TY  - JOUR
AU  - Halse, Rhiannon E
AU  - Shoneye, Charlene L
AU  - Pollard, Christina M
AU  - Jancey, Jonine
AU  - Scott, Jane A
AU  - Pratt, Iain S
AU  - Dhaliwal, Satvinder S
AU  - Norman, Richard
AU  - Straker, Leon M
AU  - Boushey, Carol J
AU  - Delp, Edward J
AU  - Zhu, Fengqing
AU  - Harray, Amelia J
AU  - Szybiak, Maria A
AU  - Finch, Anne
AU  - McVeigh, Joanne A
AU  - Mullan, Barbara
AU  - Collins, Clare E
AU  - Mukhtar, Syed Aqif
AU  - Edwards, Kieran N
AU  - Healy, Janelle D
AU  - Kerr, Deborah A
PY  - 2019
DA  - 2019/02/25
TI  - Improving Nutrition and Activity Behaviors Using Digital Technology and Tailored Feedback: Protocol for the Tailored Diet and Activity (ToDAy) Randomized Controlled Trial
JO  - JMIR Res Protoc
SP  - e12782
VL  - 8
IS  - 2
KW  - obesity
KW  - diet
KW  - physical activity
KW  - sedentary
KW  - digital behavioral interventions
KW  - health behavior
KW  - wearable activity monitor
KW  - mHealth
KW  - eHealth
KW  - mobile food record
AB  - Background: Excess weight is a major risk factor for chronic diseases. In Australia, over 60% of adults are overweight or obese. The overconsumption of energy-dense nutrient-poor (EDNP) foods and low physical activity (PA) levels are key factors contributing to population obesity. New cost-effective approaches to improve population diet and PA behaviors are needed. Objective: This 1-year randomized controlled trial (6-month intervention and 6-month follow-up) aims to investigate whether a tailored intervention using mobile technology can improve diet and PA behaviors leading to weight loss in adults (aged 18-65 years) who are overweight or obese and recruited through a social marketing campaign (LiveLighter). Methods: All eligible participants will provide data on demographics and lifestyle behaviors online at baseline, 6 months, and 12 months. Using two-stage randomization, participants will be allocated into one of three conditions (n=200 per group): tailored feedback delivered via email at seven time points, informed by objective dietary (mobile food record app) and activity (wearable activity monitor) assessment; active control receiving no tailored feedback, but undergoing the same objective assessments as tailored feedback; and online control receiving no tailored feedback or objective assessments. Primary outcome measures at 6 and 12 months are changes in body mass, EDNP food and beverage consumption, and daily moderate-to-vigorous PA (measured via accelerometry). Secondary outcomes include change in fruit and vegetable consumption, daily sedentary behaviors, and cost effectiveness. Results: Enrolment commenced in August 2017. Primary outcomes at 12 months will be available for analysis from September 2019. Conclusions: Tailored email feedback provided to individuals may deliver a cost-effective strategy to overcome existing barriers to improving diet and PA. If found to be successful and cost effective, upscaling this intervention for inclusion in larger-scale interventions is highly feasible. Trial Registration: Australian New Zealand Clinical Trials Registry ACTRN12617000554369; https://www.anzctr.org.au /Trial/Registration/TrialReview.aspx?id=371325&isReview=true International Registered Report Identifier (IRRID): DERR1-10.2196/12782 
SN  - 1929-0748
UR  - http://www.researchprotocols.org/2019/2/e12782/
UR  - https://doi.org/10.2196/12782
UR  - http://www.ncbi.nlm.nih.gov/pubmed/30801257
DO  - 10.2196/12782
ID  - info:doi/10.2196/12782
ER  -