Acceptability of smartphone-based assessments of physical activity and diet among a cohort of adolescents in Kunming, China
ISPAH ePoster Library. Hua J. Oct 15, 2018; 225403; 516
Jenna Hua
Jenna Hua
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Abstract Introduction. The advent of mobile technology to monitor physical activity and diet has created unprecedented opportunities to quantify physical activity and diet in real-world settings. The purpose of this study was to investigate the acceptability of smartphone-based assessments of physical activity and diet among a cohort of adolescents in Kunming, China.Methods. 308 adolescents (44% male, 56% female) aged 16-18 were recruited from two local high schools in Kunming, China in 2015. Participants were given smartphones with CalFit app to carry for a week. CalFit app measures physical activity with accelerometry and diet with voice-annotated videos of meals. Participants were then asked to complete a 20-question survey assessing the acceptability of CalFit app. Their body mass index (BMI) was calculated using their weights and heights measured by trained study assistants.Results. The mean BMI of the cohort was 21.6 kg/m2. 90% of the participants had prior experience using smartphones. 92% of the participants reported CalFit app was easy to understand and operate. 73% reported using voice-annotated video to record diet was easy, but 89% reported that they preferred taking photos rather than videos. 41% reported it was hard for them to carry the study phone every day. There were no statistically significant differences in CalFit acceptability in terms of participants’ weight statuses; however, significant differences between males and females were observed.Conclusion. Findings indicated that CalFit app was acceptable for assessing adolescent’s physical activity and diet. However, using photos instead of videos to record diet were preferred among Chinese adolescents. External funding details This research was supported by the Postdoctoral Fellowship in Cardiovascular Disease Prevention (T32) from the National Heart, Lung and Blood Institute (NHLBI), National Institute of Health (NIH); the Ruth L. Kirschstein National Research Service Award for Individual Predoctoral Fellows (Parent F31), National Cancer Institute (NCI), NIH; the Fulbright Program, United States Department of State; Pamela and Kenneth Fong Graduate Student Fellowship, Center for Chinese Studies, UC Berkeley; Douglas Fowler Scholarship, UC Berkeley Public Health Alumni Association; C. C. Chen Foundation Fellowship, UC Berkeley and Norman P. and Pansy L. Chan Fellowship, UC Berkeley.
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