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Published on: March 19, 2021
Daily and Seasonal Influences on Dietary Self-monitoring Using a Smartphone Application
Christine A Pellegrini1, David E Conroy2, Siobhan M Phillips1
1Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL.
Objective:
To examine within-person variation in dietary self-monitoring during a 6-month technology-supported weight loss trial as a function of time-varying factors including time in the study, day of the week, and month of the year.
Methods:
Smartphone self-monitoring data were examined from 31 obese adults (aged 18-60 years) who participated in a 6-month technology-supported weight loss program. Multilevel regression modeling was used to examine within-person variation in dietary self-monitoring.
Results:
Participants recorded less as time in the study progressed. Fewer foods were reported on the weekends compared with weekdays. More foods were self-monitored in January compared with October; however, a seasonal effect was not observed.
Conclusions And Implications:
The amount of time in a study and day of the week were associated with dietary self-monitoring but not season. Future studies should examine factors that influence variations in self-monitoring and identify methods to improve technology-supported dietary self-monitoring adherence.
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