Test-retest reliability and construct validity of the ENERGY-child questionnaire on energy balance-related behaviours an
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RESEARCH
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Test-retest reliability and construct validity of the ENERGY-child questionnaire on energy balancerelated behaviours and their potential determinants: the ENERGY-project Amika S Singh1*, Froydis N Vik2, Mai JM Chinapaw1, Léonie Uijtdewilligen1, Maïté Verloigne3, Juan M Fernández-Alvira4, Sarolta Stomfai5, Yannis Manios6, Marloes Martens7 and Johannes Brug8
Abstract Background: Insight in children’s energy balance-related behaviours (EBRBs) and their determinants is important to inform obesity prevention research. Therefore, reliable and valid tools to measure these variables in large-scale population research are needed. Objective: To examine the test-retest reliability and construct validity of the child questionnaire used in the ENERGY-project, measuring EBRBs and their potential determinants among 10-12 year old children. Methods: We collected data among 10-12 year old children (n = 730 in the test-retest reliability study; n = 96 in the construct validity study) in six European countries, i.e. Belgium, Greece, Hungary, the Netherlands, Norway, and Spain. Test-retest reliability was assessed using the intra-class correlation coefficient (ICC) and percentage agreement comparing scores from two measurements, administered one week apart. To assess construct validity, the agreement between questionnaire responses and a subsequent face-to-face interview was assessed using ICC and percentage agreement. Results: Of the 150 questionnaire items, 115 (77%) showed good to excellent test-retest reliability as indicated by ICCs > .60 or percentage agreement ≥ 75%. Test-retest reliability was moderate for 34 items (23%) and poor for one item. Construct validity appeared to be good to excellent for 70 (47%) of the 150 items, as indicated by ICCs > .60 or percentage agreement ≥ 75%. From the other 80 items, construct validity was moderate for 39 (26%) and poor for 41 items (27%). Conclusions: Our results demonstrate that the ENERGY-child questionnaire, assessing EBRBs of the child as well as personal, family, and school-environmental determinants related to these EBRBs, has good test-retest reliability and moderate to good construct validity for the large majority of items. Keywords: child questionnaire, self-report, psychometric, physical activity, sedentary behaviour, soft drinks, fruit juice, active transport, breakfast
Background Energy balance-related behaviours (EBRBs), i.e. lack of physical activity, excess sedentary behaviour and unhealthy dietary patterns are considered to be important contributors to the obesity epidemic [1]. In order * Correspondence: [email protected] 1 VU University Medical Center, EMGO Institute for Health and Care Research, Dpt. of Public and Occupational Health, Amsterdam, the Netherlands Full list of author information is available at the end of the article
to adequately inform prevention and intervention research on lifestyle behaviours, the assessment of EBRBs and their personal and environmental correlates and potential determinants is of utmost importance. Large-scal
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