The IDEFICS validation study on field methods for assessing physical activity and body composition in children: design and data collection

Bamann, K.; Sioen, Isabelle; Huybrechts, Inge; Casajús, José Antonio; Vincente-Rodriguez, G.; Cuthill, Ruth; Konstabel, Kenn; Tubić, Bojan; Wawro, Nina; Rayson, Mark P.; Westerterp, Klaas R.; Marrild, S.; Pitsiladis, Yannis; Reilly, John J.; Moreno, Luís A.; Henauw, Stefaan De

doi:10.1038/ijo.2011.38

Cited by 36 publications

(26 citation statements)

References 34 publications

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“…Despite extensive efforts, it was not possible to achieve the recruitment target of 50 participants. However, this sample is similar to previous DLW validation studies of similar tools [34][35][36][37][38][39]. Baseline characteristics of participants are presented in Table 2.…”

Section: Resultsmentioning

confidence: 75%

“…Another DLW validation of a similar tool, the Self-Administered Physical Activity Checklist, indicated a difference between methods of 239 kcal/day (r=0.49) [36]. A final study has collected DLW and physical activity questionnaire data on a relatively large number of children (n=92) across four European countries; however, results of the validation have not yet been published [37].…”

Section: Discussionmentioning

confidence: 97%

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Doubly labeled water validation of a computerized use-of-time recall in active young people

et al. 2013

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Section: Resultsmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 97%

Doubly labeled water validation of a computerized use-of-time recall in active young people

et al. 2013

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“…A validation study was carried out to compare uniaxial and triaxial accelerometers in children and to validate them using doubly labelled water as the gold standard, and to also validate body composition measures using three-and fourcompartment models. 34 Ultrasonometry was compared with dual-energy X-ray absorptiometry to assess bone mineral density in a sample of children from Sweden and Belgium. 35 The data set was made available for analysis on a protected central data server for remote online analyses.…”

Section: Quality Managementmentioning

confidence: 99%

The IDEFICS cohort: design, characteristics and participation in the baseline survey

et al. 2011

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Background: The European IDEFICS (Identification and prevention of dietary-and lifestyle-induced health effects in children and infants) study was set up to determine the aetiology of overweight, obesity and related disorders in children, and to develop and evaluate a tailored primary prevention programme. Objective: This paper focuses on the aetiological element of the multicentre study, the measures and examinations, sociodemographic characteristics of the study sample and proportions of participation. Design: Prospective cohort study with an embedded intervention study that started with a baseline survey in eight countries in [2007][2008]. Subjects and measurements: Baseline participants of the prospective cohort study were 16 224 children aged 2-9 years. Parents reported sociodemographic, behavioural, medical, nutritional and other lifestyle data for their children and families. Examinations of children included anthropometry, blood pressure, fitness, accelerometry, DNA from saliva and physiological markers in blood and urine. The built environment, sensory taste perception and other mechanisms of children's food choices and consumer behaviour were studied in subgroups. Results: Between 1507 and 2567, children with a mean age of 6.0 years and an even sex distribution were recruited from each country. Of them, 82% lived in two-parent families. The distribution of standardised income levels differed by study sample, with low-income groups being strongly represented in Cyprus, Italy and Germany. At least one 24-h dietary recall was obtained for two-thirds of the children. Blood pressure and anthropometry were assessed in more than 90%. A 3-day accelerometry was performed in 46%, motor fitness was assessed in 41%, cardiorespiratory fitness in 35% and B11% participated in taste perception tests. The proportion of children donating venous blood, urine and saliva was 57, 86 and 88%, respectively. Conclusion: The IDEFICS cohort provides valuable data to investigate the interplay of social, environmental, genetic, physiological and behavioural factors in the development of major diet-and lifestyle-related disorders affecting children at present.

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“…9 This paper describes the reliability and validity of the 3DNX, adding to the knowledge base, assisting researchers in their choice of device for studies such as IDEFICS (Identification and prevention of dietary-and lifestyleinduced health effects in children and infants). A validation study on B100 IDEFICS children comparing both a wellknown uniaxial and the 3DNX with a gold standard measure of energy expenditure will provide information about the relative merits of the two devices 19 to measure movement and energy expenditure in the target population. The aims of this paper are fourfold.…”

Section: Introductionmentioning

confidence: 99%

Reliability and validity of the 3DNX accelerometer during mechanical and human treadmill exercise testing

Horner

Rayson²,

Bilzon

2011

Int J Obes

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Objective: This study aimed to assess the validity and reliability of the 3DNX triaxial accelerometer in a laboratory and mechanical setting. Methods: Experiment 1: A total of 10 units were fixed to a Multi-axis shaker table. A schedule comprising a range of accelerations was repeated on two occasions along each of the three measurement axes. Experiment 2: A total of 11 recreationally active individuals completed a treadmill protocol (4-20 km hr À1 ) on two occasions. Two 3DNX accelerometers were secured to the lower back, logging data every 5 s. Oxygen uptake was measured using the Douglas Bag technique. Reliability inter-and intra-units were assessed using a combination of limits of agreement (LoA), coefficient of variation (CV) and intra-class correlation coefficient (ICC). Validity was assessed using simple linear regression. All data are expressed in counts per 5 s (counts 5 s À1 ). Results: Experiment 1: CV intra ranged from 0.0 to 8.9% in all axes. The absolute bias ± 95% LoA values were all below four counts 5 s À1 . CV inter did not rise above 4.5%. ICCs were 1.0 for all stages in all axes. The relationship between 3DNX counts and acceleration yielded an R 2 value of 0.99 and a standard error of the estimate (SEE) of six counts 5 s À1 . Experiment 2: CV inter ranged from 7.7 to 16.0% for trial 1 and from 7.7 to 16.2% for trial 2. ICCs between units ranged from 0.95 to 1.00 for trial 1 and from 0.90 to 0.99 for trial 2. Mean ratio bias ± 95% LoA values for intra-unit and inter-unit reliability were À0.7% (P40.05)±12.4% and 0.4% (P40.05)±5.6%, respectively. The relationship between . VO 2 and 3DNX counts for walking and running was linear (R 2 ¼ 0.65, SEE ¼ 1.42 ml kg À1 min À1 ; R 2 ¼ 0.62, SEE ¼ 3.63 ml kg À1 min À1 ). Conclusion:The 3DNX accelerometer is a reliable and valid device for measuring acceleration in a mechanical setting and during human treadmill exercise.

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The IDEFICS validation study on field methods for assessing physical activity and body composition in children: design and data collection

Cited by 36 publications

References 34 publications

Doubly labeled water validation of a computerized use-of-time recall in active young people

Doubly labeled water validation of a computerized use-of-time recall in active young people

The IDEFICS cohort: design, characteristics and participation in the baseline survey

Reliability and validity of the 3DNX accelerometer during mechanical and human treadmill exercise testing

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