| 1. |
- Ojiambo, Robert, et al.
(författare)
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Validity of hip-mounted uniaxial accelerometry with heart-rate monitoring vs. triaxial accelerometry in the assessment of free-living energy expenditure in young children: the IDEFICS Validation Study
- 2012
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Ingår i: Journal of applied physiology (Bethesda, Md. : 1985). - : American Physiological Society. - 1522-1601 .- 8750-7587. ; 113:10, s. 1530-1536
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Tidskriftsartikel (refereegranskat)abstract
- One of the aims of Identification and Prevention of Dietary- and Lifestyle-Induced Health Effects in Children and Infants (IDEFICS) validation study is to validate field measures of physical activity (PA) and Energy expenditure (EE) in young children. This study compared the validity of uni-axial accelerometry with heart-rate (HR) monitoring vs. tri-axial accelerometry against doubly labeled water (DLW) criterion method for assessment of free-living EE in young children. 49 European children (25 female, 24 male) aged 4-10 years (mean age 7 ± 2 years) were assessed by uni-axial ActiTrainer with HR, uni-axial 3DNX and tri-axial 3DNX accelerometry. Total energy expenditure (TEE) was estimated using DLW over a 1 week period. The longitudinal axis of both devices and tri-axial 3DNX counts per minute (CPM) were significantly (P<0.05) associated with physical activity level (PAL) (r = 0.51 ActiTrainer, r = 0.49 uni-axial-3DNX and r = 0.42 tri-axial ∑3DNX). 86% of the variance in TEE could be predicted by a model combining body mass (Partial r(2) = 71%; P<0.05), CPM-ActiTrainer (Partial r(2) = 11%; P<0.05) and difference between HR at moderate and sedentary activities (ModHR - SedHR; Partial r(2) = 4%; P<0.05) The standard error (S.E) of TEE estimate for ActiTrainer and 3DNX models ranged from 0.44-0.74 MJ/d or approximately 7-11% of the average TEE. The S.E of activity-induced energy expenditure (AEE) model estimates ranged from 0.38-0.57 MJ/d or 24-26% of the average AEE. It is concluded that the comparative validity of hip-mounted uni-axial and tri-axial accelerometers for assessing PA and EE is similar.
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| 2. |
- Sprengeler, Ole, et al.
(författare)
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Trajectories of objectively measured physical activity and childhood overweight : longitudinal analysis of the IDEFICS/I.Family cohort
- 2021
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Ingår i: International Journal of Behavioral Nutrition and Physical Activity. - : BioMed Central. - 1479-5868. ; 18:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Since only few longitudinal studies with appropriate study designs investigated the relationship between objectively measured physical activity (PA) and overweight, the degree PA can prevent excess weight gain in children, remains unclear. Moreover, evidence is limited on how childhood overweight determines PA during childhood. Therefore, we analyzed longitudinal trajectories of objectively measured PA and their bi-directional association with weight trajectories of children at 2- and 6-year follow-ups. Methods: Longitudinal data of three subsequent measurements from the IDEFICS/I.Family cohort study were used to analyze the bi-directional association between moderate-to-vigorous PA (MVPA) and weight status by means of multilevel regression models. Analyses comprised 3393 (2-year follow-up) and 1899 (6-year follow-up) children aged 2–15.9 years from eight European countries with valid accelerometer data and body mass index (BMI) measurements. For categorized analyses, children’s weight status was categorized as normal weight or overweight (cutoff: 90th percentile of BMI) and children’s PA as (in-) sufficiently active (cutoffs: 30, 45 and 60 min of MVPA per day). Results: Children engaging in at least 60 min MVPA daily at baseline and follow-ups had a lower odds of becoming overweight (odds ratio [OR] at 2-year follow-up: 0.546, 95% CI: 0.378, 0.789 and 6-year follow-up: 0.393, 95% CI: 0.242, 0.638), compared to less active children. Similar associations were found for 45 min MVPA daily. On the other side, children who became overweight had the lowest odds to achieve 45 or 60 min MVPA daily (ORs: 0.459 to 0.634), compared to normal weight children. Conclusions: Bi-directional associations between MVPA and weight status were observed. In summary, at least 60 min MVPA are still recommended for the prevention of childhood overweight. To prevent excess weight gain, 45 min MVPA per day also showed preventive effects.
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| 3. |
- Verbestel, Vera, et al.
(författare)
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Are context-specific measures of parental-reported physical activity and sedentary behaviour associated with accelerometer data in 2-9-year-old European children?
- 2015
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Ingår i: Public Health Nutrition. - : Cambridge University Press. - 1368-9800 .- 1475-2727. ; 18:5, s. 860-868
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Tidskriftsartikel (refereegranskat)abstract
- Objective: The aim of the present study was to investigate if context-specific measures of parental-reported physical activity and sedentary behaviour are associated with objectively measured physical activity and sedentary time in children. Design: Cross-sectional study. Setting: Seven European countries taking part in the IDEFICS (Identification and Prevention of Dietary-and Lifestyle-induced Health Effects in Children and Infants) study. Subjects: Data were analysed from 2-9-year-old children (n 5982) who provided both parental-reported and accelerometer-derived physical activity/sedentary behaviour measures. Parents reported their children's daily screen-time, weekly sports participation and daily outdoor playtime by means of the Outdoor Playtime Checklist (OPC) and Outdoor Playtime Recall Questions (OPRQ). Results: Sports participation, OPC-and OPRQ-derived outdoor play were positively associated with accelerometer-derived physical activity. Television viewing and computer use were positively associated with accelerometer-derived sedentary time. All parental-reported measures that were significantly associated with accelerometer outcomes explained only a minor part of the variance in accelerometer-derived physical activity or sedentary time. Conclusions: Parental-reported measures of physical activity and sedentary behaviour are not useful as a proxy for 2-9-year-old children's physical activity and sedentary time. Findings do not preclude the use of context-specific measures but imply that conclusions should be limited to the context-specific behaviours that are actually measured. Depending on the aim of the study, future research should carefully consider the choice of measurements, including the use of subjective or objective measures of the behaviour of interest or a combination of both.
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| 4. |
- Verbestel, Vera, et al.
(författare)
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Using the intervention mapping protocol to develop a community-based intervention for the prevention of childhood obesity in a multi-centre European project: the IDEFICS intervention.
- 2011
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Ingår i: The international journal of behavioral nutrition and physical activity. - : Springer Science and Business Media LLC. - 1479-5868. ; 8
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Tidskriftsartikel (refereegranskat)abstract
- ABSTRACT: Background: The prevalence of childhood obesity has increased during the past decades and is now considered an urgent public health problem. Although stabilizing trends in obesity prevalence have been identified in parts of Europe, preventive efforts in children are still needed. Using the socio-ecological approach as the underlying theoretical perspective, the IDEFICS project aimed to develop, implement and evaluate a community-based intervention for the prevention of childhood obesity in eight European countries. The aim of the present manuscript was to describe the content and developmental process of the IDEFICS intervention. Methods: The intervention mapping protocol (IMP) was used to develop the community-based intervention for the prevention of childhood obesity in 3 to 10 years old children. It is a theory- and evidence-based tool for the structured planning and development of health promotion programs that requires the completion of six different steps. These steps were elaborated by two coordinating centers and discussed with the other participating centers until agreement was reached. Focus group research was performed in all participating centers to provide an informed basis for intervention development. Results: The application of the IMP resulted in an overall intervention framework with ten intervention modules targeting environmental and personal factors through the family, the school and the community. The summary results of the focus group research were used to inform the development of the overall intervention. The cultural adaptation of the overall intervention was realised by using country specific focus group results. The need for cultural adaptation was considered during the entire process to improve program adoption and implementation. A plan was developed to evaluate program effectiveness and quality of implementation. Conclusions: The IDEFICS project developed a community-based intervention for the prevention of childhood obesity by using to the intervention mapping heuristic. The IDEFICS intervention consists of a general and standardized intervention framework that allows for cultural adaptation to make the intervention feasible and to enhance deliverability in all participating countries. The present manuscript demonstrates that the development of an intervention is a long process that needs to be done systematically. Time, human resources and finances need to be planned beforehand to make interventions evidence-based and culturally relevant.
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