Stanley Hospital, Perth, WA, Australia.
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Harris C, Lunt A, Bisquera A, Peacock J, Greenough A. Lung function and exercise capacity in prematurely born young people. Pediatr Pulmonol 2020; 55:2289-2295. [PMID: 32568429 DOI: 10.1002/ppul.24918] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/17/2020] [Accepted: 06/17/2020] [Indexed: 11/09/2022]
Abstract
OBJECTIVES To determine if lung function abnormalities in young people born very prematurely routinely exposed to antenatal corticosteroids and postnatal surfactant were associated with reduced exercise capacity. WORKING HYPOTHESIS In the current era, lung function abnormalities would not be associated with exercise intolerance STUDY DESIGN: Follow-up of young people from the United Kingdom Oscillation study (UKOS). PATIENT-SUBJECT SELECTION One hundred twenty-six young people of 797 recruited to UKOS, born at a mean gestational age of 27 weeks were assessed at a mean age of 17 years. METHODOLOGY Forced expiratory flow at 75% of the expired vital capacity (FEF75 ), forced expiratory volume in 1 second (FEV1 ) and lung volumes (forced vital capacity [FVC]) and residual volume (RV) and functional residual capacity (FRCpleth ) were assessed. Abnormal lung function was below the fifth centile and very abnormal lung function below the 2.5th centile. Exercise capacity was assessed using a modified shuttle sprint test and self-reported hours of exercise. RESULTS Thirty-nine young people had an abnormal FEF75 with an adjusted reduction in sprint distance of 114 m (P = .018) and an adjusted difference in self-reported exercise of 0.73 hours (P = .036). Twenty-seven young people had a very abnormal FEF75 with an adjusted reduction in sprint distance of 159 m (P = .002) and adjusted reduction in self-reported exercise of 1.15 hours (P = .002). CONCLUSION Very prematurely born young people with abnormal airway function had a significant reduction in exercise capacity.
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Affiliation(s)
- Christopher Harris
- Department of Women and Children's Health, Faculty of Life Sciences & Medicine, School of Life Course Sciences, King's College London, London, UK
| | - Alan Lunt
- Department of Women and Children's Health, Faculty of Life Sciences & Medicine, School of Life Course Sciences, King's College London, London, UK
| | - Alessandra Bisquera
- Faculty of Life Sciences & Medicine, School of Population Health and Environmental Sciences, King's College London, London, UK
| | - Janet Peacock
- Faculty of Life Sciences & Medicine, School of Population Health and Environmental Sciences, King's College London, London, UK.,NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust and King's College London, London, UK
| | - Anne Greenough
- Department of Women and Children's Health, Faculty of Life Sciences & Medicine, School of Life Course Sciences, King's College London, London, UK.,NIHR Biomedical Research Centre at Guy's & St Thomas' NHS Foundation Trust and King's College London, London, UK.,The Asthma UK Centre for Allergic Mechanisms of Asthma, King's College London, London, UK
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11
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Haraldsdottir K, Watson AM, Pegelow DF, Palta M, Tetri LH, Levin T, Brix MD, Centanni RM, Goss KN, Eldridge MM. Blunted cardiac output response to exercise in adolescents born preterm. Eur J Appl Physiol 2020; 120:2547-2554. [DOI: 10.1007/s00421-020-04480-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 08/19/2020] [Indexed: 12/17/2022]
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12
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Prenzel F, Vogel M, Siekmeyer W, Körner A, Kiess W, Vom Hove M. Exercise capacity in children with bronchopulmonary dysplasia at school age. Respir Med 2020; 171:106102. [PMID: 32823240 DOI: 10.1016/j.rmed.2020.106102] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/23/2020] [Accepted: 07/27/2020] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To assess the exercise capacity, exercise habits, and lung function of preterm born children with bronchopulmonary dysplasia (BPD) compared to term born controls at school age. METHODS Cardiopulmonary exercise test (CPET) by cycle ergometer and pulmonary function test were performed in children with BPD (n = 42) and compared with a term born control group (n = 42). Daily activity, participation in sports and respiratory symptoms were assessed by questionnaire. RESULTS Children with BPD versus controls had significantly lower values for oxygen consumption (V̇O2 [mL/min] 1442 ± 417 vs. 1766 ± 541), minute ventilation (VE [L/min] 48 ± 14.92 vs. 60 ± 18.33), and workload (W [watt] 96.1 ± 16.7 vs. 110.6 ± 17.2) at peak exercise and a lower anaerobic threshold (VO2 AT [mL/min] 1183 ± 345 vs. 1382 ± 398). When corrected for weight, only for the workload (2.7 ± 0.5 vs. 3.1 ± 0.5, p = 0.0013) did significant differences persist. The forced expiratory volume in 1 s and forced expiratory flow between 25 and 75% of expired forced vital capacity were significantly reduced in the BPD group (p < 0.0001). Children with BPD have a higher risk of reporting difficulties in physical activity (OR 2.5) and of suffering from wheezing or shortness of breath while exercising (OR 2.5). CONCLUSION Compared to term born controls, children with BPD at school age show airflow obstruction, a lower workload in CPET, and more respiratory symptoms related to physical activity. The comparable oxygen consumption based on weight suggests a functionally normal alveolar compartment.
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Affiliation(s)
- Freerk Prenzel
- University of Leipzig Medical Center, Department of Pediatrics and Center for Pediatric Research Leipzig, Liebigstr. 20a, 04103, Leipzig, Germany.
| | - Mandy Vogel
- LIFE Leipzig Research Center for Civilization Diseases, Philipp-Rosenthal-Straße 2704103 Leipzig, Germany.
| | - Werner Siekmeyer
- University of Leipzig Medical Center, Department of Pediatrics and Center for Pediatric Research Leipzig, Liebigstr. 20a, 04103, Leipzig, Germany.
| | - Antje Körner
- University of Leipzig Medical Center, Department of Pediatrics and Center for Pediatric Research Leipzig, Liebigstr. 20a, 04103, Leipzig, Germany.
| | - Wieland Kiess
- University of Leipzig Medical Center, Department of Pediatrics and Center for Pediatric Research Leipzig, Liebigstr. 20a, 04103, Leipzig, Germany; LIFE Leipzig Research Center for Civilization Diseases, Philipp-Rosenthal-Straße 2704103 Leipzig, Germany.
| | - Maike Vom Hove
- University of Leipzig Medical Center, Department of Pediatrics and Center for Pediatric Research Leipzig, Liebigstr. 20a, 04103, Leipzig, Germany.
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13
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Engan M, Engeseth MS, Fevang S, Vollsæter M, Eide GE, Røksund OD, Halvorsen T, Clemm H. Predicting physical activity in a national cohort of children born extremely preterm. Early Hum Dev 2020; 145:105037. [PMID: 32438296 DOI: 10.1016/j.earlhumdev.2020.105037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 03/29/2020] [Indexed: 10/24/2022]
Abstract
UNLABELLED Predicting physical activity in a national cohort of children born extremely preterm. OBJECTIVES To compare physical activity among school-aged children born extremely preterm or with extremely low birthweight (EP/ELBW) to term-born children, and to identify early predictors for physical inactivity in the EP/ELBW-children. METHODS A national cohort born during 1999-2000 at gestational age < 28 weeks or birthweight <1000 g and term-born controls were assessed. EP/ELBW-children without neurodevelopmental disabilities were labeled "healthy". At five years, we examined the EP/ELBW-children's motor, mental and intellectual functioning using the Movement Assessment Battery for Children (MABC), The Strength and Difficulties Questionnaire (SDQ) and The Wechsler Preschool and Primary Scale of Intelligence-revised. At 11 years, the parents reported their children's physical activity (PA) in questionnaires. RESULTS Information was obtained from 231/372 EP/ELBW and 57/61 term-born children. At 11 years, EP/ELBW-children had fewer exercise events per week, were less engaged in team sports, had lower endurance, lower sports proficiency, and were less vigorous during PA than term-born children (p < 0.05). Low sports proficiency in the healthy EP/ELBW-children at 11 years was predicted (odds ratio; 95% confidence interval) by abnormal MABC-score (3.0; 1.0 to 8.7), and abnormal SDQ-score (4.0; 1.6 to 10.0) at 5 years. Lower endurance at PA was predicted by abnormal MABC-score (2.6; 1.0 to 6.6), abnormal SDQ-score (3.0; 1.4 to 6.5), and borderline intellectual functioning (4.2; 1.8 to 10.1). CONCLUSIONS Eleven-year-old EP/ELBW-children were less physically active than term-born. In healthy EP/ELBW-children, impaired motor coordination, borderline intellectual functioning and behavioral problems at 5 years of age predicted unfavorable PA habits at 11 years.
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Affiliation(s)
- Mette Engan
- Department of Clinical Science, University of Bergen, Norway; Department of Paediatric and Adolescent Medicine, Haukeland University Hospital, Bergen, Norway.
| | - Merete Salveson Engeseth
- Department of Clinical Science, University of Bergen, Norway; Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Norway
| | - Silje Fevang
- Department of Paediatric and Adolescent Medicine, Haukeland University Hospital, Bergen, Norway
| | - Maria Vollsæter
- Department of Clinical Science, University of Bergen, Norway; Department of Paediatric and Adolescent Medicine, Haukeland University Hospital, Bergen, Norway
| | - Geir Egil Eide
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway; Centre for Clinical Research, Haukeland University Hospital, Bergen, Norway
| | - Ola Drange Røksund
- Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Norway
| | - Thomas Halvorsen
- Department of Clinical Science, University of Bergen, Norway; Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway
| | - Hege Clemm
- Department of Clinical Science, University of Bergen, Norway; Department of Paediatric and Adolescent Medicine, Haukeland University Hospital, Bergen, Norway
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Differential Secretion of Angiopoietic Factors and Expression of MicroRNA in Umbilical Cord Blood from Healthy Appropriate-For-Gestational-Age Preterm and Term Newborns- in Search of Biomarkers of Angiogenesis-Related Processes in Preterm Birth. Int J Mol Sci 2020; 21:ijms21041305. [PMID: 32075190 PMCID: PMC7072966 DOI: 10.3390/ijms21041305] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/04/2020] [Accepted: 02/04/2020] [Indexed: 12/22/2022] Open
Abstract
Objectives: Premature birth, defined as less than 37 weeks gestation, affects approximately 12% of all live births around the world. Advances in neonatal care have resulted in the increased survival of infants born prematurely. Although prematurity is a known risk factor for different cardiovascular diseases, little is known about the pathophysiology of vasculature during premature gestation and angiopoietic factors network during premature birth. Aims: The objective of this study was to determine whether the profile of several pro-angiogenic and anti-angiogenic factors in umbilical cord blood (UCB) is different in healthy appropriate-for-gestational-age preterm newborns and normal term babies. The second aim of this study was to investigate the microRNA (miRNAs) expression profile in UCB from preterm labor and to detect miRNAs potentially taking part in control of angogenesis-related processes (Angio-MiRs). Methods: Using an immunobead Luminex assay, we simultaneously measured the concentration of Angiogenin, Angiopoietin-1, FGF-acidic, FGF-basic, PDGF-aa, PlGF, VEGF, VEGF-D, Endostatin, Thrombospondin-2, NGF, BDNF, GDNF, and NT-4 in UCB samples collected from the preterm (n = 27) and term (n = 52) delivery. In addition, the global microRNA expression in peripheral blood mononuclear cells (PBMCs) circulating in such UCB samples was examined in this study using microarray MiRNA technique. Results: The concentrations of five from eight measured pro-angiogenic factors (VEGF, Angiopoietin-1, PDGF-AA, FGF-a, and FGF-b) were significantly lower in UCB from preterm newborns. On the contrary, two angiostatic factors (Endostatin and Thrombospondin-2) were significantly up-regulated in preterm UCB. Among analyzed neurotrophins in preterm newborns, the elevated UCB concentration was found only in the case of GDNF, whereas BDNF was significantly reduced. Moreover, two angiopoietic factors, VEGF-D and PlGF, and two neurotrophins, NT4 and NGF, did not differ in concentration in preterm and term babies. We also discovered that among the significantly down-regulated miRNAs, there were several classical Angio-MiRs (inter alia MiR-125, MiR-126, MiR-145, MiR-150, or MiR155), which are involved in angiogenesis regulation in newborn after preterm delivery. Conclusions: This is the first report of simultaneous measurements of several angiopoietic factors in UCB collected from infants during preterm and term labor. Here, we observed that several pro-angiogenic factors were at lower concentration in UCB collected from preterm newborns than term babies. In contrast, the two measured angiostatic factors, Endostatin and Thrombospondin-2, were significantly higher in UCB from preterm babies. This can suggest that distinct pathophysiological contributions from differentially expressed various angiopoietic factors may determine the clinical outcomes after preterm birth. Especially, our angiogenesis-related molecules analysis indicates that preterm birth of healthy, appropriate-for-gestational-age newborns is an “anti-angiogenic state” that may provide an increased risk for improper development and function of cardiovascular system in the adulthood. This work also contributes to a better understanding of the role of miRNAs potentially involved in angiogenesis control in preterm newborns.
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15
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Ahlqvist VH, Persson M, Ortega FB, Tynelius P, Magnusson C, Berglind D. Birth Weight and Cardiorespiratory Fitness Among Young Men Born at Term: The Role of Genetic and Environmental Factors. J Am Heart Assoc 2020; 9:e014290. [PMID: 32000561 PMCID: PMC7033863 DOI: 10.1161/jaha.119.014290] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 12/16/2019] [Indexed: 01/20/2023]
Abstract
Background Preterm delivery and low birth weight are prospectively associated with low cardiorespiratory fitness (CRF). However, whether birth weight, within the at-term range, is associated with later CRF is largely unknown. Thus, the aim of the current study was to examine this issue and whether such association, if any, is explained by shared and/or nonshared familial factors. Methods and Results We conducted a prospective cohort study, including 286 761 young male adults and a subset of 52 544 siblings born at-term. Objectively measured data were retrieved from total population registers. CRF was tested at conscription and defined as the maximal load obtained on a cycle ergometer. We used linear and nonlinear and fixed-effects regression analyses to explore associations between birth weight and CRF. Higher birth weight, within the at-term range, was strongly associated with increasing CRF in a linear fashion. Each SD increase in birth weight was associated with an increase of 7.9 (95% CI, 7.8-8.1) and 6.6 (95% CI; 5.9-7.3) Wmax in the total and sibling cohorts, respectively. The association did not vary with young adulthood body mass index. Conclusions Birth weight is strongly associated with increasing CRF in young adulthood among men born at-term, across all categories of body mass index. This association appears to be mainly driven by factors that are not shared between siblings. Hence, CRF may to some extent be determined already in utero. Prevention of low birth weight, also within the at-term-range, can be a feasible mean of increasing adult CRF and health.
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Affiliation(s)
| | | | - Francisco B. Ortega
- PROFITH “PROmoting FITness and Health through physical activity” research groupDepartment of Physical Education and SportsFaculty of Sport SciencesUniversity of GranadaSpain
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
| | - Per Tynelius
- Department of Global Public HealthKarolinska InstitutetStockholmSweden
- Centre for Epidemiology and Community MedicineRegion StockholmStockholmSweden
| | - Cecilia Magnusson
- Department of Global Public HealthKarolinska InstitutetStockholmSweden
- Centre for Epidemiology and Community MedicineRegion StockholmStockholmSweden
| | - Daniel Berglind
- Department of Global Public HealthKarolinska InstitutetStockholmSweden
- Centre for Epidemiology and Community MedicineRegion StockholmStockholmSweden
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16
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Spiegler J, Eves R, Mendonça M, Wolke D. Association of physical activity and cardiorespiratory function or BMI and body composition in preterm-born individuals: a systematic review. Acta Paediatr 2019; 108:1205-1214. [PMID: 30664798 DOI: 10.1111/apa.14726] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/17/2019] [Accepted: 01/18/2019] [Indexed: 12/01/2022]
Abstract
AIM To evaluate the association of physical activity (PA) and forced expiratory volume in one second (FEV1), peak oxygen consumption (pVO2), body mass index (BMI) and body composition in preterm-born individuals. METHODS Cochrane Library, EMBASE, MEDLINE, AMED, ERIC, Web of Science and PsycInfo were searched with no restriction on language and date of publication from inception to January 2018. Data were extracted comparing preterm-born individuals with different frequencies of PA and the outcome of interest. RESULTS One randomized controlled, two longitudinal and thirteen cross-sectional studies comprising 1922 preterm-born individuals aged 5-25 were included. Assessment varied from a PA program to accelerometer data, interviews and self-report questionnaires. In preterm-born children, more PA was associated with better cardiorespiratory function in those groups with impaired lung function or with lower BMI in those groups with increased risk factors, but no association was found in unimpaired children. In preterm-born adults, more PA was associated with higher pVO2 and lower BMI. CONCLUSION Only tentative conclusions can be drawn, especially regarding differences of the association of PA between preterm- and term-born populations. Further studies are needed to analyse the association of PA in preterm-born individuals with reduced cardiorespiratory function.
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Affiliation(s)
- Juliane Spiegler
- Department of Psychology and Division of Mental Health & Wellbeing University of Warwick Coventry UK
- Department of Paediatrics University of Lübeck Lübeck Germany
| | - Robert Eves
- Department of Psychology and Division of Mental Health & Wellbeing University of Warwick Coventry UK
| | - Marina Mendonça
- Department of Psychology and Division of Mental Health & Wellbeing University of Warwick Coventry UK
| | - Dieter Wolke
- Department of Psychology and Division of Mental Health & Wellbeing University of Warwick Coventry UK
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Huckstep OJ, Williamson W, Telles F, Burchert H, Bertagnolli M, Herdman C, Arnold L, Smillie R, Mohamed A, Boardman H, McCormick K, Neubauer S, Leeson P, Lewandowski AJ. Physiological Stress Elicits Impaired Left Ventricular Function in Preterm-Born Adults. J Am Coll Cardiol 2018; 71:1347-1356. [PMID: 29566820 PMCID: PMC5864965 DOI: 10.1016/j.jacc.2018.01.046] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/11/2018] [Accepted: 01/16/2018] [Indexed: 01/01/2023]
Abstract
BACKGROUND Experimental and clinical studies show that prematurity leads to altered left ventricular (LV) structure and function with preserved resting LV ejection fraction (EF). Large-scale epidemiological data now links prematurity to increased early heart failure risk. OBJECTIVES The authors performed echocardiographic imaging at prescribed exercise intensities to determine whether preterm-born adults have impaired LV functional response to physical exercise. METHODS We recruited 101 normotensive young adults born preterm (n = 47; mean gestational age 32.8 ± 3.2 weeks) and term (n = 54) for detailed cardiovascular phenotyping. Full clinical resting and exercise stress echocardiograms were performed, with apical 4-chamber views collected while exercising at 40%, 60%, and 80% of peak exercise capacity, determined by maximal cardiopulmonary exercise testing. RESULTS Preterm-born individuals had greater LV mass (p = 0.015) with lower peak systolic longitudinal strain (p = 0.038) and similar EF to term-born control subjects at rest (p = 0.62). However, by 60% exercise intensity, EF was 6.7% lower in preterm subjects (71.9 ± 8.7% vs 78.6 ± 5.4%; p = 0.004) and further declined to 7.3% below the term-born group at 80% exercise intensity (69.8 ± 6.4% vs 77.1 ± 6.3%; p = 0.004). Submaximal cardiac output reserve was 56% lower in preterm-born subjects versus term-born control subjects at 40% of peak exercise capacity (729 ± 1,162 ml/min/m2 vs. 1,669 ± 937 ml/min/m2; p = 0.021). LV length and resting peak systolic longitudinal strain predicted EF increase from rest to 60% exercise intensity in the preterm group (r = 0.68, p = 0.009 and r = 0.56, p = 0.031, respectively). CONCLUSIONS Preterm-born young adults had impaired LV response to physiological stress when subjected to physical exercise, which suggested a reduced myocardial functional reserve that might help explain their increased risk of early heart failure. (Young Adult Cardiovascular Health sTudy [YACHT]; NCT02103231).
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Affiliation(s)
- Odaro J Huckstep
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Wilby Williamson
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Fernando Telles
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Holger Burchert
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Mariane Bertagnolli
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Charlotte Herdman
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Linda Arnold
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Robert Smillie
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Afifah Mohamed
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Henry Boardman
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Kenny McCormick
- Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | - Stefan Neubauer
- Oxford Centre for Clinical Magnetic Resonance Research, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Paul Leeson
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Adam J Lewandowski
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom.
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Tikanmäki M, Kaseva N, Tammelin T, Sipola-Leppänen M, Matinolli HM, Eriksson JG, Järvelin MR, Vääräsmäki M, Kajantie E. Leisure Time Physical Activity in Young Adults Born Preterm. J Pediatr 2017; 189:135-142.e2. [PMID: 28751124 DOI: 10.1016/j.jpeds.2017.06.068] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/14/2017] [Accepted: 06/28/2017] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the amount of self-reported physical activity in young adults born prematurely compared with those born at term. STUDY DESIGN Unimpaired participants of the Preterm Birth Study (Preterm Birth and Early Life Programming of Adult Health and Disease) birth cohort study were studied at age 23.3 ± 1.2 (SD) years: 118 born early preterm (<34 weeks), 210 late preterm (34-36 weeks), and 311 born at term (≥37 weeks, controls). The participants completed a validated 30-item, 12-month physical activity questionnaire. The annual frequency and total volume of conditioning and nonconditioning leisure time physical activity and commuting physical activity were calculated and the data analyzed by means of linear regression. RESULTS Adults born early preterm reported a 31.5% (95% CI, 17.4-43.2) lower volume of leisure time physical activity (in metabolic equivalents [MET] h/year) and had a 2.0-fold increased OR (1.2-3.3) of being in the least active quintile than controls. Lower amounts of conditioning, nonconditioning, and commuting physical activity all contributed to the difference. In addition, early preterm participants undertook less vigorous physical activity (≥6 MET). No differences in physical activity were found between the late preterm and control groups. Adjustments for potential early life confounders and current mediating health characteristics did not change the results. CONCLUSIONS Young adults born early preterm engage less in leisure time physical activities than peers born at term. This finding may in part underlie the increased risk factors of cardiometabolic and other noncommunicable diseases in adults born preterm. Low physical activity is a risk factor for several noncommunicable diseases and amenable to prevention.
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Affiliation(s)
- Marjaana Tikanmäki
- Chronic Disease Prevention Unit, Department of Health, National Institute for Health and Welfare, Oulu, Helsinki, Finland; Institute of Health Sciences, University of Oulu, Oulu, Finland.
| | - Nina Kaseva
- Chronic Disease Prevention Unit, Department of Health, National Institute for Health and Welfare, Oulu, Helsinki, Finland
| | - Tuija Tammelin
- LIKES Research Center for Physical Activity and Health, Jyväskylä, Finland
| | - Marika Sipola-Leppänen
- Chronic Disease Prevention Unit, Department of Health, National Institute for Health and Welfare, Oulu, Helsinki, Finland; Institute of Health Sciences, University of Oulu, Oulu, Finland; PEDEGO Research Unit (Research Unit for Pediatrics, Dermatology, Clinical Genetics, Obstetrics and Gynecology), Medical Research Center Oulu (MRC Oulu), Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Hanna-Maria Matinolli
- Chronic Disease Prevention Unit, Department of Health, National Institute for Health and Welfare, Oulu, Helsinki, Finland; Institute of Health Sciences, University of Oulu, Oulu, Finland
| | - Johan G Eriksson
- Chronic Disease Prevention Unit, Department of Health, National Institute for Health and Welfare, Oulu, Helsinki, Finland; Department of General Practice and Primary Health Care, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Health Research Center, Helsinki, Finland
| | - Marjo-Riitta Järvelin
- Department of Epidemiology and Biostatistics, MRC-PHE Center for Environment & Health, School of Public Health, Imperial College London, United Kingdom; Center for Life Course Epidemiology, Faculty of Medicine, University of Oulu, Oulu, Finland; Biocenter Oulu, Oulu, Finland; Unit of Primary Care, Oulu University Hospital, Oulu, Finland
| | - Marja Vääräsmäki
- PEDEGO Research Unit (Research Unit for Pediatrics, Dermatology, Clinical Genetics, Obstetrics and Gynecology), Medical Research Center Oulu (MRC Oulu), Oulu University Hospital and University of Oulu, Oulu, Finland; Children, Adolescents and Families Unit, Department of Welfare, National Institute for Health and Welfare, Oulu, Finland
| | - Eero Kajantie
- Chronic Disease Prevention Unit, Department of Health, National Institute for Health and Welfare, Oulu, Helsinki, Finland; PEDEGO Research Unit (Research Unit for Pediatrics, Dermatology, Clinical Genetics, Obstetrics and Gynecology), Medical Research Center Oulu (MRC Oulu), Oulu University Hospital and University of Oulu, Oulu, Finland; Children's Hospital, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
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19
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Ferreira I, Gbatu PT, Boreham CA. Gestational Age and Cardiorespiratory Fitness in Individuals Born At Term: A Life Course Study. J Am Heart Assoc 2017; 6:e006467. [PMID: 28954725 PMCID: PMC5721855 DOI: 10.1161/jaha.117.006467] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 08/04/2017] [Indexed: 11/20/2022]
Abstract
BACKGROUND In contrast to the effects of preterm birth, the extent to which shorter gestational age affects the cardiorespiratory fitness (CRF) levels of individuals who were born at term (ie, between 37 and 42 weeks) is largely unknown. The aim of this study was to examine whether life-course CRF levels varied across different gestational ages within the at-term range. METHODS AND RESULTS The association between gestational age (in weeks) obtained from Child Health Services records and CRF, estimated from field and laboratory tests and expressed by maximal oxygen uptake level through adolescence to young adulthood, was examined in 791 participants in the Northern Ireland Young Hearts Study, all singletons born at term. Longitudinal data were analyzed with generalized estimating equations, accounting for important potential confounders. Mean levels of CRF were 45.6, 43.7, and 33.0 mL/kg per minute when participants were aged 12, 15, and 22 years, respectively. After adjustment for confounders, each week increase in gestational age was associated with 0.46 mL/kg per minute (95% confidence interval, 0.14-0.79) in CRF. Compared with individuals born full term (39-40 weeks, n=533) or late term (41-42 weeks, n=148), those who were born early term (37-38 weeks, n=110) had a higher incidence of poor CRF (risk ratio, 1.57; 95% confidence interval, 1.14-2.16). The changes in CRF through adolescence to young adulthood were similar across groups, with those born early term consistently displaying the lowest CRF. CONCLUSIONS These findings suggest that early-term births within the at-term range are linked to poorer CRF through adolescence to young adulthood, and may have important clinical and public health implications for policies about (avoidable) early-term deliveries given their recent increasing trends.
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Affiliation(s)
- Isabel Ferreira
- School of Public Health, The University of Queensland, Herston, Queensland, Australia
| | - Pei T Gbatu
- School of Public Health, The University of Queensland, Herston, Queensland, Australia
| | - Colin A Boreham
- Institute for Sport and Health, University College Dublin, Dublin, Ireland
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Hestnes J, Hoel H, Risa OJ, Romstøl HO, Røksund O, Frisk B, Thorsen E, Halvorsen T, Clemm HH. Ventilatory Efficiency in Children and Adolescents Born Extremely Preterm. Front Physiol 2017; 8:499. [PMID: 28751866 PMCID: PMC5508024 DOI: 10.3389/fphys.2017.00499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 06/29/2017] [Indexed: 11/14/2022] Open
Abstract
Purpose: Children and adolescents born extremely preterm (EP) have lower dynamic lung volumes and gas transfer capacity than subjects born at term. Most studies also report lower aerobic capacity. We hypothesized that ventilatory efficiency was poorer and that breathing patterns differed in EP−born compared to term−born individuals. Methods: Two area−based cohorts of participants born with gestational age ≤28 weeks or birth weight ≤1000 g in 1982−85 (n = 46) and 1991–92 (n = 35) were compared with individually matched controls born at term. Mean ages were 18 and 10 years, respectively. The participants performed an incremental treadmill exercise test to peak oxygen uptake with data averaged over 20 s intervals. For each participant, the relationship between exhaled minute ventilation (V˙E) and carbon dioxide output (V˙CO2) was described by a linear model, and the relationship between tidal volume (VT) and V˙E by a quadratic model. Multivariate regression analyses were done with curve parameters as dependent variables, and the categories EP vs. term−born, sex, age, height, weight and forced expiratory volume in 1 s (FEV1) as independent variables. Results: In adjusted analyses, the slope of the V˙E−V˙CO2 relationship was significantly steeper in the EP than the term-born group, whereas no group difference was observed for the breathing pattern, which was related to FEV1 only. Conclusion: EP-born participants breathed with higher V˙E for any given CO2 output, indicating lower ventilatory efficiency, possibly contributing to lower aerobic capacity. The breathing patterns did not differ between the EP and term−born groups when adjusted for FEV1.
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Affiliation(s)
- Julie Hestnes
- Department of Clinical Science, University of BergenBergen, Norway
| | - Hedda Hoel
- Department of Clinical Science, University of BergenBergen, Norway
| | - Ole J Risa
- Department of Clinical Science, University of BergenBergen, Norway
| | - Hanna O Romstøl
- Department of Clinical Science, University of BergenBergen, Norway
| | - Ola Røksund
- Department of Occupational Therapy, Physiotherapy and Radiography, Western Norway University of Applied ScienceBergen, Norway
| | - Bente Frisk
- Department of Occupational Therapy, Physiotherapy and Radiography, Western Norway University of Applied ScienceBergen, Norway.,Department of Physiotherapy, Haukeland University HospitalBergen, Norway
| | - Einar Thorsen
- Department of Clinical Science, University of BergenBergen, Norway
| | - Thomas Halvorsen
- Department of Clinical Science, University of BergenBergen, Norway.,Department of Paediatrics, Haukeland University HospitalBergen, Norway
| | - Hege H Clemm
- Department of Clinical Science, University of BergenBergen, Norway.,Department of Paediatrics, Haukeland University HospitalBergen, Norway
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Lung function development after preterm birth in relation to severity of Bronchopulmonary dysplasia. BMC Pulm Med 2017; 17:97. [PMID: 28666441 PMCID: PMC5493015 DOI: 10.1186/s12890-017-0441-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 06/23/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bronchopulmonary dysplasia (BPD) is a strong risk factor for respiratory morbidity in children born preterm. Our aims were to evaluate lung function in adolescents born preterm with and without a history of BPD, and to assess lung function change over time from school age. METHODS Fifty-one individuals born in Stockholm, Sweden between gestational ages 24 to 31 weeks (23 neonatally diagnosed with respiratory distress syndrome (RDS) but not BPD, and 28 graded as mild (n = 17), moderate (n = 7) or severe (n = 4) BPD) were examined in adolescence (13-17 years of age) using spirometry, impulse oscillometry (IOS), plethysmography, and ergospirometry. Comparison with lung function data from school age (6-8 years of age) was also performed. RESULTS Adolescents with a history of BPD had lower forced expiratory volume in 1 s (FEV1) compared to those without BPD (-0.61 vs.-0.02 z-scores, P < 0.05), with lower FEV1 values significantly associated with BPD severity (P for trend 0.002). Subjects with severe BPD had higher frequency dependence of resistance, R5-20, (P < 0.001 vs. non-BPD subjects) which is an IOS indicator of peripheral airway involvement. Between school age and adolescence, FEV1/FVC z-scores decreased in all groups and particularly in the severe BPD group (from -1.68 z-scores at 6-8 years to -2.74 z-scores at 13-17 years, p < 0.05 compared to the non-BPD group). CONCLUSIONS Our results of spirometry and IOS measures in the BPD groups compared to the non-BPD group suggest airway obstruction including involvement of peripheral airways. The longitudinal result of a decrease in FEV1/FVC in the group with severe BPD might implicate a route towards chronic airway obstruction in adulthood.
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Catch-up growth in the first two years of life in Extremely Low Birth Weight (ELBW) infants is associated with lower body fat in young adolescence. PLoS One 2017; 12:e0173349. [PMID: 28278233 PMCID: PMC5344416 DOI: 10.1371/journal.pone.0173349] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 02/20/2017] [Indexed: 12/25/2022] Open
Abstract
Aim To investigate growth patterns and anthropometrics in former extremely low birth weight (ELBW, <1000 g) children and link these outcomes to neurocognition and body composition in childhood. Methods ELBW children were examined at birth (n = 140), at 9 and 24 months (n≥96) and at approximately 11 years within the framework of the PREMATCH (PREMATurity as predictor children’s of Cardiovascular and renal Health) case–control (n = 93–87) study. Regional growth charts were used to convert anthropometrics into Z–scores. Catch–up growth in the first two years of life was qualified as present if ΔZ–score >0.67 SDS. At 11 years, anthropometrics, neurocognitive performance, body composition, grip strength and puberty scores were assessed. Results ELBW neonates displayed extra–uterine growth restriction with mean Z–scores for height, weight and head circumference of –0.77, –0.93 and –0.46 at birth, –1.61, –1.67 and –0.72 at 9 months, –1.22, –1.61 and –0.84 at 24 months, and –0.42, –0.49 and –1.09 at 11 years. ELBW children performed consistently worse on neurocognitive testing with an average intelligence quotient equivalent at 11 years of 92.5 (SD 13.1). Catch–up growth was not associated with neurocognitive performance. Compared to controls, ELBW cases had lower grip strength (13.6 vs. 15.9 kg) and percentage lean body weight (75.1 vs. 80.5%), but higher body fat (24.6 vs. 19.2%) and advanced puberty scores at 11 years (all P≤0.025). Catch–up growth for weight and height in the first two years of life in cases was associated with a lower percentage body fat compared to cases without catch–up growth (16.8% catch-up growth for weight vs. 25.7%, P<0.001; 20.9% catch-up for height vs. 25.8%, P = 0.049). Conclusions In young adolescence, former ELBW children still have difficulties to reach their target height. Compared to normal birth weight controls, ELBW adolescents show lower neurocognitive performance and grip strength and a higher percentage body fat, a potential risk factor for adverse health outcomes in adulthood. Our key finding is that catch–up growth in ELBW children in the first two years of life is associated with a lower percentage body fat and is therefore likely to be beneficial.
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Abstract
Physical activity (PA) is an important mediator of health and disease. Many correlates may play an important role in explaining differences in PA between populations; however, the role of birth outcomes such as prematurity on levels of PA is relatively poorly represented in the literature. Children born preterm may be at risk for reduced levels of PA as they have increased respiratory symptoms as well as decrements in lung function and exercise capacity. Emerging evidence suggests that the effects are prevalent across the whole range of gestational age. This review summarises the current literature in regards to levels of PA in preterm-born children and also explores PA in cohorts of young adults in order to contextualise the possible impact on long term risks to respiratory health.
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Svedenkrans J, Kowalski J, Norman M, Bohlin K. Low Exercise Capacity Increases the Risk of Low Cognitive Function in Healthy Young Men Born Preterm: A Population-Based Cohort Study. PLoS One 2016; 11:e0161314. [PMID: 27548612 PMCID: PMC4993500 DOI: 10.1371/journal.pone.0161314] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 08/03/2016] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Preterm birth is a risk factor for decreased exercise capacity and impaired cognitive functions in later life. The objective of this study was to disentangle the associations between preterm birth, physical fitness and cognitive performance in young adulthood. METHODS This population-based cohort study included 218,802 young men born in Sweden 1973-1983. Data on birth characteristics was obtained from the Medical Birth Register and linked to exercise capacity assessed by ergometer cycling and cognitive tests performed at conscription for military service in 1993-2001. Cognitive performance was assessed using stanine (STAndard NINE) scores. The results were adjusted for socioeconomic factors. RESULTS Exercise capacity was positively associated with cognitive performance across all gestational ages. The sub-group of men who were born extremely preterm (gestational age <28 weeks) and had low exercise capacity exhibited the lowest odds ratio (OR = 0.26, 95%CI:0.09-0.82) of having a cognitive function above the mean stanine score (2.9) for men born at term with normal birth weight. Men born extremely preterm with a high exercise capacity had similar or even higher ORs for cognitive function (OR = 0.59; 95% CI:0.35-0.99) than men born at term with low Wmax (OR = 0.57; 95% CI:0.55-0.59). CONCLUSIONS Physical fitness is associated with higher cognitive function at all gestational ages, also in young men born extremely preterm. Targeting early physical exercise may be a possible intervention to enhance cognitive performance and educational achievements in populations at risk, such as childhood and adult survivors of preterm birth.
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Affiliation(s)
- Jenny Svedenkrans
- Division of Pediatrics, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
- Department of Neonatology, Karolinska University Hospital, Stockholm, Sweden
- * E-mail: (JS); (KB)
| | - Jan Kowalski
- Division of Pediatrics, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Mikael Norman
- Division of Pediatrics, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
- Department of Neonatology, Karolinska University Hospital, Stockholm, Sweden
| | - Kajsa Bohlin
- Division of Pediatrics, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
- Department of Neonatology, Karolinska University Hospital, Stockholm, Sweden
- * E-mail: (JS); (KB)
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