2024
DOI: 10.1136/bmjopen-2023-080437
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Intervention to increase physical activity and healthy eating among under-represented adolescents: GOAL trial protocol

Lorraine B Robbins,
Jiying Ling,
Karin A Pfeiffer
et al.

Abstract: IntroductionTo reduce obesity-related disparities, reaching economically disadvantaged and/or minority status adolescents to assist them in meeting physical activity (PA) and nutrition recommendations is important. To address the problem, a 16-week intervention called Guys/Girls Opt for Activities for Life (GOAL) was designed. The purpose of this randomised controlled trial is to evaluate any effect of the intervention, compared with a control condition, on improving: (1) adolescents’ % body fat (primary outco… Show more

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“…Another aspect worth considering is the tools used to collect data, as these can be associated with biases such as recall bias 179 and biases introduced due to the Hawthorne effect 180 such as measurement reactivity, 181 social desirability bias, 182 and compensatory rivalry. 28 Because of the research context and RCT participants not being blinded to allocation, participants may have underestimated or overestimated their responses 183 or may have acted differently than how they usually would have, both limitations that influence internal validity. Thus, the use of self-reported data to measure the primary and secondary outcomes (Paper IV) is a limitation.…”
Section: Trustworthiness and Potential Sources Of Biasesmentioning
confidence: 99%
“…Another aspect worth considering is the tools used to collect data, as these can be associated with biases such as recall bias 179 and biases introduced due to the Hawthorne effect 180 such as measurement reactivity, 181 social desirability bias, 182 and compensatory rivalry. 28 Because of the research context and RCT participants not being blinded to allocation, participants may have underestimated or overestimated their responses 183 or may have acted differently than how they usually would have, both limitations that influence internal validity. Thus, the use of self-reported data to measure the primary and secondary outcomes (Paper IV) is a limitation.…”
Section: Trustworthiness and Potential Sources Of Biasesmentioning
confidence: 99%