Browsing by Author "Wilcox, Sara"
Now showing 1 - 5 of 5
Results Per Page
Sort Options
- ItemCrowdsourcing for self-monitoring: Using the Traffic Light Diet and crowdsourcing to provide dietary feedback.(0000-00-00) Turner-McGrievy, Gabrielle M; Wilcox, Sara; Kaczynski, Andrew T; Spruijt-Metz, Donna; Hutto, Brent E; Muth, Eric R; Hoover, AdamBackground Smartphone photography and crowdsourcing feedback could reduce participant burden for dietary self monitoring Objectives To assess if untrained individuals can accurately crowdsource diet quality ratings of food photos using the Traffic Light Diet TLD approach Methods Participants were recruited via Amazon Mechanical Turk and read a one page description on the TLD The study examined the participant accuracy score total number of correctly categorized foods as red yellow or green per person the food accuracy score accuracy by which each food was categorized and if the accuracy of ratings increased when more users were included in the crowdsourcing For each of a range of possible crowd sizes n 15 n 30 etc 10 000 bootstrap samples were drawn and a 95 confidence interval CI for accuracy constructed using the 2 5th and 97 5th percentiles Results Participants n 75 body mass index 28 0 7 5 age 36 11 59 attempting weight loss rated 10 foods as red yellow or green Raters demonstrated high red yellow green accuracy 75 examining all foods Mean accuracy score per participant was 77 6 14 0 Individual photos were rated accurately the majority of the time range 50 100 There was little variation in the 95 CI for each of the five different crowd sizes indicating that large numbers of individuals may not be needed to accurately crowdsource foods Conclusions Nutrition novice users can be trained easily to rate foods using the TLD Since feedback from crowdsourcing relies on the agreement of the majority this method holds promise as a low burden approach to providing diet quality feedback
- ItemDoes the type of weight loss diet affect who participates in a behavioral weight loss intervention? A comparison of participants for a plant-based diet versus a standard diet trial.(2013-12-24) Turner-McGrievy, Gabrielle M; Davidson, Charis R; Wilcox, SaraStudies have found that people following plant based eating styles such as vegan or vegetarian diets often have different demographic characteristics eating styles and physical activity PA levels than individuals following an omnivorous dietary pattern There has been no research examining if there are differences in these characteristics among people who are willing to participate in a weight loss intervention using plant based dietary approaches as compared to a standard reduced calorie approach which does not exclude food groups The present study compared baseline characteristics demographics dietary intake eating behaviors Eating Behavior Inventory and PA Paffenbarger Physical Activity Questionnaire of participants enrolling in two different 6 month behavioral weight loss studies the mobile Pounds Off Digitally mPOD study which used a standard reduced calorie dietary approach and the New Dietary Interventions to Enhance the Treatments for weight loss New DIETs study which randomized participants to follow one of five different dietary approaches vegan vegetarian pesco vegetarian semi vegetarian or omnivorous diets There were no differences in baseline demographics with the exception of New DIETs participants being older 48 5 8 3years versus 42 9 11 2 P 0 001 and having a higher Body Mass Index BMI 35 2 5 3kg m 2 versus 32 6 4 7kg m 2 P 0 001 than mPOD participants In age and BMI adjusted models there were no differences in EBI scores or in any dietary variables with the exception of vitamin C 85 6 5 9mg d mPOD versus 63 4 7 4mg d New DIETs P 0 02 New DIETs participants reported higher levels of intentional PA day 180 0 18 1kcal d than mPOD participants 108 8 14 4kcal d P 0 003 which may have been the result of New DIETs study recommendations to avoid increasing or decreasing PA during the study The findings of this study demonstrate that using plant based dietary approaches for weight loss intervention studies does not lead to a population which is significantly different from who enrolls in a standard behavioral weight loss study using a reduced calorie dietary approach
- ItemMobile apps for pediatric obesity prevention and treatment, healthy eating, and physical activity promotion: just fun and games?(2013-09-27) Schoffman, Danielle E; Turner-McGrievy, Gabrielle; Jones, Sonya J; Wilcox, SaraMobile applications apps offer a novel way to engage children in behavior change but little is known about content of commercially available apps for this population We analyzed the content of apps for iPhone iPad for pediatric weight loss healthy eating HE and physical activity PA Fifty seven apps were downloaded and tested by two independent raters Apps were coded for inclusion of the Expert Committee for Pediatric Obesity Prevention s ECPOP eight recommended strategies e g set goals and seven behavioral targets e g do 1 h of PA per day utilization of gaming elements and general characteristics Most apps lacked any expert recommendations n 35 61 4 The mean number of recommendations among apps that used recommendations was 3 6 2 7 out of 15 56 1 n 32 apps were classified as games and mean price per app was 1 05 1 66 Most apps reviewed lacked expert recommendations and could be strengthened by addition of comprehensive information about health behavior change and opportunities for goal setting
- ItemTrading pounds for points: Engagement and weight loss in a mobile health intervention.(0000-00-00) Hales, Sarah; Turner-McGrievy, Gabrielle M; Wilcox, Sara; Davis, Rachel E; Fahim, Arjang; Huhns, Michael; Valafar, HomayounObjective The objective of this study was to describe participant engagement and examine predictors of weight loss and points earned through the point based incentive system of the Social Pounds Off Digitally POD app Materials and methods Overweight and obese adults with Android smartphones tablets body mass index 25 49 9 kg m2 N 24 were recruited for a 3 month weight loss intervention Participants completed a survey assessing demographics and personality and had their weight measured Participants received the content of the intervention via podcasts and used the Social POD app to self monitor diet physical activity and weight The Social POD app contained tracking features in app notifications to track pre set goals for tracking newsfeed for updates on others goal attainment ability to earn and track points for usage exchanged for study provided prizes and a message screen Analyses examined relationships between percent weight loss personality characteristics and total points earned Results A total of 4843 points were earned mean 202 105 points participant Most participants earned all three prizes 62 5 followed by two prizes 21 no prizes 12 5 and one prize 4 Total points earned significantly predicted percent weight loss B 0 02 p 01 and higher conscientiousness significantly predicted greater total points earned B 10 27 p 01 but other personality characteristics assessed did not Conclusion A mobile app yielded moderately high participant engagement as demonstrated by points earned Earning points was significantly associated with percent weight loss and conscientiousness was significantly associated with total points earned Future research should examine whether point systems impact health behavior and weight loss when rewards are discontinued Clinical trial registration number NCT02344836
- ItemUsing Commercial Physical Activity Trackers for Health Promotion Research: Four Case Studies.(0000-00-00) Turner-McGrievy, Gabrielle; Jake-Schoffman, Danielle E; Singletary, Camelia; Wright, Marquivieus; Crimarco, Anthony; Wirth, Michael D; Shivappa, Nitin; Mandes, Trisha; West, Delia Smith; Wilcox, Sara; Drenowatz, Clemens; Hester, Andrew; McGrievy, Matthew JBACKGROUND Wearable physical activity PA trackers are becoming increasingly popular for intervention and assessment in health promotion research and practice The purpose of this article is to present lessons learned from four studies that used commercial PA tracking devices for PA intervention or assessment present issues encountered with their use and provide guidelines for determining which tools to use METHOD Four case studies are presented that used PA tracking devices iBitz Zamzee FitBit Flex and Zip Omron Digital Pedometer Sensewear Armband and MisFit Flash in the field two used the tools for intervention and two used the tools as assessment methods RESULTS The four studies presented had varying levels of success with using PA devices and experienced several issues that impacted their studies such as companies that went out of business missing data and lost devices Percentage ranges for devices that were lost were 0 to 29 and was 0 to 87 for those devices that malfunctioned or lost data CONCLUSIONS There is a need for low cost easy to use accurate PA tracking devices to use as both intervention and assessment tools in health promotion research related to PA