Evaluation of a smartphone application for dietary intake assessment in adolescents
(English)Manuscript (preprint) (Other academic)
Objective To develop a smartphone application and evaluate its ability to assess energy intake (EI) and total energy expenditure (TEE) compared with objectively measured TEE. Furthermore, to investigate the impact of factors on reporting accuracy of EI, and to compare dietary intake with a web-based method.
Methods Participants were recruited from year nine in schools in Västra Götaland, Sweden. In total, 81 adolescents used the smartphone application over 1‒6 days. TEE was measured with SenseWear Armband (SWA) during the same or proximate days. Individual factors were assessed with a questionnaire. Fifteen participants also recorded dietary intake using a web-based method.
Results The smartphone application underestimated EI by 29% on group level (P < 0.001), and there was no significant correlation between EI and objectively measured TEE. Accuracy of EI relative to TEE increased with a weekend day in the record (P = 0.007) and lower BMI-z (P = 0.001). TEE assessed with the smartphone application was 1.19 times TEE measured by SWA on group level (P < 0.001), and the correlation between the methods was 0.66 (P < 0.001). Analysis of TEE stratified by gender showed that accuracy of the smartphone application was higher among boys. EI, nutrients and food groups assessed with the smartphone application and web-based method were not significantly different and several were significantly correlated.
Conclusions Using a smartphone dietary assessment application, 71% of EI in adolescents was captured, and BMI-z and a weekend day in the record influenced reporting accuracy. A daily question about physical activity could accurately rank participants according to TEE.
adolescents, dietary assessment, smartphone application, energy, SenseWear armband
Other Social Sciences not elsewhere specified
Research subject Food and Nutrition
IdentifiersURN: urn:nbn:se:umu:diva-97355OAI: oai:DiVA.org:umu-97355DiVA: diva2:772243