Browsing by Author "Turner-McGrievy, Gabrielle M"
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- ItemAre we sure that Mobile Health is really mobile? An examination of mobile device use during two remotely-delivered weight loss interventions.(2014-04-04) Turner-McGrievy, Gabrielle M; Tate, Deborah FThe m in mHealth is often thought of as the ability to receive health information and monitor behaviors on the go Little is known about how people actually use mobile vs traditional access methods and if access method affects engagement and health outcomes
- ItemComparison of traditional versus mobile app self-monitoring of physical activity and dietary intake among overweight adults participating in an mHealth weight loss program.(2013-04-12) Turner-McGrievy, Gabrielle M; Beets, Michael W; Moore, Justin B; Kaczynski, Andrew T; Barr-Anderson, Daheia J; Tate, Deborah FOBJECTIVE Self monitoring of physical activity PA and diet are key components of behavioral weight loss programs The purpose of this study was to assess the relationship between diet mobile app website or paper journal and PA mobile app vs no mobile app self monitoring and dietary and PA behaviors MATERIALS AND METHODS This study is a post hoc analysis of a 6 month randomized weight loss trial among 96 overweight men and women body mass index BMI 25 45 kg m 2 conducted from 2010 to 2011 Participants in both randomized groups were collapsed and categorized by their chosen self monitoring method for diet and PA All participants received a behavioral weight loss intervention delivered via podcast and were encouraged to self monitor dietary intake and PA RESULTS Adjusting for randomized group and demographics PA app users self monitored exercise more frequently over the 6 month study 2 6 0 5 days week and reported greater intentional PA 196 4 45 9 kcal day than non app users 1 2 0 5 days week PA self monitoring pUnder0 01 100 9 45 1 kcal day intentional PA p 0 02 PA app users also had a significantly lower BMI at 6 months 31 5 0 5 kg m 2 than non users 32 5 0 5 kg m 2 p 0 02 Frequency of self monitoring did not differ by diet self monitoring method p 0 63 however app users consumed less energy 1437 188 kcal day than paper journal users 2049 175 kcal day p 0 01 at 6 months BMI did not differ among the three diet monitoring methods p 0 20 CONCLUSIONS These findings point to potential benefits of mobile monitoring methods during behavioral weight loss trials Future studies should examine ways to predict which self monitoring method works best for an individual to increase adherence
- 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
- ItemPounds Off Digitally study: a randomized podcasting weight-loss intervention.(2009-09-21) Turner-McGrievy, Gabrielle M; Campbell, Marci K; Tate, Deborah F; Truesdale, Kimberly P; Bowling, J Michael; Crosby, LeliaBACKGROUND As obesity rates rise new weight loss methods are needed Little is known about the use of podcasting audio files for a portable music player or computer to promote weight loss despite its growing popularity DESIGN A 12 week RCT was conducted SETTING PARTICIPANTS The study sample comprised overweight men and women BMI 25 40 kg m 2 n 78 in the Raleigh Durham NC area INTERVENTION In 2008 participants were randomly assigned to receive 24 episodes of a currently available weight loss podcast control podcast or a weight loss podcast based on social cognitive theory SCT designed by the researchers enhanced podcast for 12 weeks MAIN OUTCOME MEASURES Weight was measured on a digital scale at baseline and follow up Both groups also completed questionnaires assessing demographic information food intake physical activity and SCT constructs at the introductory and 12 week meetings Additional questionnaires at the 12 week meeting assessed perceptions of the intervention RESULTS Data collection and analysis occurred in 2008 and intention to treat was used Enhanced group participants n 41 had a greater decrease in weight 2 9 3 5 kg enhanced group vs 0 3 2 1 control group pUnder0 001 between groups and BMI 1 0 1 2 kg m 2 enhanced group vs 0 1 0 7 kg m 2 control group pUnder0 001 between groups than the control group n 37 and had greater weight loss related knowledge pUnder0 05 elaboration pUnder0 001 and user control pUnder0 001 and less cognitive load pUnder0 001 CONCLUSIONS The results of this study suggest that the use of behavioral theory based podcasting may be an effective way to promote weight loss TRIAL REGISTRATION NCT00771095
- 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
- ItemThe use of crowdsourcing for dietary self-monitoring: crowdsourced ratings of food pictures are comparable to ratings by trained observers.(2014-08-05) Turner-McGrievy, Gabrielle M; Helander, Elina E; Kaipainen, Kirsikka; Perez-Macias, Jose Maria; Korhonen, IlkkaCrowdsourcing dietary ratings for food photographs which uses the input of several users to provide feedback has potential to assist with dietary self monitoring
- ItemVarying social media post types differentially impacts engagement in a behavioral weight loss intervention.(2015-01-13) Hales, Sarah B; Davidson, Charis; Turner-McGrievy, Gabrielle MThe purpose of this study was to examine whether different types of posts differentially affect participant engagement and if engagement with social media enhances weight loss Data are a subanalysis from a randomized weight loss study with a 4 month follow up support period via private Facebook groups and monthly meetings Counselors posted five different post types week based on social cognitive theory weight related recipes nutrition information poll votes or requests for suggestions Types of participant engagement likes comments poll votes and views were assessed Poll votes were the most engaging mean number of votes or comments poll 14 6 3 4 P Under 0 01 followed by suggestions 9 1 2 7 posts P Under 0 01 and weight related posts 7 4 3 1 posts P Under 0 01 Engagement with Facebook was significantly associated with weight loss during the 4 month maintenance period B 0 09 P 0 04 The findings provide evidence for ways to provide social support during weight loss interventions using remote methodology
- ItemWeight loss social support in 140 characters or less: use of an online social network in a remotely delivered weight loss intervention.(2013-09-27) Turner-McGrievy, Gabrielle M; Tate, Deborah FLittle is known about how online social networking can help enhance weight loss To examine the types of online social support utilized in a behavioral weight loss intervention and relationship of posting and weight loss A sub analysis of the content and number of posts to Twitter among participants n 47 randomized to a mobile social network arm as part of a 6 month trial among overweight adults examining weight loss use of Twitter and type of social support informational tangible assistance esteem network and emotional support A number of Twitter posts were related to weight loss at 6 months p Under 0 001 Initial reported weight loss predicted engagement with Twitter p Under 0 01 but prior Twitter use or initial Twitter engagement did not Most Twitter posts total posts n 2 630 were Informational support n 1 981 75 with the predominant subtype of Teaching n 1 632 62 mainly in the form of a status update n 1 319 Engagement with Twitter was related to weight loss and participants mainly used Twitter to provide Information support to one another through status updates