Tonya Turner, RD, LD MUSC Weight Management Center Sodexo Clinical Nutrition Update 2012.
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Transcript of Tonya Turner, RD, LD MUSC Weight Management Center Sodexo Clinical Nutrition Update 2012.
Tonya Turner, RD, LD MUSC Weight Management Center
Sodexo Clinical Nutrition Update 2012
12-week pilot study assessing the Bite Counter as a tool for weight lossMUSC Weight Management Center
Patrick O’Neil, PhDTonya Turner, RD
Laura Nance, RD, CDERobert Malcolm, MDSuzanne Kuker, MASusan Pechon, RN
The Bite Study has been funded through South Carolina Clinical and Translational Research Center (SCTR)
Bite Counter
The Bite Counter is worn on the wrist and functions like a watch
Automatically counts the number of bites taken at meals and snacks
Invented by two college professors from Clemson UniversityDr. Eric Muth and Dr. Adam Hoover
Manufactured in South Carolina
Study objectivesTo examine whether increases and decreases in
bite count are related to increases and decreases in caloric intake
To determine whether providing bite count feedback and bite count reduction goals will lead to reductions in numbers of bites and calorie intake
To learn how users rate the Bite Counter’s acceptability and tolerability
To see if any changes in weight and body fat are related to use of the Bite Counter
Study overview12-week pilot study2-week screening period with 1 or more visits
before the study beganParticipant visits occurred every 2 weeks for a
total of 7 visits Participants were be required to keep a 3-day
food diary during the screening period, 2 3-day food diaries during the first month, and 1 per month there after.
There were 9 visits over the course of 14 weeks
Study design20 participants were assigned to 1 of 2
conditionsFeedbackNo-Feedback
Subject CharacterizationsGenerally Healthy Males and FemalesAges 18 to 70Body Mass Indexes (BMIs)from 27 to 35
Study DesignScreening visit
Measured height, weight, and blood pressureBody composition using a bioelectrical
impedance machineMedical history Questionnaires Instruction by WMC RD on how to keep a 3 day
food diary
Study DesignBaseline Visit
Turned in screening 3 day food diaryBegan wearing a Bite Counter for 2 weeks
without feedbackAssigned another 3 day food diary Completed questionnaires
Study DesignRandomization visit
Participants were assigned to either 1 of 2 groups Feedback Non-feedback
Assigned a 3 day food diary Completed questionnaires
Study DesignStudy Visits (Weeks 4, 6, 8, and 10)
Measured weightsCompleted 2 additional 3 day food dairiesUploaded Bite Counter data Completed questionnaires
Final Visit (week 12)Measured weight, height, and blood pressureEnding body compositionUploaded Bite Counter data Completed questionnaires
Study DesignRetention
Frequent reminder calls and emailsBi-weekly follow up visitsCompensation
$50.00 for completion of all study visits $100.00 for successful return of bite counter and
charger
Dietary AimsTo provide subjects with an estimated
reduction goal for bites or calories to equal approximately 500 calories
Estimated by 3-day food diaries and 2 week run-in of wearing bite counter
Study demographics20 participants
randomized 18 females, 2 malesMean age: 46.2Mean BMI: 31.4
19 completed 17 females, 2 males10 No-Feedback9 Feedback1 Lost to follow-up
Baseline Data Calories BitesMean Caloric Intake (All
Subjects)1816 calories
Mean Calorie Goal (No-Feedback)1400 calories
Mean Bites (Randomization)184
Estimated Calories per Bite9.9 calories per bite
Mean Bite Goal (Feedback)121
Week 12 ResultsMean BMI
30.8 Changed by 0.6 BMI
points
Mean Weight Change (lbs.)No feedback- 4.29Feedback – 4.55
0123456789
10
No Feedback Feedback
Pounds Lost
Week 12 ResultsMean Caloric Intake
All Subjects - 1582 calories/day
234 Calories
No-Feedback – 1488 calories/day
(Mean Goal 1400)
Feedback – 1687 calories/day
Mean Bites All subjects – 123
bites/day Estimated Calories
per Bite 12.9 calories per bite
Feedback – 104 bites/day (Mean Goal 121)
No-Feedback – 137 bites/day
Our Observations…
1 Serving = 17 Grapes = 17 Bites = 57 Calories
1 Serving = 1 Slice Pizza = 10 Bites = 272 Calories
Which do you prefer, completing and using the eating diaries or wearing and using the Bite Counter?
44%
55%
Week 12
Bite Counter Food Diaries
70%
30%
Baseline
Bite Counter Food Diaries
Usability and TolerabilityIn the past week how much did you like this approach to dieting?
1 2 3 4 5 6 7 Extremely
Liked Extremely Disliked
Baseline: 4.2Week 12: 3.9
Usability and TolerabilityIn the past week how easy did you find it
to follow this diet?
1 2 3 4 5 6 7 Extremely
Liked Extremely Disliked
Week 12: 4.2Baseline: 3.9
Our ObservationsLimited success with use of bite counter as a
tracking methodComments from subjects
To hard to remember to turn on and offNot attractiveNot accurateNot waterproofMalfunctioned
Bite Technologies
http://www.icountbites.com/index.html